Roofing Material Specifications and Details Division 7 “We’ve Got the Highest Technology to Stop the Smallest Leak” FOURTH EDITION
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Roofing MaterialSpecifications and Details
Division 7
“We’ve Got the Highest Technology to Stop the Smallest Leak”
FOURTH EDITION
I N T R O D U C T I O N / I N D E X
Our Company ............................................................................2
BITEC PRODUCTS:The Finest Quality Products .......................................................3BITEC Products, overview .........................................................4APP and SBS Membranes..........................................................5Cold Applied Systems ...............................................................6Cold Applied System Adhesives.................................................7System Numbers Guide, Non-Nailable Situations .......................8System Numbers Guide, Nailable Situations ..............................9Cap Sheets Technical Data Chart ........................................10-11Base Sheets Technical Data Chart.......................................12-13BITEC Warranties ....................................................................14
GENERAL REQUIREMENTS SECTION:SECTION 1.00 ....Handling and Storage ...................................15 SECTION 1.01 ....Phasing ........................................................15 SECTION 1.02 ....Asphalt .........................................................15 SECTION 1.03 ....Asphalt Application .......................................16 SECTION 1.04 ....Asphalt Temperatures ...................................16SECTION 1.05 ....Cut Backs, Emulsions, Reflective Coatings ....17
SECTION 1.06 ....Cants ............................................................17 SECTION 2.00 ....Roof Membrane Installation ..........................17 SECTION 2.01 ....Temporary Roofs ..........................................17 SECTION 2.02 ....Base Sheet Fastening Requirements..............17SECTION 2.03 ....BITEC Modified Bitumen (Application)...........17SECTION 2.04 ....Fire Rated Membranes ..................................18SECTION 2.05 ....Base Flashings..............................................18SECTION 2.06 ....Construction Details .....................................19SECTION 2.07 ....Coatings and Surfacings ...............................19 SECTION 3.00 ....Nailable Substrate Data.................................20 SECTION 3.01 ....Steep Slope Fastening Requirements ............20 SECTION 4.00 ....General Design Criteria for Roof Decks .........20 SECTION 4.01 ....Expansion Joints ..........................................21 SECTION 4.02 ....Vapor Retarders............................................21 SECTION 4.03 ....Pressurized Plenums ....................................22 SECTION 4.04 ....Construction Details .....................................22 SECTION 4.05 ....Other Design Criteria ....................................22 SECTION 5.00 ....Roof Decks (General)....................................22 SECTION 5.01 ....Steel Decks...................................................22SECTION 5.02 ....Poured Structural Concrete.......................... 23SECTION 5.03 ....Pre-Stressed or “TT” Sections ......................23
All specifications, materials, infor-mation designs and/or literature con-tained herein, which have been writ-ten by the Manufacturer, is given forthe sole purpose of aiding the archi-tect, designer, roofing contractor andspecification writer in preparing a sys-tem to suit various needs when usingBITEC products as roofing membranesystems.
BITEC does not state, infer or implythat BITEC and/or its representativesare engineers, designers or architects,and that the information containedherein is the definitive method of appli-cation, however, the specificationscontained herein are minimums forproper installation and for potentialWarranty issuance.
BITEC merely supplies this infor-mation as a guide and accepts noresponsibility for design and con-struction of the building, roof deck, orfor uses of BITEC products not withinthese published specifications or rec-ommendations without prior notice.
BITEC will absolutely not acceptresponsibility for damages to personalproperty or injuries to individuals
before, during or after application ofBITEC manufactured products.
BITEC, INC. neither accepts norrecognizes any Warranty other thanits own. BITEC Warranties are nottransferable unless requested in writ-ing from the Warranty holder, andapproved in writing by BITEC, INC.
Approval and acceptance for war-ranty will only be given by BITECManager of Technical Services.BITEC will not issue material andlabor warranties for membrane orassemblies installed over the follow-ing conditions:• Swimming pools• Interior high humidity conditions• Existing systems with wet
materials• Improperly prepared existing
roof surfaces• Insulations not approved
by BITEC• Heated tanks• Pressurized Plenums • Freezer buildings • Cold storage buildings • Certain non-commercial buildings
• Storage silos or grain warehouses
• Structures with cables, struts,piping or conduits installedbetween the deck and roofmembrane
• Structures without positivedrainage or with evaporativecooling systems
• Plywood decks less than 1⁄2” thick
• Certain lightweight insulatingconcrete decks without theproper venting.
• Membranes under any type tile,shingles or paversBITEC reserves the right to
amend, change, delete or reviseany or all of the information, speci-fications, designs and materials con-tained herein without notice.
BITEC will not make inspectionson non-warranted roofs, nor will wewrite letters stating that we havereviewed plans, details, and/orspecifications, and find the condi-tions acceptable for the use of ourmaterial.
Questions concerning BITEC products and systems or situations not covered by this manual should be directed to:Technical Services Department • P. O. Box 497, Morrilton, Arkansas 72110 • (800) 535-8597
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I N D E XSECTION 5.04 ....Lightweight Insulating Concrete ....................23 SECTION 5.05 ....Wood Plank Decks ........................................24SECTION 5.06 ....Plywood Decks .............................................24SECTION 5.07 ....Poured Gypsum Decks..................................24 SECTION 5.08 ....Structural Wood Fiber Decks.........................24 SECTION 5.09 ....Open Beam Ceilings ......................................24 SECTION 5.10 ....Wood Nailers ................................................25 SECTION 6.00 ....Reroofing Preparation and Field Conditions...25 SECTION 6.01 ....Additional Precautions ..................................25 SECTION 6.02 ....Insulation .....................................................26 SECTION 6.03 ....Roof Insulation, Double Layer Application.....26 SECTION 6.04 ....Roof Insulation, Mechanical Attachment .......26SECTION 6.05 ....Insulation and Roof System Application ........26 SECTION 6.06 ....Base Sheet Requirements .............................27 SECTION 6.07 ....UL Listings ...................................................27 SECTION 6.08 ....FM Systems Approval .................................. 27SECTION 7.00 ....Reroofing (Retrofit) ......................................27SECTION 7.01 ....Reroofing Specification RGS-01....................27 SECTION 7.02 ....Reroofing Specification RSS-02 ....................28 SECTION 7.03 ....Statement of Acceptance...............................28 SECTION 7.04 ....Pressure Relief Vents....................................28 SECTION 8.00 ....Application Safety .........................................28 SECTION 8.01 ....Personnel .....................................................28SECTION 8.02 ....Fire Prevention .............................................28 SECTION 8.03 ....Code Authority..............................................28SECTION 8.04 ....Equipment Do’s ............................................29 SECTION 8.05 ....Equipment Don’ts .........................................29 SECTION 8.06 ....Building Do’s ................................................29SECTION 8.07 ....Building Don’ts .............................................29Roof Inspections and Maintenance ..........................................30Fasteners ................................................................................31
CONSTRUCTION DETAILS:Introduction and Table of Drawings ........................................ 32
ROOFING DETAIL DRAWINGS:
DETAIL #1 .....Draining Edge with Gutter..................................33DETAIL #1a....Draining Edge with Gutter, alternate .................33DETAIL #2 .....Flat Draining Edge (Drip Edge, Gravel Stop).......34 DETAIL #2a....Flat Draining Edge, alternate .............................34 DETAIL #3 .....Raised Roof Edge (with Cant Edge) ...................35 DETAIL #4 .....Low Raised Edge (with Tapered Edge) ...............35DETAIL #4a....Low Raised Edge (w/Tapered Edge), alternate...36 DETAIL #5 .....Typical Parapet Wall (for 2-ply Systems) ...........36 DETAIL #6 .....Parapet Wall End Termination............................37 DETAIL #7 .....Multi-Ply Base Flashing at Plywood Parapets .....37DETAIL #7A ...High Parapet Base Flashing at Plywood Walls ....38DETAIL #7B ...High Parapet Base Flashing, Masonry Walls.......38DETAIL #7C ...Multi Ply Base Flashing, Masonry Walls, ............39DETAIL #7D ...Multi-ply Base Flashing, Stone Capped Walls, ....39DETAIL #7E ...Multi-ply Base Flashing, EIFS walls....................40DETAIL #8 .....Base Flashing for Wall Supported Deck..............40 DETAIL #9 .....Base Flashing for Non Wall Supported Deck ......41 DETAIL #10 ...Base Flashing for Vented Base Sheet .................41 DETAIL #11 ...Typical Termination Bar Counterflashing............42
DETAIL #12 ...Area Divider Curb ..............................................42 DETAIL #13 ...Curb Type Expansion Joint ................................43 DETAIL #14 ...Low Profile Raised Expansion Joint .................. 43DETAIL #14A ..Low Profile Prefabricated Expansion Joint ............44DETAIL #15 ...Thru-Wall Scupper ............................................44 DETAIL #16 ...Scupper Through Raised Roof Edge ..................45 DETAIL #17 ...Roof Drain without Lead Flashing ......................45DETAIL #18 ...Roof Drain with Lead Flashing ...........................46 DETAIL #19 ...Sheet Metal Pan Roof Drain...............................46 DETAIL #20 ...Skylight, Hatch and Smoke Vent Curbs ..............47 DETAIL #21 ...Roof Top Air Handling Units ..............................47 DETAIL #22 ...Insulated Steel Deck Frame Support ..................48 DETAIL #23 ...Concrete Deck Frame Support ...........................48 DETAIL #24 ...Pipe Support with Roller Assembly....................49 DETAIL #25 ...Equipment or Sign Support Rail ........................49 DETAIL #26 ...Pipe and Flashing Clearances ............................50 DETAIL #27 ...Mechanical Equipment Stand.............................50 DETAIL #28 ...Plumbing Vent Flashing.....................................51 DETAIL #29 ...Approved One-Way Roof Vent ...........................51 DETAIL #30 ...Hot Stack Flashing Curb ....................................52 DETAIL #31 ...Piping Through Roof Deck.................................52DETAIL #32 ...Typical Pitch Pan...............................................53DETAIL #33 ...Split Repair .......................................................53
ROOF ASSEMBLY:General Requirements and Introduction...................................54
LAYING PATTERN DIAGRAMS:
#1 ...Typical Three-Ply System Over Insulation .........................55 #2 ...3-Ply System, Mech. Attached Base Sheet & Insulation.....55#3 ...Mechanically Attached Base Sheet and Insulation..............56 #4 ...Nailable Deck, without Insulation ......................................56 #5 ...Nailable Lightweight Concrete Deck...................................57 #6 ...Concrete Deck - Fully Adhered .........................................57 #7 ...Mechanically Attached Insulation, Mopped Base Sheet ......58 #8 ...Typical Re-Cover System ..................................................58
BUR MOD SYSTEMS:Introduction and Index ............................................................59Installation Parameters............................................................60Approved Products, Specification Numbers Chart ....................61Typical Laying Pattern Diagrams ........................................62-63
BUR-MOD SPECIFIC DETAIL DRAWINGS:
BM #1......Draining Edge with Gutter........................................64BM #1a ....Draining Edge with Gutter, alternate .......................64BM #2......Flat Draining Edge, Drip edge, Gravel Stop...............65BM #2a ....Flat Draining Edge, Drip edge, Gravel Stop, alternate. .65BM #7......Multi-Ply Base Flashing at Plywood Parapets ...........66BM #7A ...Base Flashing at Plywood Parapets..........................66BM #7B ...High Parapet Base Flashing at Masonry Walls..........67BM #7C ...Multi-Ply Base Flashing at Masonry ParapetsBM #28....Plumbing Vent Flashing...........................................68BM #30....Hot Stack Flashing Curb ..........................................68
Notes...............................................................Inside Back Cover
NOTE: Lower case "a" designates an alternate detail, and upper caseletters with detail numbers indicate additional similar details.
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O U R C O M PA N Y
Committed to Service and Excellence
The tensile strength of unreinforcedBITEC SBS allows 1500% elong-ation without breakage.
Even after 10,000 stress cycleson a section of membrane, thisBITEC material showed nobreakage or tearing.
Bending tests performed at-22°F (-30°C) proved BITECmaterials to be excellent foruse in the coldest of climates.
In repeated puncture tests,SBS membranes showedexcellent resistance to pene-tration and perforation.
BITEC, INCORPORATED (Pronounced Bee-tek) is a pre-
mier modified bitumen membranemanufacturer for the demandingspecifier, architect, property owneror contractor who expects qualityproducts and service to support theirbusiness and investment needs.
From our beginning in 1986,BITEC has formulated and producedhigh quality modified bituminousroofing and waterproofing mem-branes, marketed through distribu-t ion th roughout the U.S. andCanada.
Our partner in technology, INDEXS.p.A., is a world leader in the man-ufacture of modified bitumen mem-branes. Today, BITEC has becomewell-known throughout the roofingindustry as a leader in quality andservice.
Specializing only in the manufac-ture of modified bituminous mem-branes, BITEC offers our customersover 60 years of combined mem-brane manufacturing experience,both in development of technologyand the manufacture of roofing andwaterproofing membranes.
BITEC excels in this by concen-trating only on the manufacture ofthe finest quality modified bitumi-nous membranes, without diversifi-cation to other segments of the roof-ing industry.
OUR STATE-OF-THE-ARTMANUFACTURING
FACILITYOur plant in Morrilton, Arkansas,
features the most recent develop-ments in modified bitumen manu-facturing, along with integratedtechnological advances through ourpartners at INDEX. This capabilityprovides the customer with the high-est quality products in the markettoday.
Our location places us in closeproximity to the finest crude oilsources which are recognized asbeing the most compatible asphaltavailable for polymer modification.
UNEQUALLEDTECHNICAL SERVICE
AND SUPPORTOur technical department is
staffed with roofing industry profes-sionals, and is always available todiscuss your project in a timely andthorough manner.
BITEC is dedicated to providingcomplete project assistance andcomprehensive technical support inall phases of your construction, fromplanning to installation.
BITEC can also supply you with awide range of up-to-date technicalpublications which cover most typesof roofing and waterproofing require-ments.
LET BITECSHOW YOU HOW
BITEC sponsors many seminarsthroughout the U.S., on modified bitu-men products and systems, featur-ing application and hands-on tech-niques. You can be informed ofchanges in materials, regulations,trends, techniques or potential prob-lems that affect your business.
OUR GREAT LOCATION
MEANS FAST SHIPPINGOur central U.S. location and close
proximity to truck, rail and bargetransportation will allow BITEC toexpedite shipments to any locationin the nation, and a mild local climatemeans minimal shipping problems.
QUALITY PRODUCTSPROVIDE QUALITY
WARRANTIESBITEC recognizes your require-
ments for quality; we constantlydemand it of ourselves and our prod-ucts. The consistent high quality ofour membranes allows us to offernot only the industry standard, butalso warranties that can range in cov-erage up to 20 years for workman-ship and materials.
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THE FINEST QUALITY PRODUCTS
Our membranes are producedwith the highest quality made-on-purpose polymers obtainable today,and blended with distilled asphalt,insuring consistent modification andproduct performance. Our APP andSBS modified bitumen products yieldthe best flexibility, durability andworkability properties of any productavailable.
QUALITYREINFORCEMENTS
MAKE THE DIFFERENCEWe use Spunbond Polyester roof-
ing fabric as reinforcement for all ofour polyester reinforced membranes.
High strength fiberglass mat is usedin our “FR” (fire-rated) products aswell as in most of our COMPABASEmodified bitumen base sheets.
Both reinforcements provide excel-lent isotropic mechanical strength aswell as puncture resistance.
BITEC MEMBRANES AREEASY TO APPLY...
Our full line of APP and SBS mod-ified bitumen membranes, both capsheet and base sheet types, are man-ufactured to form a monolithic mem-brane, rather than being a manufac-tured laminated product that is pre-sat-urated with oxidized asphalt and con-taining a high stabilizer content.
The result is a quality membranethat will lay flat without wrinkles andinsure proper bonding properties,while requiring less heat and lesslabor to install.
BITEC modified bitumen mem-branes are available for application
by heat welding, hot asphalt and coldadhesive methods.
THE MOST MODERNRESEARCH AND
DEVELOPMENT PROCESSIN THE COUNTRY...
Our quality control laboratory andstate-of-the-art testing equipmentguarantees an outstanding finishedproduct. It also insures in the future,BITEC will be at the forefront ofdeveloping new and improved prod-ucts tailored specifically to yourregional requirements. BITEC prod-ucts meet or exceed productapproval recogni t ion of theUnderwriters Laboratories, FactoryMutual Research, Metro Dade, Cityand County of Denver and BDA BuroDakadvies B.V.
Ultraviolet microscopy shows a BITEC testbatch sample as a homogeneous mixture ofdistilled asphalt and special modifiers. Thisblend insures a superior molecular composi-tion and provides a stronger, and more elasticfinished product.
This magnification illustrates inconsistencies ina competitor's test batch largely to non-thor-ough blending of the base elements. The mem-branes produced from this formulation wouldprobably fail most fatigue and aging tests.
This photo shows a definite separation of thedistilled asphalt-modifier blend. Membranesfrom this recipe would not have the desiredqualities of strength, elasticity and long-life thatare required to meet our high standards.
Superior Quality from the Start
METRO•DADE
DADE COUNTY, FL
CLASSIFIED
R-13231
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B I T E C P R O D U C T S
CAP SHEETSAPS-4T ......................Torch AppliedAPM-4T ......................Torch AppliedAPM-4.5T ...................Torch AppliedSPM-4.5T ...................Torch AppliedSPM-3.5H .....................Mop AppliedSPM-4H ........................Mop AppliedSPM-4H-250 ................Mop AppliedSPS-3H ........................Mop AppliedSFM-3.5H .....................Mop AppliedSFM-3.5H-FR ...............Mop AppliedSFM-4H-FR ..................Mop Applied
BASE SHEETSFA-2T .........................Torch AppliedFS-2H ...........................Mop AppliedFS-2H Plus ..................Mop AppliedPS-2H ...........................Mop AppliedFS-25 ...........................Mop AppliedFS-40 ...........................Mop AppliedBFS-2H ........................Mop AppliedFS-2H-FR .....................Mop AppliedBeta Base ......Mop or Mech. Attached
FR - Fire Rated; Class “A” UL-Rated Cap sheets and Base sheets
PRODUCT NAMES - CAP SHEETSusing example: APS-4T
A - Modifier ...................................A = APP or S = SBS
P - Reinforcement.................P = Polyester, F = Fiberglass
S - Surface ............................S = Smooth, M = Mineral
4 - Thickness .....................2, 3, 3.5, 4 or 4.5 Millimeters
T - Application ....................T = Torch, H = Hot Asphalt
PRODUCT NAMES - BASE SHEETSusing example: FS-2H
F - Reinforcement .................P = Polyester, F = Fiberglass
S - Modifier ...................................S = SBS or A = APP
2 - Thickness ............................1, 2, or 2.2 Millimeters
H - Application ....................T = Torch, H = Hot Asphalt
FIRE RATED MEMBRANESBITEC “FR” membranes provide UL Class “A”fire-rated assemblies for slopes up to 3⁄4" in 12" (3⁄4":12") without the use of additional coating.
"FR" membranes are reinforced with a high-strength fiberglass mat.
MINERAL DESIGNBITEC’s “Mineral Design” cap sheet
membranes provide an attractive design to otherwise ordinary roof areas.
Mineral design is available in both APP (MDA) and SBS (MDS),
in eight patterns and 13 granule colors.
POLYMER ADHESIVESFor application of mop grade membrane sheets:
PMA-186 for squeegee, roller or brush application and trowel grade PMA-2000.
Both are excellent for filling pitch pansand sealing penetration flashings.
Plaza Decks Pitched RoofsFlat Roofs Curved Roofs
Sub-flooringShed Roofs Metal Decks Foundations
Roof Gardens Re-surfacing
Roofing Details Parking decks
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A P P M E M B R A N E S
Versatile, Long Lasting and Weather ResistantBITEC APP modified bitumen
membranes are composed of selectAPP polymers blended with distilledasphalt and reinforced with aSpunbond Polyester fabric.
All BITEC APP membranes areinstalled by HEAT WELDING andhave the following characteristics:
• High melting temperatures
• Flexibility at low temperatures
• High resistance to thermaldegradation
• Resistance to ultraviolet lightdegradation.
• Excellent substrate adhesion
• Resistance to most acids andbases
• Impermeability to water
BITEC APP modified bitumenmembranes may be used to water-proof prefabricated concrete roofs,roof systems with metal and wooddecks, thermal insulations, pavedroofs or walkways, foundations, andconstructions such as multi-storyparking decks.
BITEC APS-4T, a smooth sur-faced APP modified bitumen mem-brane, can be coated or le f tuncoated according to the specificsystem specification.
BITEC APM-4T, a mineral sur-faced APP modified bitumen mem-brane, contains factory installedroofing granules which eliminate theneed for installing a protective coat-ing. Mineral surfacings reduce ther-
mal and ultraviolet light degrada-tion, and slow the normal processesof membrane ageing.
BITEC membranes that areapplied by heat welding contain apolypropylene and/or polyethylenecovering to prevent roll blocking andprovide a site indicator for properwelding temperature. These filmswill melt, allowing the APP modi-fied bitumen compound to adhere toitself and the substrate beingbonded to.
The only tools required for appli-cation of BITEC APP membranesare a propane gas fired roofer’storch, a round nose roofer’s trowel,a hookblade roofer’s knife and apair of fire resistant gloves.
S B S M E M B R A N E S
Strong and Flexible for Demanding ApplicationsBITEC SBS modified bitumen
membranes are composed ofstyrene-butadiene-styrene thermo-plastic rubber, blended with distilledasphalt and reinforced with aSpunbond Polyester fabric or highstrength fiber glass mat.
BITEC SBS membranes aremanufactured to suit a variety ofapplication methods, and possessthe following characteristics:
• Impermeability to water
• Outstanding flexibility at verylow temperatures
• Resistance to thermal aging
• Excellent substrate adhesion
• Resistance to perforation
• Superior elasticity
• Excellent mechanical andfatigue strength
• Tear resistance
• Dimensional stability
It is necessary to have a factoryinstalled or on-site installed sur-facing on SBS modified bitumenmembranes, therefore, most ofBITEC’s SBS modified bitumenmembranes come with factoryinstalled roofing granules for thispurpose.
With our smooth surfaced prod-uct SPS-3H, a site installed sur-facing of either a flood coat andgravel, or approved roof coatingmust be applied for ultraviolet lightprotection.
OUR SPM and SFM family ofmembranes contain factory installedroofing granules eliminating theneed to add on-site surfacings.
Tools required for the proper appli-cation of these products are detailedin the BITEC product manual andtechnical bulletins relative to thespecific SBS modified bitumenmembrane being used.
For heat welded systems, bondingis performed with a propane gasfired roofer’s torch.
For hot asphalt applied systems,bonding is performed with the use ofASTM D312 Type III, or Type IVroofing asphalt applied with con-ventional equipment.
For cold adhesive applied sys-tems, bonding should be performedwith BITEC elastomeric adhesives,or with any BITEC approved elas-tomeric adhesives. For all applica-tions, the membrane should be laidout, aligned and completely bondedto the substrate as prescribed in theproject’s written specification, andis contingent upon the specificmethod of application.
Particular care should be taken toensure that all seams or laps arecompletely sealed.
As always, good roofing practicesshould be considered and used.
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C O L D A P P L I E D S Y S T E M S
INTRODUCTION
BITEC’s cold adhesive appliedSBS modified bitumen membranesgive you better security and perfor-mance than conventional roll roof-ing products made with oxidizedasphalt.
Their application range covers avariety of slopes and deck configu-rations. From 1⁄4" in 12" up to 3" in12", the membrane is functional.Another advantage is that hot asphaltand open flame are not required forinstallation. This reduces the poten-tial for fire.
A specially formulated cold adhe-sive is used to install the membrane.After a short curing time the coldadhesive applied system forms aflexible, durable, watertight systemthat will outlast conventional roofingsystems.
PRODUCTS
BITEC SBS modified bitumenmembranes SPM-3.5H and SFM-3.5H are recommended for use bythis method. However, any BITECsand surfaced SBS modified bitumenproduct can be installed using coldapplied adhesives. These mem-branes are tear and puncture resis-tant, have excellent flexibility and per-formance as opposed to conventionalorganic and fiberglass reinforcedblown asphalt coated membranes.
BITEC SBS modified bitumenmembranes are composed of distilledasphalt modified with SBS thermo-plastic rubber. A high strength fiber-glass or polyester reinforcement isused as support.
ADHESIVES
BITEC PMA 186 field grade SBSmodified bitumen adhesive is rec-ommended for use on low slopeapplications, while PMA 2000, trowelgrade SBS modified bitumen adhe-sive is recommended for all flash-ings and higher slope applications.
Both adhesives contain an SBSthermoplastic rubber as a modifier,
ensuring complete compatibilitybetween the cap sheet and theadhesive.
Follow all good roofing practices,and BITEC specifications wheninstalling adhesive applied mem-branes. Base sheet and insulationmust be mechanically attached todeck.
Use only BITEC SBS modifiedbitumen membranes having sand onthe bottom surface and granules onthe top surface. (SPM-3.5H or SFM-3.5H).
Adhesive may be applied at tem-peratures between 55° F and 120° F.Only BITEC approved adhesivesshould be used to install these mem-branes. Follow adhesive manufac-turer ’s appl icat ion rates wheninstalling these membranes. Typically,application rates will be 11⁄2 gallonsper 100 f t2. Apply adhesive bynotched squeegee with notches 1⁄4"long, 1⁄8" deep and spaced 1" on cen-ter, or by using a three knot brush ornotched trowel.
Trowel grade flashing cementshould be applied 1⁄8" thick over thearea receiving the flashing membraneat an application rate of 1 gal. per 20sq. ft. or 5 gal. per 100 sq. ft.
Deck should be built with 1⁄2" min.plywood or 3⁄4" min. wood boards.Deck shall be dry, smooth and freeof debris. Deck should be built to pro-vide 1⁄4" in 12" minimum slope.
Base sheet should be UL ListedType G2 or 43# organic. Base sheetmust be attached using suitable fas-teners (i.e. Simplex nails) 9" on thelaps and stagger nailed 18" o.c. inthe field.
Flashing material shall be the samematerial used for field membrane.Slopes above 3⁄4:12 require the basesheet and membrane to be installedparallel to the slope with base sheetfastened as noted above. The capsheet membrane should be blind fas-tened at end laps, 2" from the topedge and 6" o.c. across the sheetwidth, using nails and tin discs orscrews and plates.
GENERALREQUIREMENTS
■ Performs Better thanConventional Roll Roofing
■ No Hot Asphalt or OpenFlame Required
■ Excellent Tear andPuncture Resistance
■ Easy to Apply, Easy toMaintain
■ Excellent Cold Flexibility
For slopes 1/4" to 3/4"
For slopes greater than 3/4"
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COLD APPLIED SYSTEM ADHESIVES
PMA-186 PMA-2000
Nominal Weight 8.25 lb. / gal. 8.5 lb. / gal
SBS Rubber 8% by solids 7.5% by solids
Cure Time Tacks in 20 min., Dries in 2-5 days.
Cures within 2 weeks, forming elastic bond.
67 sq. ft./gal. 1/8" Thick, Application Rate or 20 sq. ft. / gal. or
1.5 gal./100 sq. ft. 5 gal./100 sq. ft.
Exceeds all parameters of ASTM D 3019 and SCC 153.
PMA-186
POLYMER MODIFIED ADHESIVE
For Squeegee, roller orbrush application.
PMA-186 is a fibrated, heavy bod-ied, SBS rubberized, modif iedasphalt adhesive, blended with thehighest quality bitumen.
USES: For application of mopgrade SBS modified bitumen mem-brane sheets in lieu of moppingasphalt.
An excellent product for fillingpitch pans and sealing penetrationflashings on SBS roof membranes.
Torch grade SBS modified bitu-men membranes and APP modi-fied bitumen membranes cannotbe installed with this product.
It is highly recommended to alu-minum coat or embed roofing gran-ules in the exposed adhesive for UVprotection.
PMA-2000
POLYMER MODIFIED FLASHING MASTIC
All Weather, Trowel GradePMA-2000 is a fibrated, heavy
bodied, SBS rubberized, modifiedasphalt adhesive, blended with thehighest quality bitumen.
USES: For application of mopgrade SBS modified bitumen mem-branes and flashing sheets in lieu ofPMA 186.
An excellent product for fillingpitch pans and sealing penetrationflashings on SBS roof membranes.
Torch grade SBS modifiedbitumen membranes and APPmodified bitumen membranescannot be installed with thisproduct.
It is highly recommended to alu-minum coat or embed roofing gran-ules in the exposed adhesive for UVprotection.
INSTALLATION
The adhesive should be appliedusing a notched squeegee, brush ortrowel, following the guidelines andapplication rates set forth in BITECtechnical publications relative to coldadhesive application.
–––––––––––––––––––––––––––Special care should be taken not
to over-apply the adhesive. Over-application can cause degradationof the membrane.
Positive drainage should alwaysbe provided in order to preventponding water.
Never install more than one plyof membrane in adhesive. Multi-plyapplication is not recommended.
–––––––––––––––––––––––––––A typical system would be com-
posed of a nailed UL Listed G2 fiber-glass reinforced base sheet, with theadhesive applied BITEC cap sheetinstalled as the finished surface.
DANGER - Keep out of the Reachof children and pets. Combustiblematerial. Product is for commercialor industrial use. Harmful or fatal ifswallowed. Contains petroleum min-eral spirits.
If swallowed, do not induce vom-iting. Call physician or poison controlcenter immediately. For contact withskin, wash with soap and water.
Do not use solvent or mineral spir-its to clean hands. For eye contact,flush eyes with copious amount ofwater and seek medical attentionimmediately.
This material is combustible. Keepaway from heat source, fire or flame.Store materials in original containers.Do not use this container for anythingother than its intended use.
Dispose of empty container as dic-tated by local code. Close containerafter each use. Avoid breathing mistor vapor. Use in well ventilated area.
–––––––––––––––––––––––––––For warranty information govern-
ing cold adhesive applied membraneproducts, contact BITEC’s TechnicalServices Department.
5 gal. can
3 gal. can
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NON-NAILABLE (.1) and NAILABLE (.2)DEFINITIONS
BITEC defines non-nailable spec-ifications as those “situations” whereno fasteners are used in the entirenew roof system.
Nailable specifications include all“situations” where fasteners of anytype have been used within the newroof system.
EXAMPLES:
A concrete deck normally con-sidered to be a non-nailable deck,would be considered a nailable deckif insulation or base sheet wasmechanically fastened.
Therefore, APM-4T.2 designatesa roof system using mechanical fas-teners and an APM-4T cap sheet.APM-4T.1 would designate a roofsystem without fasteners and anAPM-4T cap sheet.
WARRANTY PERIODDESIGNATIONS
All specifications for warranty sys-tems other than the 10-year systemsmust be pre-approved by BITEC’sTechnical Services Department.
Warranty periods other than 10years are designated by the addi-tion of .12 for 12 years, .15 for 15years or .20 to indicate a 20-yearwarranty period.
NON-NAILABLE SITUATIONSFor new or replacement systems • For Hybrid Systems, see BUR-MOD Section, pgs. 59-68
APS-4T.1 10-yr. No; 12-yr. Yes 2 BETA BASE APS-4T — — **OPTIONALAPM-4T.1 10-yr. No; 12-yr. Yes 2 BETA BASE APM-4T — — —APM-4.5T.1 10-yr. No; 12-yr. Yes 2 BETA BASE APM-4.5T — — —SPM-4.5T.1 10-yr. No; 12-yr. Yes 2 BETA BASE SPM-4.5T — — —SPM-3.5H.1 10-yr. No; 12-yr. Yes 2 BETA BASE SPM-3.5H — — —SFM-3.5H.1 10-yr. No; 12-yr. Yes 2 BETA BASE SFM-3.5H — — —SFM-3.5H-FR.1 10-yr. No; 12-yr. Yes 2 BETA BASE SFM-3.5H-FR — — —SPS-3H.1 10-yr. No; 12-yr. Yes 2 BETA BASE SPS-3H — — COAT./GRAVEL
APS-4T.1.15 Yes 3 BETA BASE FA-2T APS-4T — COATINGAPM-4T.1.15 Yes 3 BETA BASE FA-2T APM-4T — —APM-4.5T.1.15 Yes 3 BETA BASE FA-2T APM-4.5T — —SPM-4.5T.1.15 Yes 3 BETA BASE PS-2H or FS-2H SPM-4.5T — —SPM-3.5H.1.15 Yes 3 BETA BASE PS-2H or FS-2H SPM-3.5H — —SFM-3.5H.1.15 Yes 3 BETA BASE PS-2H or FS-2H SFM-3.5H — —SFM-3.5H-FR.1.15 Yes 3 BETA BASE PS-2H or FS-2H SFM-3.5H-FR — —SPS-3H.1.15 Yes 3 BETA BASE PS-2H or FS-2H SPS-3H — GRAVEL
APS-4T.1.20 Yes 3 BETA BASE APS-4T APS-4T — COATINGAPS-4T.1.20 Yes 3 NONE FA-2T APS-4T APS-4T COATINGAPM-4T.1.20 Yes 3 BETA BASE APS-4T APM-4T — —APM-4T.1.20 Yes 3 NONE FA-2T APS-4T APM-4T —APM-4.5T.1.20 Yes 3 BETA BASE APS-4T APM-4.5T — —APM-4.5T.1.20 Yes 3 NONE FA-2T APS-4T APM-4.5T —SPM-4.5T.1.20 Yes 3 BETA BASE SPS-3H SPM-4.5T — —SPM-4.5T.1.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SPM-4.5T —SPM-3.5H.1.20 Yes 3 BETA BASE SPS-3H SPM-3.5H — —SPM-3.5H.1.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SPM-3.5H —SFM-3.5H.1.20 Yes 3 BETA BASE SPS-3H SFM-3.5H — —SFM-3.5H.1.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SFM-3.5H —SFM-3.5H-FR.1.20 Yes 3 BETA BASE SPS-3H SFM-3.5H-FR — —SFM-3.5H-FR.1.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SFM-3.5H-FR —SPS-3H.1.20 Yes 3 BETA BASE SPS-3H SPS-3H — GRAVELSPS-3H.1.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SPS-3H GRAVEL
SystemNumber
No. ofPlies
Base SheetNon-modified
First Ply,Modified
Second Ply,Modified
Third Ply,Modified
AdditionalSurfacing
10
–1
2Y
EA
R1
5 Y
EA
R2
0 Y
EA
R
*Exception: Add’l insulation not req'd. over light wt. insulating concrete decks or gypsum decks. **Optional approved roof coating for 10 yrs; coating req'd. for 12 yrs.15 and 20 year warranties are available only for new construction or complete tear-off projects.
InsulationRequired*
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using example: APS-4T.1.20A = APP ModifierP = Polyester ReinforcementS = Smooth Surface4 = 4mm ThickT = Torch Applied.1 = Non-Nailable “Situation”
.20 = 20-Year Warranty
NAILABLE SITUATIONSFor new or replacement systems • For Hybrid Systems, see BUR-MOD Section, pgs. 59-68
APS-4T.2 10-yr. No; 12-yr. Yes 2 BETA BASE APS-4T — — **OPTIONALAPM-4T.2 10-yr. No; 12-yr. Yes 2 BETA BASE APM-4T — — —APM-4.5T.2 10-yr. No; 12-yr. Yes 2 BETA BASE APM-4.5T — — —SPM-4.5T.2 10-yr. No; 12-yr. Yes 2 BETA BASE SPM-4.5T — — —SPM-3.5H.2 10-yr. No; 12-yr. Yes 2 BETA BASE SPM-3.5H — — —SFM-3.5H.2 10-yr. No; 12-yr. Yes 2 BETA BASE SFM-3.5H — — —SFM-3.5H-FR.2 10-yr. No; 12-yr. Yes 2 BETA BASE SFM-3.5H-FR — — —SPS-3H.2 10-yr. No; 12-yr. Yes 2 BETA BASE SPS-3H — — COAT./GRAVEL
APS-4T.2.15 Yes 3 BETA BASE FA-2T APS-4T — COATINGAPM-4T.2.15 Yes 3 BETA BASE FA-2T APM-4T — —APM-4.5T.2.15 Yes 3 BETA BASE FA-2T APM-4.5T — —SPM-4.5T.2.15 Yes 3 BETA BASE PS-2H or FS-2H SPM-4.5T — —SPM-3.5H.2.15 Yes 3 BETA BASE PS-2H or FS-2H SPM-3.5H — —SFM-3.5H.2.15 Yes 3 BETA BASE PS-2H or FS-2H SFM-3.5H — —SFM-3.5H-FR.2.15 Yes 3 BETA BASE PS-2H or FS-2H SFM-3.5H-FR — —SPS-3H.2.15 Yes 3 BETA BASE PS-2H or FS-2H SPS-3H — GRAVEL
APS-4T.2.20 Yes 3 BETA BASE APS-4T APS-4T — COATINGAPS-4T.2.20 Yes 3 NONE FA-2T APS-4T APS-4T COATINGAPM-4T.2.20 Yes 3 BETA BASE APS-4T APM-4T — —APM-4T.2.20 Yes 3 NONE FA-2T APS-4T APM-4T —APM-4.5T.2.20 Yes 3 BETA BASE APS-4T APM-4.5T — —APM-4.5T.2.20 Yes 3 NONE FA-2T APS-4T APM-4.5T —SPM-4.5T.2.20 Yes 3 BETA BASE SPS-3H SPM-4.5T — —SPM-4.5T.2.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SPM-4.5T —SPM-3.5H.2.20 Yes 3 BETA BASE SPS-3H SPM-3.5H — —SPM-3.5H.2.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SPM-3.5H —SFM-3.5H.2.20 Yes 3 BETA BASE SPS-3H SFM-3.5H — —SFM-3.5H.2.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SFM-3.5H —SFM-3.5H-FR.2.20 Yes 3 BETA BASE SPS-3H SFM-3.5H-FR — —SFM-3.5H-FR.2.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SFM-3.5H-FR —SPS-3H.2.20 Yes 3 BETA BASE SPS-3H SPS-3H — GRAVELSPS-3H.2.20 Yes 3 NONE PS-2H or FS-2H SPS-3H SPS-3H GRAVEL
10
–1
2Y
EA
R1
5 Y
EA
R2
0 Y
EA
R
*Exception: Add’l insulation not req'd. over light wt. insulating concrete decks or gypsum decks. **Optional approved roof coating for 10 yrs; coating req'd. for 12 yrs.15 and 20 year warranties are available only for new construction or complete tear-off projects.
SystemNumber
No. ofPlies
Base SheetNon-modified
First Ply,Modified
Second Ply,Modified
Third Ply,Modified
AdditionalSurfacing
InsulationRequired*
using example: SFM-3.5H-FR.2.15S = SBS ModifierF = Fiberglass ReinforcementM = Mineral Surface3.5 = 3.5mm thickH = Hot Asphalt Applied
FR = Fire Rated - UL Class A without add’l. surfacing.2 = Nailable “Situation”.15 = 15-Year Warranty
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C A P S H E E T S
APS-4T* APM-4T** SFM-3.5H SPS-3HTORCH APPLIED TORCH APPLIED MOP APPLIED MOP APPLIED
MODIFIER APP APP SBS SBSAPP = Atactic Polypropylene, SBS = Styrene Butadiene Styrene)
APPROX. ROLL SIZE 33.5' x 3.28' 32.80' x 3.28' 33.9' x 3.28' 33.5' x 3.28'(Flashing width rolls available)
SEAM WIDTH 3" Line 3.5" Selvedge 3.5" Selvedge 3" Line
APPROX. COVERAGE 100 ft2 97 ft2 100 ft2 100 ft2
TOP SURFACE Smooth / Talc Mineral Mineral Fine Sand(Standard colors; buff, white, black)
Burn-off Burn-offBOTTOM SURFACE Polyethylene Polyethylene
Sand Sand
NOMINAL THICKNESS 4 mm 4 mm 3.5 mm 3 mm
NOMINAL WEIGHT 90 lb. 107 lb. 100 lb. 73 lb.
Spunbond Spunbond SpunbondREINFORCEMENT Polyester Polyester
FiberglassPolyester
ASTM D-36
SOFTENING POINT302°F (150°C) 302°F (150°C) 250°F (120°C) 250°F (120°C)
UNI-8202
COLD FLEX. TEMP5°F (-15°C) 5°F (-15°C) -13°F (-25°C) -13°F (-25°C)
ASTM D-412 Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.TENSILE STRENGTH ( LB / IN ) 100.....70 100.....70 80.....75 105.....75
ASTM D-412 Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.% of ELONGATION TO BREAK 50.....55 50.....55 30.....30 60.....70
*Also available with 5mm thickness; specify APS-5T **Also available with 4.5 mm thickness; specify APM-4.5T
ADVANTAGESBITEC modified bitumen cap sheet
products are specially designed forthe modern roofing professional.Select distilled asphalt and on-pur-pose made polymers are used in allof our blends. Reinforcement is withpolyester fabric or fiberglass mat. Ourstate-of-the-art engineering and tech-nology provide you with the highestquality waterproofing and roofingmembranes, roll for roll. Combiningthis quality with the know-how to getthe job done, BITEC products comewith professional service and excel-lent technical assistance.
Unlike conventional oxidizedasphalt products, BITEC modifiedbitumen cap sheet products are flex-ible, easy to install high-performance
membranes, available with smoothor mineral surfaces. Modified bitu-men compounds are formulated andtested for every batch of product pro-duced. All BITEC products are qual-ity control monitored throughout themanufacturing process.
Mineral surfacing can be suppliedin a variety of colors. Parting agentssuch as talc, sand and polymer filmsare used to facilitate application.Selvedge edge and ply stripes areprovided in various configurations.
PREPARATIONCareful surface preparation is
important. Surfaces must be clean,visibly dry, smooth and covered witha UL Listed G2 base sheet using afiberglass reinforcement. All acces-
sories required for the installation shallbe on hand prior to commencementof work wherever possible.
Any blisters, wet roofing materials,or deteriorated decking shall beremoved and replaced.
Masonry surfaces and metal sur-faces shall be primed with an ASTMD41 asphalt primer. Primer shall beallowed to dry completely before themembrane is installed.
INSTALLATIONProduct names for BITEC give the
method of application. All productshaving T as the ending, such as APS-4T, are for torch application only.Products having H as an ending arefor hot asphalt application as well ascold adhesive, such as SPM-3.5H.
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C A P S H E E T S
SPM-3.5H SPM-4H SPM-4H-250 SPM-4.5T SFM-3.5H-FR SFM-4H-FRMOP APPLIED MOP APPLIED MOP APPLIED TORCH APPLIED MOP APPLIED MOP APPLIED
SBS SBS SBS SBS(1) SBS SBS
33.9' x 3.28' 32.8' x 3.28' 32.8' x 3.28' 25.58' x 3.28' 33.9' x 3.28' 33.9' x 3.28'
3.5" Selvedge 3.5" Selvedge 3.5" Selvedge 3.5" Selvedge 3.5" Selvedge 3.5" Selvedge
100 ft2 97 ft2 97 ft2 75 ft2 100 ft2 100 ft2
Mineral Mineral Mineral Mineral Mineral Mineral
Burn-offSand Sand SandPolypropylene
SandSand
3.5 mm 4 mm 4 mm 4.5 mm 3.5 mm 4 mm
100 lb. 105 lb. 105 lb. 92 lb. 103 lb. 105 lb.
Spunbond Spunbond Polyester SpunbondPolyester Polyester 250 gm2 Polyester
Fiberglass Fiberglass
250°F (120°C) 250°F (120°C) 250°F (120°C) 250°F (120°C) 250°F (120°C) 250°F (120°C)
-13°F (-25°C) -13°F (-25°C) -13°F (-25°C) -13°F (-25°C) -4°F (-20°C) -4°F (-20°C)
Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.105.....75 105.....75 120.....85 120.....85 120.....120 120.....120
Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.60.....70 60.....70 60.....60 60.....70 40.....40 40.....40
(1) New SBS specifically engineered for torch application
Torch application is performed byusing a standard propane firedroofer’s torch.
Hot application is performed byinstalling the membrane in ASTMD312 Type III, or Type IV asphalt.
Cold Adhesive application is per-formed by using BITEC PMA 186, orPMA 2000 modified bitumen adhe-sive. Caution: installing both thebase sheet and cap sheet in coldadhesive is not recommended.
The BITEC modified bitumenmembrane shall be installed over apreviously prepared substrate.Substrate with or without insulationshall have a UL Listed Type G2 fiber-glass base sheet installed as a baseto receive the BITEC modified bitu-men membrane.
Align the roll of membrane bycompletely unwinding. Rewind theroll half way, install by method ofdesign, then install other portion ofroll in the same fashion.
See the individual product speci-fication for proper side and end lapcoverage, as well as for the methodof application.
Installation is enhanced due toflexibility and strength of membrane,as the membrane is provided as acomposite sheet.
At the completion of the day’swork, a suitable night dry-in shall beprovided, regardless of weather con-ditions. It is advisable to only roofan area that can be completed in atypical work day. Never phase theroof system.
PRECAUTIONSAs with any roofing project, safety
shall be a consideration. The use ofpropane fired roofing installationequipment, molten asphalt and sol-vent based adhesives pose potentialfire and burn hazards.
Adequate protective clothing suchas work gloves, long sleeve shirt, longpants and durable, flat soled shoesshould be worn.
The roofing contractor shall pro-vide safety training to all his person-nel covering, but not limited to: theuse and storage of propane, safeinstallation procedures and safe work-ing habits.
All procedures and training shallconform to local, state and federalrequirements.
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B A S E S H E E T S
ADVANTAGESCOMPABASE APP and SBS
modified bitumen base sheets arecomposed of select distilled bitumenand made-on-purpose polymers,reinforced with polyester fabric orfiberglass mat.
COMPABASE APP or SBS mod-ified bitumen base sheets eliminatethe concern of compatibility and per-formance between base sheet andmodified bitumen cap sheet. Modifiedbitumen cap sheets that are bondedto oxidized bitumen coated basesheets, especially using the heatwelding process, are not totally com-patible. The use of COMPABASEAPP and SBS base sheets elimi-nates this problem.
COMPABASE APP and SBSmodif ied bitumen base sheetsremove the concern that the basesheet, of oxidized bitumen, becomesthe “weak link” in membrane systemperformance. Oxidized bitumencoated base sheets do not containAPP or SBS modifiers. They tend tobe brittle and difficult to work withduring cold temperatures. Modifiedbitumen base sheets overcome thisproblem.
COMPABASE APP and SBSmodified bitumen base sheetswhen used in conjunction withBITEC cap sheets of the samemodifier give the roof membranesystem complete compatibility andunsurpassed 2-ply modified bitu-men system performance.
INSTALLATION COMPABASE APP and SBS
modified bitumen base sheets areinstalled as per design. As with ourmodified bitumen cap sheets theproduct name designates the methodof application.
For instance: if a product nameends in T, such as FA-2T, the mem-brane is suitable for torch applica-tion only. If the product name ends inH, such as FS-2H, the membrane issuitable for either hot asphalt or coldadhesive application. However, aswith any base sheet, mechanicalattachment of the base sheet is alsoallowed. (For system requirementsand methods of installation, refer totechnical bulletins in the BITEC
FA-2T PS-2H FS-2H FS-2H PlusTORCH APPLIED MOP APPLIED MOP APPLIED MOP APPLIED
MODIFIER APP SBS SBS SBSAPP = Atactic Polypropylene, SBS = Styrene Butadiene Styrene)
APPROX. ROLL SIZE 49.2' x 3.28' 49.2' x 3.28' 49.2' x 3.28' 49.2' x 3.28'
SEAM WIDTH 3" 3" 3" 3"
APPROX. COVERAGE 150 ft2 150 ft2 150 ft2 150 ft2
TOP SURFACE Sand Sand Sand Sand
PolyethyleneBOTTOM SURFACEFilm
Sand Sand Sand
NOMINAL THICKNESS 2 mm 2 mm 2 mm 2.2 mm
NOMINAL WEIGHT 70 lb. 70 lb. 70 lb. 80 lb.
SpunbondREINFORCEMENT FiberglassPolyester
Fiberglass Fiberglass
ASTM D-36
SOFTENING POINT302°F (150°C) 240°F (116°C) 240°F (116°C) 240°F (116°C)
UNI-8202
COLD FLEX. TEMP14°F (-10°C) 14°F (-10°C) 14°F (-10°C) 14°F (-10°C)
ASTM D-412 Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.TENSILE STRENGTH ( LB / IN ) 78.....67 105.....80 80.....70 80.....70
ASTM D-412 Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.% of ELONGATION TO BREAK 6.....6 50.....50 6.....6 6.....6
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B A S E S H E E T SProduct Guide for complete details.)
Torch application is performed byusing a standard propane firedroofer’s torch.
Hot application is performed byinstalling the base sheet in ASTMD312 Type III, or Type IV asphalt.
Cold Adhesive application is per-formed by using BITEC PMA 186,or PMA 2000 SBS modified bitumenadhesive. Caution: installing bothbase sheet and cap sheet in coldadhesive is not recommended.
PRECAUTIONSAs with any roofing project, safety
shall be a consideration. The use ofpropane fired roofing installation
equipment, molten asphalt and sol-vent based adhesives pose poten-tial fire and burn hazards.
Adequate protective clothing suchas work gloves, long sleeve shirt,long pants and durable, flat soledshoes should be worn.
The roofing contractor shall pro-vide safety training to all his per-sonnel covering, but not limited to:the use and storage of propane, safeinstallation procedures and safeworking habits. All procedures andtraining shall conform to local, stateand federal requirements.
When using COMPABASE APPand SBS modified bitumen basesheets it is recommended that onlybase sheet and cap sheet having
the same modifier be used together.Never mix an APP with an SBSmembrane, and vice versa.
*UL Type G2; ASTM D 4601-98, Type II
FS-40 FS-25 BFS-2H FS-2H-FR BETA BASE*MOP APPLIED MOP APPLIED MOP APPLIED MOP APPLIED MOP APPLIED
SBS SBS SBS SBS Oxid. Asphalt
65.6' x 3.28' 98.8' x 3.28' 49.2' x 3.28' 49.2' x 3.28' 108 x 36"
3" 3" 3" 3" 2"
200 ft2 300 ft2 150 ft2 150 ft2 324 ft2
Sand Sand Sand Sand Sand
Sand Sand Sand Sand Sand
1.5 mm 1 mm 2 mm 2 mm 1 mm
80 lb. 75 lb. 70 lb. 70 lb. 75 lb.
SpunbondFiberglass FiberglassPolyester
Fiberglass Fiberglass
240°F (116°C) 240°F (116°C) 240°F (116°C) 240°F (116°C) 210°F (99°C)
14°F (-10°C) 14°F (-10°C) 14°F (-10°C) 14°F (-10°C) N/A
Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.75.....60 75.....60 105.....80 80.....70 50.....55
Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans. Long. / Trans.6.....6 3.....3 50.....50 6.....6 2.....2
ADVANTAGES■ System compatibility
■ Two-Ply modified bitumensystem
■ Superior flexibility
■ Excellent weatherability
■ Easy to apply
■ Keeps your BITEC modi-fied bitumen roof system intotal performance
■ Warranty periods of up totwenty years
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B I T E C WA R R A N T I E S
SAMPLE
SAMPLE
SAMPLE
All warranties are “l imited”unless they are explained, termedor titled “unlimited” warranties. Anyone limitation makes a warranty“limited”. Most roofing manufactur-ers no longer provide “bonded”roofs, but furnish limited roof war-ranties. Most all roof warrantieshave a list of exceptions which“limit” their coverage.
BITEC offers several types ofwarranties. Limited MaterialWarranties (Material Only War-ranties) are available for 10 and 12year periods for all BITEC productsexcept ISA-4T and UDL-40. Thesewarranties are normally availableto the contractor or individual attime of purchase at one of our dis-tributors.
ISA-4T may only receive a 10year Limited Material Warrantyand may not be used within roofassemblies to receive a “Limited’Insured’ Warranty.”
UDL-40 is strictly for nailedunderlayment use with shingles,tile applications and some metalroof applications. No printed war-ranty is available for UDL-40.
Limited “Insured” RoofingWarranties for 10 and 12 year peri-ods are available for new con-
struction, reroofing or recover pro-jects using either BITEC modifiedsystems or certain BITEC BUR-MOD systems.
Limited “Insured” RoofingWarranties for 15 and 20 yearsare only available for new con-struction and reroofing where theexisting roof and insulation arecompletely removed down to theroof deck.
This will allow inspection andrepairs to the existing deck provid-ing essentially the same conditionsas new construction. These war-ranties are available for BITECmodified systems or certain BITECBUR-MOD systems.
Warrant ies for MINERALDESIGN products are covered bya different material only warrantyand depending on it’s use may becovered by one of the Limited“Insured” Roofing Warrantiesbecause it is essentially an APM-4T or SPM-4H product with theMINERAL DESIGN pattern ofgranule surfacing applied in lieu ofthe so l id co lors. MINERALDESIGN products are covered inother publications.
NDL, Full System and NDL/FullSystem Warranties are available
only on new construction or onreroof projects where the existingroof and insulation is completelyremoved down to the deck. Roofinsulation may not be reused forthese or 15 or 20 year roofs.
Contractors are responsible forinsuring that proper substrate con-ditions are provided for the type ofwarranty being requested.
BITEC Limited “Insured”Roofing Warranties can only beobtained by submittal of a WarrantyRequest from a BITEC AuthorizedApplicator. This is for approval,BEFORE the project begins. Theinstallation must be performed toBITEC published specifications,details and any addendum thereto.
Approval will be given providedall criteria for Warranty issuancehas been met. BITEC requires“Authorized” applicators to carryproper insurance coverage toreceive these warranties.
BITEC warranties are transfer-able only when approved by theManager of Technical Services.BITEC should be notified beforeany property ownership changes.For additional information call theBITEC Technical Services Dept. at800-535-8597.
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G E N E R A L R E Q U I R E M E N T Ssection 1.01
SECTION 1.00
HANDLING AND STORAGE
All BITEC modified bitumenproducts in roll form must be storedon end to prevent damage to rollends and prevent roll flattening.Rolls stored on their sides will flat-ten and stick together, makingthem very difficult to apply.
All BITEC membranes have pro-tective surfacings such as mineralgranules, films, sand or talc whichact as a release. Mineral surfacedproducts must be stored on endwith the selvage edge up awayfrom supporting surfaces. Rollsstored with the selvage edge downwill be difficult to apply due tocrushing of the selvage edge.
BITEC modified bitumen mem-branes must be stored under coverwith adequate ventilation untilimmediately before use, away fromweather and the elements. Shouldmembrane be stored on the jobsite, covering of the pallets isessential. Covering must be donewith a tarpaulin or similar cover-ing. (Black or clear coverings arenot acceptable).
It may become necessary to splitthe protective shrink-wrap bag cov-ering the rolls to provide ventila-tion in order to reduce the possi-bility of rolls sticking. It is advis-able to store all materials in ashaded area at the job site, even ifprovisions for covering and venti-lation have been performed.
Should any roofing materialbecome wet or damaged, thesematerials must not be used; theymust be replaced.
During cold weather, we sug-gest that membrane be storedinside a warm location until imme-diately before use. This will helpin the ease of application, and
reduce the potential of membranecoatings cracking during their han-dling and application.
BITEC recommends that rollsbe applied only when ambient tem-peratures are above 40°F for allAPP modified bitumen products,and 30°F for all SBS modified bitu-men products.
Nevertheless, application ofmembranes may be done belowthe recommended minimums, butcertain minimum precautions mustbe taken.
When application of membraneoccurs at lower ambient tempera-tures, the following precautionsmust be followed:
1) Never throw rolls of mem-brane on the deck or storage sur-face. Sudden impact of the roll cancause cracking of the modified bitu-men coating.
2) When torching, unroll themembrane slowly to ensure pro-per flow of the coating. (Adjustamount of heat coming frompropane torch accordingly.)
3) When mopping membrane,care must be taken to ensure thatthe mopping asphalt is of propertemperature for bonding mem-brane to substrate. See SECTION1.04 on Asphalt Temperatures.
4) Should difficulty in applica-tion arise after following theseinstructions, discontinue applica-tion until ambient temperature isabove minimums stated above forthe respective products. It is theRoofing Contractor’s responsibil-ity to make this decision.
BITEC recommends that pal-letized units of material be stackedone-high. Double stacking is notrecommended. However, if spaceis limited, APP products can bedouble stacked provided that aminimum 3⁄8" plywood sheet sepa-rates the units to prevent damage.
Under no circumstance should youdouble stack SBS modified bitu-men products.
All necessary precautions havebeen taken to insure that BITECproducts leave the plant in goodcondition. BITEC, INC. will not beresponsible for damage to prod-ucts due to circumstances andevents beyond our control; includ-ing damage in transit, storage atdistributors or contractors ware-houses or on jobsites.
SECTION 1.01
PHASINGThe practice of ‘phasing’ is not
recommended by BITEC underany circumstance. It is best toinstall the roofing system as oneunit.
If precipitation occurs beforecompletion of the roofing systembeing instal led, the RoofingContractor is responsible for seal-ing the unfinished roofing systemin a way to provide protectionfrom water, and not to interferewith the successful completion ofits installation.
The deck and roofing systemmust be completely dry beforework commences after precipita-tion or dew. Installing membraneover wet surfaces will void warrantyor disallow its issuance. Roofingover wet surfaces is not a goodroofing practice.
SECTION 1.02
ASPHALTStore all asphalt is such a way
as to prevent leakage, moisture orother contamination and/or dete-rioration of the carton.
BITEC will only allow the use ofASTM D312 Type III or Type IV hotasphalt for mop application.
SECTION 1.03
ASPHALT APPLICATIONBITEC specifies solid interply
asphalt mopping application at arate of 25 lbs. per 100 sq. ft. Allmoppings shall be continuous anduninterrupted so as not to allow feltto touch felt at any point.
BITEC will allow a variance inweight of asphalt application of +/-15% (21 lbs. to 29 lbs.), providedapplication is uniform, as previouslynoted.
It is required that the asphalt bemaintained at its proper tempera-ture for the specific products at thepoint of application.
For application of insulation, G2base sheets and fiberglass plysheets, follow EVT asphalt tem-perature guidelines.
Consult the respective asphaltmanufacturer for this information,which should be provided on eachcarton or by certificates with eachload of bulk asphalt.
Information should include man-ufacturer's name, batch number,heating temperature, flash point(FP), finished blowing temperature(FBT) and equiviscous temper-ature (EVT).
For modified bitumen membraneapplication follow the temperatureguidelines set forth in the follow-ing SECTION 1.04, ASPHALTTEMPERATURES.
Spot mopping attachment offiberglass base sheet should beperformed by placing 9" diametercircles 18" o.c. in all directions at arate of 15 lbs. per 100 sq. ft.
This is best accomplished with aspot mopping machine, otherwisethe application gets very erraticand in many instances may notproduce a truly spot mopped envi-ronment with small ribbons ofasphalt between spots.
This could cause blistering atlocations where voids occur andtrap moisture.
SECTION 1.04
ASPHALT TEMPERATURES
Asphalt chills rapidly once itleaves its container on the roof andhits any substrate. Therefore it isimportant to maintain the temper-ature as long as possible for properapplication purposes.
This asphalt serves the two-foldpurpose of providing not only thewaterproofing layers between rein-forcing plies in BUR-MOD systems,but it must also provide a highenough temperature to properlybond the different plies at theirinterface. For this purpose, EVTtemperature is adequate.
Hot asphalt application of ASTMType IV or Type VI fiberglass plysheets and ASTM D 4601 (ULType G2) fiberglass base sheetsrequires careful attention to EVTtemperatures. This information isusually provided on each carton ofasphalt or with paperwork on eachload. EVT temperatures may varywith each load or batch of asphalt.
Proper bonding of the SBS mod-ified bitumen membranes to oneanother or to other surfaces re-quires a higher temperature thanused with fiberglass ply sheets andtherefore published EVT tempera-tures are not usually high enoughto provide the proper bondingrequired. Asphalt used with SBSmembranes not only provides anadditional layer of waterproofingbut it must also provide the heatnecessary to properly bond theSBS surface to another surface.This type of bonding is an "adhe-sive" method as compared to "heatwelding" or "torching" which is a"cohesive" method.
Proper application of SBS mod-ified bitumen membranes requiresthe use of asphalt at higher tem-peratures, typically around 450°Fto 470°F at the point of application,with the asphalt application not pre-ceding the roll more than four tosix feet, depending on the ambi-
ent air temperature and wind con-ditions. The upper temperaturerange of asphalt cools much fasterthan the lower temperature range.
If the asphalt is not at the propertemperature at the point of appli-cation, the membrane may appearto be stuck, but not actually bebonded together properly andcould release some time in thefuture.
Proper asphalt application maytake days to completely cure sothat it cannot be peeled apart. DONOT TEST the application by peel-ing it apart for at least two days.
The following recommendationsfor using and heating moppingasphalt should be followed:
1) Type III - For slopes fromdead level up to 1" in 12" (1:12)
Application temperatures:
• Fiberglass base sheet and plysheets 390°F to 425°F
• SBS modified bitumen mem-branes 435°F to 470°F
2) Type IV - For slopes fromdead level - up.
Application temperatures:
• Fiberglass base sheets andply sheets 400°F to 475°F
• SBS modified bitumen mem-branes 445°F to 485°F
Machine application of asphaltmay require higher temperatures,as much as 25 degrees. Consultasphalt manufacturer for this infor-mation.
Asphalt should not be heatedabove its Flash Point (FP). Heatingabove the Finished Blowing Temp-erature (FBT) should be closelymonitored and only be done forshort periods of time, not to exceedfour (4) hours. Otherwise, theasphalt could experience “fallback”and/or become degraded.
Close attention to asphalt tem-perature is also of utmost impor-tance to provide the proper quan-tity of asphalt between plies. Jobconditions and equipment uses
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often make it hard to operate withinthe proper temperature window.However, this does not relieve thecontractor of the responsibility forproper application.
The quantity of asphalt per mop-ping is critical for several reasons.Too much asphalt can cause slip-page, while too little will not pro-vide an adequate waterproofinglayer.
Also, too little will not carryenough heat and will chill faster,resulting in lack of proper fusion ofinterfacing surfaces. In addition tocausing slippage, too much asphaltwill cause the waterproofing lay-ers to be less flexible which cancause cracking of the asphalt layerwhich in turn can cause splitting ofthe entire membrane system.
SECTION 1.05
CUT BACKS,EMULSIONS AND
REFLECTIVE COATINGSThe use of “cut back” cement,
coatings, plastic cement or adhe-sives is prohibited when installingany BITEC modified bitumen mem-brane.
Emulsions may be used pro-vided emulsion manufacturer’sapplication instructions are strictlyadhered to.
Any reflective coating used as asurfacing over BITEC membranesshall be one that is approved byBITEC. For a list of currently ap-proved coatings, contact BITEC’sTechnical Services Department fordetails.
Allow membrane to weather aminimum 45 days before surfacingis applied.
SECTION 1.06
CANTSCant strips are required on all
roofing installations. Fire retardantcant strips are recommended.
SECTION 2.00
ROOF MEMBRANEINSTALLATION
BITEC modified bitumen roof-ing systems should be applied inaccordance with BITEC specifica-tions and construction details pro-v ided here in , or as may beapproved in writing as special con-ditions arise. Installation should bedone without phasing.
SECTION 2.01
TEMPORARY ROOFSWhen conditions exist in the
field prohibiting the total comple-tion of the system, the designer,general contractor, building owner,architect and roofing contractorshould consider the use of a tem-porary roof.
The temporary roof should con-sist of a minimum two (2) plies offiberglass base sheet. Fiberglassply sheets are unacceptable foruse in temporary roofs. Type andnumber of plies will depend uponlength of time involved before thepermanent system is installed.
BITEC reserves the right toaccept or reject the use of a tem-porary roof as a vapor retarder inthe permanent roofing system.
SECTION 2.02
BASE SHEET FASTENINGREQUIREMENTS
First ply of the BITEC roofingmembrane system must consist ofat least one (1) ply UL listed TypeG2 fiberglass base sheet.
The base sheet should beinstalled with minimum 2" side and4" end laps. Base sheet should bemechanically fastened to nailablesubstrates 9" o.c. along the 2" sidelap, and 18" o.c. in two rows, stag-gered, 12" in from each edge withapproved fasteners.
Non-nailable or insulated sub-strates also require the use of aUL Listed G2 fiberglass basesheet, either solid or spot moppedwith asphalt as required by BITECroofing system specifications.
The roofing contractor shouldinstall base sheet in such a way asto maintain 6" minimum offset ofend and side laps of the base andBITEC finishing membranes.
The base sheet must besmooth, completely dry, welladhered and free of debris prior toapplication of the modified bitumenmembrane.
SECTION 2.03
BITEC MODIFIEDBITUMEN MEMBRANESOver the base sheet install one
(1) ply of BITEC modified bitumenmembrane with the specified sidelaps and minimum 6" end laps. Endlaps should be diagonally stag-gered and offset a minimum 3' fromthe preceding membrane end lap.Application of the membrane andbase sheet should begin at the lowend of the roof.
Layers of successive base sheetand membrane should be appliedperpendicular to the slope on roofsbelow 2:12 slope for APP (1:12 forSBS) and parallel to the slope forroofs greater than 2:12 (1:12 forSBS).
For either membrane, parallelapplication requires backnailing.See section 3.01.
Torch Application:
BITEC modified bitumen mem-branes having “T” as an ending,(such as APS-4T), and their relatedflashing rolls are designed fortorch application only.
Procedure for installing thesemembranes is as follows:
1) Unroll the membrane com-pletely and align properly.
2) Re-roll one end of the rolltightly, about half way, maintaining
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proper alignment.
3) Torch apply the re-wound por-tion of the roll. Heat should beapplied evenly across the face ofthe roll, and up the previouslyinstalled membrane’s top surface(where the side lap is formed) inan “L” configuration. While heating,unroll the roll with uniform down-ward pressure. An indication thatthe torchable surface has reachedthe desired welding temperatureis the observance of the film burn-off sheet melting, leaving a glossysurface of modified coating to bebonded to the substrate. If flow ofmodified coating is observedbefore contact with the substrate,the welding temperature is toogreat. Welding temperature is cor-rect when flow from all seams is1⁄8" to 1⁄2". Too much flow indicatestoo much heat; while no flow indi-cates too little heat.
4) Rewind the balance of the rolland proceed as described above.End laps should be a minimum 6"in coverage and staggered a min-imum 3' from the preceding course.
5) During end lap application,the underlying membrane’s loweroutside corner, at the end of theroll, should be trimmed. Then, fol-low with the overlapping mem-brane. This is also known as the“T” jo int . Corners should betrimmed at an angle 51⁄2" long fromend of roll to outside edge. Width oftrim should be 3" for productsrequiring 3" side laps, and 4" forthose requir ing 4" side laps.Succeeding courses should com-pletely cover all trimmed edges.Apply trimmed rolls to provide afull 6" end lap.
6) BITEC does not recommendthe use of mechanical torchingwagons for application of mem-brane.
7) All end and side laps shouldbe checked at the end of the workday for proper bonding. Areas nothaving the proper bond, or requiredflow from seam, should be repairedby gently lifting the lap with a pre-
heated round nose roofer’s trowel,re-heating the area with a torchand applying pressure to the lapforcing the molten bitumen out.Never attempt to repair laps byheating the top surface of themembrane.
Hot Mopped Application:
BITEC modified bitumen mem-branes having “H” as an ending,(such as SPS-3H) are designedfor application with hot asphalt. Theroofing contractor must not allowmopping asphalt temperatures tofall below the recommended appli-cation temperature, for the partic-ular asphalt, at the point of appli-cation. The roofing contractor mustnot overheat the asphalt to com-pensate for rapid cooling.
1) Over the installed fiberglassbase sheet, install BITEC hotapplied modified bitumen mem-branes in a continuous and unin-terrupted mopping of specifiedasphalt. Moppings should be aminimum of 25 lbs. per 100 sq. ft.The mopping asphalt must beapplied uniformly across the fullwidth of the roll, including the sel-vage edge of preceding layers.
2) A small amount of asphaltshould extend beyond the end andside laps to ensure full bonding.
3) Correcting unbonded laps isthe same as for torch applied prod-ucts, using a preheated trowel.
Cold applied adhesives areprohibited for the purpose ofrepairing laps or seams. Plasticcement is prohibited for use withany BITEC modified bitumenmembrane system.
BITEC DOES NOTRECOMMEND “FLYING-IN”
OR “MOP AND FLOP”METHODS OF APPLICATION.
SECTION 2.04
FIRE-RATED MEMBRANESSFM-3.5H-FR, SFM-4H-FR
These membranes are polymer
modified waterproofing mem-branes, composed of carefullyselected asphalts with superiormodifying characteristics andblended with high-quality SBS rub-ber, reinforced with a high-strengthfiberglass mat.
They are mineral surfaced andincorporate a smooth, even appli-cation of fine sand on the back sur-face to prevent blocking of rolls andto provide a smooth, acceptableapplication surface.
Special Formulation gives "FR"membranes a degree of fire resis-tance to effectively pass the ULClass “A” testing without the useof additional surfacings or protec-tive coatings.
Systems require a minimum ofone UL TYPE G2 fiberglass basesheet, such as BITEC Beta Base,for UL Class “A” rating, for bothnon-combustible and combustibledecks.
These membranes can beapplied by using hot asphalt or byusing any BITEC approved elas-tomeric cold process adhesive.(When using cold adhesives, fol-low specific adhesive manufac-turer’s installation specifications.)
Refer to the most recent ULRoofing Materials & SystemsDirectory for fire classifications.
Packaging:
Palletized units contain 20 rollsof FR waterproofing membrane.Each unit is shrinkwrapped in aspecial polyethylene bag for sta-bility and each pallet bears the ULLabel. BITEC recommends thatunits of material be single stacked.
SECTION 2.05
BASE FLASHINGSBITEC requires base flashings
backed up by a fire retardant cantstrip at all transitions from a flatroof to walls or curbs. Base flash-ings should be a minimum of 8"high, which has been an industry
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standard for many years.
Metal Base Flashings are notacceptable.
Base flashings for all two-ply, 10or 12 year systems should consistof at least one additional ply of thesame material as the cap sheetmembrane used. For wood wall orcurb construction, an additional plyof base sheet is required also.
For multi-ply membrane sys-tems, the base flashing must con-sist of at least an additional ply ofboth the interply membrane(s) andthe cap sheet membranes beingused.
Base flashings should be con-structed with 6" vertical laps every36" maximum. This makes thebase flashings stronger and eas-ier to install correctly.
If flashings are constructed withmembranes installed parallel to thewall or curb surface, lengths offlashings should be cut to no longerthan eight (8) feet.
Mop and flop installation of baseflashings is not recommended.They should be either torched ormopped in place, or SBS flashingsmay be installed in SBS modifiedflashing mastic.
BITEC SPM-4.5T must be torchapplied and may be used with anyasphalt built up roof or BITEC SBSmembrane.
BITEC does not issue a sepa-rate “flashing endorsement.” Onwarranteed projects, base flash-ings up to a maximum height of24" are included in the warranty.Flashings over 24" high are con-sidered wall flashings and are notcovered by the membrane war-ranty for that project, unless specif-ically covered by a special agree-ment.
More information about flashinginstallation is available in the sup-plementary pocket size publica-tion, “Flashing and ApplicationGuide”.
SECTION 2.06
CONSTRUCTION DETAILS
BITEC flashing rolls are spe-cifically designed for use with fullrolls of the same type. Flashingrolls come in 1⁄2 and 1⁄4 roll widths.Application is the same for flash-ing rolls as it is for full rolls of thesame type.
Prior to flashing roll application,vertical concrete or masonry sur-faces require preparation. Preparethese surfaces by applying asphaltprimer, conforming to ASTM D41,at a rate of 1⁄2 gallon per 100 sq. ft.
Primer must completely drybefore application of flashing mem-brane commences.
Wood surfaces should receiveone ply fiberglass base sheetnailed 8" o.c. with capped nails.
All flashings should extend aminimum of 8" above the roof deck,and be nailed 8" o.c. with cappednails, along the top edge.
Pipe flashings, flashing pans andother metal flashings must have aminimum 4" continuous flange. Allmetal flanges must be cleaned toremove residual oils and lightlyprimed with asphalt primer, con-forming to ASTM D41, prior toinstallation.
Primer must completely drybefore application of flashingmembrane commences. (Seeconstruction details 1 thru 32 onpages 32-53.)
SECTION 2.07
COATINGS AND SURFACINGS
It is considered a good roofingpractice to coat all smooth surfaceroofing membranes.
With mineral surfaced mem-branes, protective coatings are notnecessary unless it is required bycode or through testing with inde-
pendent laboratories such asUnderwriters Laboratories, Inc.
Refer to UL and FM publicationsto ensure system meets require-ments as spec i f ied by coderequirements. Roof coatings shouldbe applied in two (2) even appli-cations, except when specified oth-erwise by coating manufacturer.
BITEC SPS-3H will require aBITEC Approved Coating, or floodcoat and gravel for UV protection.Roof coating should be maintainedthrough the life of the system.
When design requirements callfor additional surfacing to satisfyparticular aesthetic or fire resis-tance properties, BITEC recom-mends the use of the followingguidelines:
Gravel or Slag:
Surfacing should be opaque,clean, with moisture content of 2%or less and conform to ASTM1863-93. Slag or gravel should be1⁄4" to 5⁄8" in diameter applied in aflood coat of ASTM D312 Type IIIasphalt.
Asphalt flood coat should beapplied at a rate of 60 lbs. per 100sq. ft. Uniform application of floodcoat is mandatory. Slag or gravelshould be applied at a rate of 400lbs. per 100 sq. ft., or as may berequired for adequate coverage.
Consideration must be givento ensure that roof load does notexceed building’s structuralcapacity.
Asphalt Emulsions:
Following surface preparation,apply one coat of asphalt emulsionto the entire membrane and verti-cal surfaces, at a rate of 3 gallonsper square, unless otherwise indi-cated by the specific emulsionmanufacturer’s installation specifi-cations.
Apply emulsion using a brush orspray applicator, brushing or spray-ing towards laps. A minimum of45 days must elapse before theemulsion is applied.
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Aluminum Coatings:
For best results, the BITECapproved reflective coating shouldbe applied in two uniform appli-cations. However, BITEC recom-mends that the specific coatingmanufacturer's installation proce-dures be strictly followed.
When considering UL Fire-Rated systems and products, con-sult the UL Roofing Materials andSystems Directory for individualsystem requirements.
A minimum of 45 days mustelapse before the reflectivecoating is applied.
SECTION 3.00
NAILABLESUBSTRATE DATA
It shall be the designer’s respon-sibility, not BITEC, INC.’s respon-sibility, to consider wind conditionsin the roofing projects’ geographi-cal area.
Current Factory Mutual LossPrevention Data Sheets 1-7; 1-28;1-28R; 1-29; 1-29R and 1-49, etc.,give information and requirementson proper fasteners and methodsof installation.
We recommend that the de-signer conduct jobsite fastener“pull-out” tests in order to deter-mine the most suitable fastener fora specific application.
Responsibility rests with thedesigner, and not BITEC, for thisdetermination, and for determin-ing which fastener to use. Wherenails are used as fasteners, theymust be capped nails with eitherspiral or annular r ing shanks.Smooth shank nails are notacceptable.
BITEC wi l l not assumeresponsibility for failure or dam-age of the roof system result-ing from either fastener or deckmaterial failure, or assume anyresponsibility for their perfor-mance.
SECTION 3.01
STEEP SLOPEFASTENING REQUIREMENTS
BITEC membranes applied onslopes exceeding 2:12 for APPmembranes and 1:12 for SBSmembranes should be installedparallel to the slope and fastenedas followed:
Nailable Substrates:
Base ply should be mechanicallyfastened as specified in selectedBITEC roof system specifications.Install BITEC modified bitumenmembrane as specified, blind nail-ing end laps 2" in from top edgeand 6" o.c. with capped nails orother suitable fasteners.
Insulated Substrates:
Fiberglass base sheet should beapplied to the insulation in accor-dance with insulation manufac-turer’s specifications provided itdoes not conflict with applicationstatements set forth herein.
Base ply should be fastened towood nailers or through the insu-lation to the deck, 8" o.c.. Instal-lation of the modified bitumenmembrane should proceed asspecified, blind fastening end laps2" in from top edge and 6" o.c.through su i table fasteners.Maintain 6" end lap seal beyondfastener plates.
SECTION 4.00
GENERALDESIGN CRITERIAFOR ROOF DECKS
All substrates which are sched-uled to receive BITEC modifiedbitumen membranes and roofingsystems shall be smooth, clean,completely dry and free of sharpprojections and depressions.
Roof decks shall be constructedin accordance with the deck manu-facturer’s specifications, or applic-able industry practices, local codes,
and shall be designed to supportlive and dead loads, both duringand after construction, withoutexcessive deflection or movementbetween deck components.
Decks should also be designedand constructed to resist wind upliftforces anticipated in the area, andprovide satisfactory base to whichthe roofing can be attached.
It is not the responsibility ofBITEC to insure that the deck pro-vides a proper substrate for theroof system.
All decks must be prepared forretrofit as specified herein, beforeapplication of BITEC products.
The responsibility for roofdeck system design and roof-ing system selection, includingvapor retarder, roof insulationand expansion joints, lies withthe architect, engineer, ownerand not with the roofing con-tractor or roofing materialsmanufacturer.
BITEC personnel are availablefor consultation regarding substratesurface over which the membraneis to be applied.
Care should be taken to setdrains and outlets in the roof ’sexpected or designed low areaswith consideration to structural sup-ports positioning and anticipatedbuilding settling.
Drain f langes shal l berecessed flush to deck surfacesto provide positive drainage andprevent water damming at rims.
A minimum slope after con-struction of 1⁄4" in 12" (1⁄4:12) is rec-ommended. Roof deck shall pro-vide positive drainage, with out-lets installed to completelyremove water within 72 hoursafter the rain stops.
Installation of conduits or pip-ing above the deck and under theroofing membrane is prohibited.Condui t or p ip ing should beplaced under the roof deck orabove the completed roofing sys-
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tem, properly suppor ted andflashed to prevent damage to theroof system.
All openings and projectionsthrough the deck should be com-pleted prior to installation of theroofing system. Acceptance of aroof deck to receive the BITECmodified bitumen membrane sys-tem refers only to deck surface.
When reroofing, all existingbase flashing and metal flashingsmust be replaced for acceptanceand potent ia l i ssuance o f aBITEC Warranty.
SECTION 4.01
EXPANSION JOINTSExpansion joints should be
installed along the entire length ofthe expansion joint, continuing fullyto the roof deck edge or perime-ter. Low profile, preformed elasticexpansion joints with sheet metalflanges should not be installed ona flat roof deck.
These expansion joints shouldbe installed by fully fastening towood nailers placed on each sideof the expansion joint, with accom-panying tapered edge strips to pro-vide smooth transition onto the fieldof the roof.
Conventional wood curb expan-sion joints should extend a mini-mum 8" above the roof surface.
Criteria which dictates the useof expansion joints are as follows:
1. Where the structural designand/or deck changes direction.
2. Where deck types change:steel deck to concrete deck, or lightgauge steel on short spans toheavy gauge steel on long spans.
3. Where the design configura-tion creates separate wings, suchas: “T”, “L”, or “U” configurations.
4. At bu i ld ing addi t ions,canopies, and exposed overhangs.
5. At adjacent building sectionsthat are kept at drastically different
temperatures.
6. In reroofing; at the obviousareas of stress concentrationswhich have caused splits in exist-ing situations.
7. Drainage design factors.
Area dividers should not be con-sidered as replacements for expan-sion joints. The designer shouldalways consider the effects ofexpansion joints and area dividerson roof drainage as required.
The architect or engineer isresponsible for determininglocation, number and type ofrequired roof deck expansionjoints and/or roof area dividers.
SECTION 4.02
VAPOR RETARDERSA vapor retarder is not consid-
ered part of the roofing mem-brane. The decision to use avapor retarder rests with thedesigner, architect or engineer,after careful consideration ofdesign and environmental crite-ria, including relative interiorhumidity, interior temperature,type of construction, buildingoccupancy and exter ior coldweather temperature variables.
As a guide, vapor retarders aregenerally used where averageJanuary temperatures are 40°F orbelow and winter season interiorhumidity is 45% or greater. Thetemperature at the vapor retardermust be warmer than the dew pointtemperature to prevent condensa-tion from occurring.
Constructions having insulatedceilings below the deck requirespecial attention to design and dewpoint calculations.
If a vapor retarder is incorpo-rated into a roof system, one-waypressure release vents should beinstalled at the rate of one (1) ventper 1000 sq. ft. of roof area to im-prove venting of water vapor whichmay become entrapped after theconstruction of the roof system.
Remove insulation from the areadirectly under the vent opening andrefill with loose insulation prior tothe vent placement and subse-quent flashing.
The following guidelines areimportant to the satisfactory per-formance of the vapor retarder, andtotal roofing system:
1) Application techniques andall components of the vapor retar-der used must be compatible withselected roofing system.
2) Vapor retarder should pro-vide a permeability rating close to0 perms.
3) Adequate adhesion proper-ties, to meet design requirementsfor wind uplift resistance, must beprovided by the vapor retarder;especially in the absence of me-chanically fastened insulations.
4) Vapor retarders should befully sealed at all end and side laps,securely flashed to roof top pene-trations, and folded on top of roofinsulation a minimum of 6" at theperimeters.
5) Designers of the roofingsystem should consult withFactory Mutual and UnderwritersLaboratories for fire resistanceand wind uplift ratings. BITEC,INC., expressly states that thecompany will not accept anyresponsibility for damage to, orfailure of the roofing systemcaused by the use, or theabsence of a vapor retarder.
Note: Fiberglass roof insulationsshould not be used as a ventingstrata over known wet or dampsubstrates; whether new con-struction, or retrofit.
Note: Items in systems whichmay require vapor retarders are:
a) Lightweight insulating concrete
b) Gypsum fills
c) Wood decks
d) Pressurized plenums
e) Concrete
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SECTION 4.03
PRESSURIZED PLENUMSConsiderat ion for a vapor
retarder is necessary here. Thiswill prevent induced vapor trans-mission through a vented substrateinto the roof system.
SECTION 4.04
CONSTRUCTION DETAILS
Selection and design of roof topflashings is critical to the total roofsystem’s performance as well asthe flashings application. Verticalsurfaces, metal and wood curbs,mechanical equipment platformsand supports, roof top accessoriesand other penetrations must bestructurally sound, firmly attachedand prepared to receive the BITECmodified bitumen membrane flash-ing system.
A pressure treated wood nailer,having a minimum width of 41⁄2",should be installed at all eaves,gable ends, and deck openings inthe roof for securement of the roof-ing membrane, roof fixtures andmetal flashings. Wood nailersshould be the same thicknesswhen roof insulation and/or taperededge strip is specified.
BITEC does not recommend theuse of pre-formed metal curbs hav-ing horizontal metal flange of lessthan 4" in width when built into theroof membrane.
All metal roof flanges must beprimed, both top and bottom, withan asphalt primer that conforms toASTM D41 criteria. Primer mustbe allowed to dry thoroughly beforeinstallation. Roof flange must besecurely fastened.
Mechanical equipment shouldbe installed before application ofthe roofing membrane is performedto reduce the potential of damag-ing the membrane.
Roof edge metal f lashings
should be installed in accordancewith FM Loss Prevention DataBulletin 1-49 as a minimum, forprotection from wind damage orloss.
Base flashings should only beadhered to walls, curbs or nailerswhich are supported by the samestructure as the roof membrane.Otherwise, differential movementbetween structures can cause split-ting or deterioration of the mem-brane flashing.
Some base and penetrationflashings shown in this manual arefor 2-ply systems only. Other multi-ply systems require additional pliescommensurate with system beinginstalled. Refer to section 2.05.
SECTION 4.05
OTHER DESIGN CRITERIA
BITEC recommends that theroof installation be delayed untilsuch time that all other trades havecompleted work which requiresadditional traffic across the deckor membrane.
Roofing contractors should mon-itor newly installed roofs for dam-age when it is known or suspectedthat other trades have performedwork over completed roofs.
Specifiers, designers and con-tractors should consider the use ofa temporary roof membrane whenactive traffic during roofing systeminstallation is inevitable.
The installation of any type ofmechanical equipment on the roofshould be avoided whenever pos-sible. However, when equipmentis mounted on the roof, it shouldbe mounted in accordance toNRCA designs, but not limited tothose included in this manual.
Walkways
Whenever roof mounted equip-ment will require frequent traffic forinspection or servicing, an addi-
tional protective layer of BITECmineral surface membrane isrequired. It should be installed soas to denote, a walkway and/orwork area.
When walkway materials otherthan BITEC membrane are speci-fied for use, an additional protectivelayer of BITEC membrane is alsorequired. Other materials shouldnot be loose laid or adhered to theBITEC main roof membrane.
Walkway materials should beinstalled in short sections not over6' long with minimum 6" spaces topermit proper drainage.
BITEC recommends the use ofa contrasting color for walkwaymaterials to promote the use of thedesignated walkway to keep rooftraffic to a minimum in unprotectedareas.
When elevated walkways areinstalled on wood blocking or othermaterials, an additional protectiveply of BITEC membrane must beused at each support location forthe elevated walkway.
SECTION 5.00
ROOF DECKSAn acceptable roof deck surface
is considered as being one whichis clean and free of debris, smooth,completely dry and structurallysound. All penetrations, curbs,walls and other flashing detailsshould be in place, ready to receivethe roofing system before installa-tion commences. Roof accessoriesshould be available before the roof-ing contractor begins work.
SECTION 5.01
STEEL DECKSSteel decks should be 22 gauge
minimum, and comply with gaugeand span requirements as set forthby deck manufacturer, and installedin accordance with all other indus-try standards and current FM Loss
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Prevention Data Bulletin 1-28.Refer to FM 1-29 for minimumthickness requirements for varioustypes of roof insulation. Refer toBITEC Insulation Section for properattachment of insulation and roofmembrane.
Steel deck side laps should bemechanically fastened with self tap-ping screws at mid-span betweenbar joists or suppor ts. Spansexceeding 6' should receive two(2) fasteners at the side lap. Endlaps should be staggered to pre-vent buildup of side laps at cor-ners, therefore preventing highspots over which insulations are tobe laid.
All fasteners should be checkedbefore installation of roofing mem-brane to ensure functionability.BITEC recommends use of non-corrosive fasteners approved byFactory Mutual, and/or the insula-tion manufacturer, when insulationis installed over steel decks. (Referto “Fasteners” page 31.)
All steel decks should be cov-ered with a mechanically fastened,acceptable roof insulation board.
SECTION 5.02
POUREDSTRUCTURAL CONCRETE
All surfaces shall be smooth andvisibly dry. Wood nailers shall beinstalled into the deck to providefor securement of the roofing mem-brane flashings at perimeters, pen-etrations and other deck openings.
The deck is then prepared bypriming with an asphalt primer con-forming to ASTM D41 criteria,which is allowed to completely drybefore application of the roofingsystem insulation or fiberglassbase sheet.
BITEC does not allow single plymodified bitumen membrane appli-cation directly over concrete decks.Fiberglass base sheet should beinstalled to the concrete deck by
mechanical attachment, spot mop-ping or strip mopping. Fully adher-ing base sheet to the concretedeck is prohibited.
One way vents are required overall concrete type decks.
SECTION 5.03
PRE-STRESSEDOR “T” SECTIONS
Set or camber should not allowponding of water. Offsets betweenunits should not exceed 1⁄8".Surfaces which are uneven aredeemed unacceptable. Suitablefill should be given to all unevenfits, and sections leveled beforeroofing system is applied.
A leveling course of roof insula-tion should be installed prior toapplication of membrane system.To prevent bitumen drippage, deckjoints must be taped prior to appli-cation of roofing system. Refer toInsulation Section for properattachment of insulation and roof-ing membrane.
SECTION 5.04
LIGHTWEIGHTINSULATING CONCRETECaution - This deck contains a
large percentage of moisture,therefore adequate precautionsmust be taken to avoid anyentrapment of moisture underthe roof system.
The following guidelines are rec-ommended by BITEC concerningthe lightweight insulating concretedeck acceptance before installingmembrane:
1) Decks having a density of lessthan 22 lbs. PCF, 1:6 mixture (min.compressive strength of 125 psi)are unacceptable.
2) A minimum of 2" top surfacingfill is recommended.
3) Deck must provide a mini-mum 40 lbs. withdrawal resistance
for the selected approved mechan-ical fastener at the time the roof-ing system is installed. It is theresponsibility of the roofing con-tractor, architect or engineer torequest and review testing for fas-tener withdrawal strength. BITECmerely recommends withdrawaltests be done; it’s good roofingpractice.
4) During curing or application,the deck must not be subjected totemperatures below 40° F. Frozendecks must be replaced.
5) Drying time shall be as perdeck manufacturer’s specifications.
6) Lower moisture, quick dryinglightweight fills may require lessdrying time.
7) Surface must be smooth, vis-ibly dry, free of debris, sharp pro-jections and depressions.
DECK MANUFACTURER ANDAUTHORIZED APPLICATORMUST PROVIDE ALL PARTIESCONCERNED WITH A LETTEROF CERTIFICATION STATINGTHE DECK IS READY TORECEIVE ROOFING SYSTEMAND THAT DECK COMPLIESWITH THE ABOVE MINIMUMREQUIREMENTS.
After installation of the roofingsystem, the General Contractorshould provide ventilation to pre-vent interior moisture from infil-trating the deck during construc-tion, until occupancy by owner.
Additional Insulation
When additional insulation is tobe installed over lightweight decks,a UL Type G2 or G3 fiberglassbase sheet must be mechanicallyfastened to the deck. BITEC doesnot recommend direct attach-ment of roof insulation boardsto this type of deck. Additionalinsulation may be hot mopped tothe fastened fiberglass base sheet.
Installation of the RoofingSystem
Fiberglass base sheet should be
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installed with mechanical fasten-ers only, over this nailable sub-strate. Fasteners must be of a typeand size approved by BITEC, andthe deck manufacturer. Refer toFM publications for type and instal-lations requirements in order toobtain proper wind uplift resistancerequirements.
Pressure Relief Vents
A 4" minimum diameter pressurerelief vent, with 4" minimum flangesand weather resistant hood, shallbe installed 20 ft. in from perimeteredges. Pressure relief ventsmust be of a one-way design.Thereafter, pressure relief ventsshall be installed 30 ft. o.c. locateddirectly over 4" diameter openingscut through the roof system anddown to insulating fill.
Caution: Insulating concretefills over existing roofs, concretedecks or decks without ventingare not acceptable. Lightweightdeck fills installed incorporating theuse of Insulperm or other EPSinsulations full of holes and usingthe new low moisture content deckmixes over unvented steel decksor concrete decks will qualify as adeck suitable for installing a BITECmembrane to be warranteed.BITEC does not recommendinstalling these decks over exist-ing roof membranes.
BITEC wi l l not accept anyresponsibility for damage or failureof the roofing system caused inany way by the lightweight insulat-ing concrete deck or fill, or failure tofollow instructions set forth withinthis publication.
SECTION 5.05
WOOD PLANK DECKSOn wood decks, to prevent bitu-
men drippage, install dry sheathingpaper. A nominal thickness of 1"is required for the wood planks.Knotholes shall be covered withmechanically fastened sheet metal.
SECTION 5.06
PLYWOOD DECKSPlywood decks should have a
nominal thickness of 1⁄2" and be amin. 4-ply plywood, APA marked,exterior grade.
All four sides of each pieceshould bear on and be securelynailed, or fastened to joist andcross blocking. In the absence ofcross blocking, two-ply clips per24" max. joist spacing, should beused.
Only wolmanized lumber shallbe used for blocking. The use ofpetroleum treated lumber isstrictly prohibited.
A divorcing layer of rosin paperor sheathing paper is optional. Oneply of UL Type G2 fiberglass basesheet is required to be secured bymechanical fasteners.
BITEC will not be responsible inany way for damage to the roofingsystem should this deck fail.
NOTE: For warranty periodsbeyond 10 years, a minimal layer of1⁄2" insulation may be required.
SECTION 5.07
POURED GYPSUM DECKS
To accommodate approved fas-teners used to attach base ply orinsulation to this type of deck, referto Factory Mutual publications forspecific fastener and fastenerapplicability.
Do not apply any roofing sys-tem by adhesion with hotasphalt, cold applied adhesivesor by heat welding to this typeof deck.
Deck surface must be smooth,clean and visibly dry, free of pro-jections and free of depressions.
Poured Gypsum decks requireone-way vents.
SECTION 5.08
STRUCTURALWOOD FIBER DECKS
Before roofing system applica-tion on this type of deck, the deckmust be in proper condition.
Where elevation of deck jointsvary, the deck erector must levelthe joints with screed coat mater-ial as recommended by deck man-ufacturer.
The deck erector must furnishwritten certification that the deckmeets job specification and deckmanufacturer’s requirements.
Each joint or tongue and groove,should be stripped according to thefollowing steps:
Apply a bead of plastic cementover the joint, then cover the jointwith a 6" wide strip of fiberglassbase sheet, centered over the jointand adhered to the plastic cement.
Apply fiberglass base sheet inlengths not to exceed 18', with 2"side laps, and 4" end laps, end lapsnot less than 3' apart, diagonallystaggered.
Mechanically attach fiberglassbase sheet 9" o.c. along the 2" sidelap; 18" o.c. in two staggered rows12" in from both sides.
A layer of roof insulation overthis base sheet is required. Then,install the membrane system asspecified.
BITEC assumes no responsi-bility for failure of the roofing sys-tem or damage caused in any wayby structural wood fiber decks, orfailure to follow instructions setforth herein.
SECTION 5.09
OPEN BEAM CEILINGSOver open-beam ceilings, the
insulation shall be covered with1⁄2" thick mechanically attachedplywood.
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SECTION 5.10
WOOD NAILERSPressure treated wood nailers
of 41⁄2" minimum width should beinstalled by others at all eaves,gable ends and openings in theroof for securing of roof plies,gravel stops, edging and roof fix-tures. The use of petroleumtreated lumber is strictly pro-hibited.
Solid wood blocking of treatedlumber is required for all insulationstops, metal edge flashings, andall other metal flanges built into theroof membrane.
SECTION 6.00
REROOFING PREPARATIONAND FIELD CONDITIONSThe following requirements shall
be used in conjunction with goodroofing practices to qualify theassembly for issuance of anyBITEC workmanship and materialwarranty:
1) Test cuts shall always betaken from an existing roof systemfor determination of deck type andvapor retarder, insulation type, con-dition and attachment; number ofmembranes installed, their typeand condition; and for presence ofmoisture within the system.
2) Deck shall be completely dryand structurally sound.
3) Parapet walls, perimeteredges, equipment or other loadbearing supports, platforms, curbs,etc., shall be structurally sound.
4) Additional weight of selectedroof systems shall not exceed safeload design.
5) Existing plywood decking nothaving continuous solid end block-ing, and decking less than nomi-nal 1⁄2" thick, is not an acceptabledeck. Depending on deck rigidity,an additional layer of roof insula-tion may be required.
6) Surface to receive new roofingsystem shall provide for positivedrainage.
7) Existing roof insulation shallbe dry and firmly attached.
8) Existing roof system shall becompatible with the new roofingsystem.
9) Existing membrane shall becompletely dry, clean and free ofdebris, with all surface defectsrepaired.
10) Existing roof system withaggregate surfacing should be tornoff. When gravel is removed forrecovering, a mechanically attac-hed 1⁄2" min. thickness recoverboard shall be installed.
11) Replace all existing metalflashings which build into the roofmembrane.
12) All existing metal counter-f lashing or coping should bereplaced to match existing, as acondition of Warranty compliance.
13) Expose entire metal flangeof all drains. Sheet metal drainsunsuitable for reuse shall beremoved and replaced to matchexisting. Clean and save clamprings for re-use; broken clamp ringsmust be replaced. Stripped or bro-ken bolt holes shall be drilled andretapped.
14) Abandoned equipment shallbe removed and decking requiredshall be installed to match exist-ing decking.
15) Height and/or clearance offlashings at membrane termina-tions shall be in accordance withconstruction details.
16) Base and wall flashingsshall be removed when loose, orwith insufficient clearance undercounterflashing to receive newroof system.
17) All roof penetrations shouldhave metal flashings.
18) Joints in masonry copingsshould be recaulked and/or re-grouted as needed.
19) Equipment vibration must becorrected.
20) Membrane to receive woodblocking pipe support shall be rein-forced with an additional ply ofmodified bitumen membrane, iden-tical to the membrane used as thecap sheet.
21) Condensate lines shall ex-tend to the drains.
22) BITEC recommends thatwhen retrofitting any existingcoal tar pitch roof, a divorcingor separation layer of either ply-wood or insulation of 1⁄2" mini-mum thickness be installed overthe existing roof prior to appli-cation of fiberglass base sheetand finishing membrane.
WARNING: coal tar pitch isnot compatible with any BITECmodified bitumen membrane.
23) The divorcing layer shall bemechanically attached. Refer toFM publications for mechanicalattachment to meet FM wind upliftrequirements.
Since all field conditions cannotbe covered in this specificationbook, and due to the complexity ofpreparing reroofing specifications,BITEC offers assistance in speci-fication selection and preparation.
Reroofing projects may qualifyfor Warranty when all installationand procedural criteria are met.
NOTE: SUBSTRATES WITHTWO (2) OR MORE ROOFS ARENOT ELIGIBLE FOR CERTAINWARRANTIES.
SECTION 6.01
ADDITIONALPRECAUTIONS
Existing roof surface - Over anexisting roof surface proper prepa-ration of the surface is essential.Blisters, splits, undulations, etc.,must be repaired in accordancewith good roofing practices.
Note: Direct application of anyBITEC waterproofing membrane
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to the existing deck or membraneis not recommended.
Defects in the existing roof sys-tem such as cracks, crazing, dete-riorated bitumen, and moisture cancause failure or damage to themembrane system. Conditionsarising from the above will resultin nullification of the Warranty.
All existing metal flashing mustbe replaced if existing metal isfound to be damaged or deterio-rating. Metal flashings must beprimed with an asphalt primer, con-forming to ASTM D41 criteria,before membrane is applied.
SECTION 6.02
INSULATIONInsulation used in re-roofing any
existing system must be installed inaccordance with the insulationmanufacturer’s guidelines for thespecific insulation used. BITECdoes not consider any roof insu-lation as being a part of the mem-brane system and will not warrantythe same.
Most forms of insulation arecompatible with BITEC membranesystems, however, a prefaced insu-lation is recommended. Insulationmust be installed with hot asphaltand/or mechanically fastenedaccording to the insulation manu-facturer’s guidelines.
BITEC reserves the right to ac-cept or reject any form of roof insu-lation as a suitable substrate forthe attachment of BITEC mem-branes.
Performance of any manufac-turer’s insulation is not warranteedby BITEC, nor will BITEC acceptresponsibility for failures or dam-ages to the roof system or mem-brane caused by the specific insu-lation used.
Complete removal of spray ure-thane foam is required beforeinstallation of any BITEC roofingmembrane system.
BITEC waterproofing mem-branes installed over low melt point,or high heat sensitive insulation (i.e.polystyrene) require a divorcinglayer of 1⁄2" minimum perlite insu-lation. The divorcing layer must bemechanically attached through theheat sensitive insulation, followedby the installation of a UL Type G2fiberglass base sheet, hot applied.See Section 6.05.
Note: If at all possible, it is rec-ommended that a Type G2 fiber-glass base sheet be installed withhot asphalt to an insulation/divorc-ing layer that has been mechani-cally attached. Metal stress platesbecome extremely hot during thetorching process, and can harmthe polyester core of the modifiedbitumen membrane. Plastic stressplates are not recommended foruse with torch applied products.
SECTION 6.03
ROOF INSULATION,DOUBLE LAYERAPPLICATION
BITEC strongly recommendsdouble layer application of roofinsulation, where design of FMspecifications require mechanicalattachment of the first layer, toreduce membrane stress and ther-mal loss at insulation joints andprevent thermal bridging betweenmechanical fasteners and the roof-ing membrane.
When using rigid urethane orpolyisocyanurate insulations, wherethe first layer is mechanicallyattached with fasteners containingmetal stress plates, BITEC rec-ommends the application of insu-lation be in double layers.
SECTION 6.04
ROOF INSULATION,MECHANICAL ATTACHMENT
When design requirements callfor mechanically fastening roofinsulation, the architect, engineer,
owner, or roofing contractor shouldconsult the insulation manufacturerand/or FM regarding the propernumber, size, spacing and type ofFM Approved Fasteners.
BITEC recommends the follow-ing minimum number of fastenersfor each board size:
2' x 4' – 4 fasteners
3' x 4' – 6 fasteners
4' x 4' – 9 fasteners
4' x 8' – 15 fasteners
First layer of insulation shouldbe mechanically attached, and thesecond layer, where applicable,installed in asphalt with all jointsstaggered and offset from the pre-ceding layer.
Consult the FM publications forapproved fasteners and fastenerpatterns for wind uplift require-ments in the project’s geographi-cal area.
SECTION 6.05
INSULATION & ROOFSYSTEM APPLICATIONA UL Listed G2, fiberglass base
sheet must be installed over insu-lated assemblies in accordancewith the following guidelines:
Urethane and Polyisocyanurate Insulations
A divorcing layer of wood fiber,perlite or fiberglass roof insulationshall be installed prior to the appli-cation of the BUR-MOD or modifiedbitumen roof membrane system.
Follow specifications for appli-cation of the BUR-MOD or modi-fied bitumen membrane systemover the above divorcing layer.
A separation layer is requiredover all r igid foam insulation.Blistering can result if base sheetor membrane is directly adheredto this type of insulation.
Perlite, Wood Fiber orFiberglass
Install these insulations bymechanical attachment or by appli-
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cation in hot asphalt.
Install fiberglass base sheet inhot asphalt before commencing themodified bitumen membrane appli-cation.
Half inch (1⁄2") perlite insula-tion should not be encapsulatedin hot asphalt.
When 1⁄2" wood fiber insulation isto be encapsulated in hot asphalt,only high density wood fibershould be used.
Expanded - Extruded Polystyrene (EPS)
Requires a divorcing layer of 1⁄2"minimum thickness of high densitywood fiber or 3⁄4" minimum perliteinsulation. All joints shall be taped.
Half inch (1⁄2") perlite may bemechanically fastened over theseinsulations. Fiberglass base sheetshall be installed in hot asphalt,fully mopped.
Consult insulation manufacturerfor specific application instructionsand restrictions.
SECTION 6.06
BASE SHEETREQUIREMENTS(ASTM D 4601, Type II)
BITEC recommends the use ofa UL-Listed, Type G2 fiberglassbase sheet, or a BITEC COMPA-BASE modified bitumen basesheet in all systems using BITECcap sheet membranes.
Please consult Section 2.02 forbase sheet fastening pattern whereFM requirements are not used.
Over insulated or non-nailableprepared, primed existing mem-brane, spot mop an approved vent-ing base sheet or inverted UL G3fiberglass cap sheet (buffer sheet)with ASTM D312 Type III asphalt.Never fully adhere buffer sheet tothe existing membrane.
BETA BASE is required on allsystems for 15 and 20-year, NDLand Full System warranties.
SECTION 6.07
UL LISTINGSBITEC maintains an extensive
listing of UL approved roofingassemblies, which is continuallybeing updated and is publishedannual ly in the “UL Roof ingMaterials and Systems Directory”.
BITEC also participates in UL’sfollow-up program and labels eachpallet of product.
For specific UL Classificationinformation, contact our TechnicalServices Department.
SECTION 6.08
FM SYSTEMS APPROVALReroofing applications requir-
ing assembl ies that are FMApproved, using BITEC water-proofing membranes, can befound within FM publication,Approval Guide. Information con-cerning these assemblies canalso be obtained through theBITEC Technical Services Depart-ment, or by calling your local rep-resentative.
SECTION 7.00
RE-ROOFING(RETROFIT)
It is the responsibility of thearchitect, engineer, and owner’srepresentat ive to determinewhether an existing roof is struc-turally sound, firmly attached, dryand suitable for recover. Completeexamination is required to deter-mine what repairs, if any, are nec-essary to effectively prepare thedeck for re-roofing.
All wet insulation, defectivematerials and areas not suitablefor application of the retrofit roofsystem must be repaired orreplaced.
BITEC accepts no responsi-bility for failure of the roof sys-tem due to improper preparation
of deck prior to reroofing (retro-fitting), or subsequent damagescaused thereof.
SECTION 7.01
RE-ROOFINGSPECIFICATION RGS-01
Over Gravel Surfaces
Procedure:
These BITEC General Require-ments and any supplement theretoare considered part of this proce-dure and specification, and mustbe followed.
Application:
Before application of membranebegins, consult Section 8.00“Application Safety”. Do not beginapplication of membrane until youhave fully read and completelyunderstand all procedures and pre-cautions detailed.
1) All gravel must be removedby spudding, power brooming andvacuuming.
2) Follow with application ofrecovery board (divorcing layer)insulation, mechanically fastened,according to insulation manufac-turer’s recommendations, overthe existing roof. Hot apply, ormechanically attach the UL TypeG2 fiberglass base sheet overthe insulation.
3) Install BITEC modified bitu-men membrane as specified.
Coating:
Any roof coatings used withBITEC waterproofing membranesmust be those which have beenapproved by BITEC’s TechnicalServices Department.
Roof coating must be applied inaccordance with the coating man-ufacturer’s application instructions.
BITEC does not warranty roofcoating, nor does BITEC warrantyany failure of the roof membraneor system arising from either sub-stance or application of the roofcoating.
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SECTION 7.02
REROOFINGSPECIFICATION RSS-02
Over Smooth Surfaces
For reroofing over exist ingsmooth surfaces, contact BITECTechnical Services Department.
SECTION 7.03
STATEMENT OF ACCEPTANCE
In order for warranty to be ineffect when recover situations arecalled for, BITEC must be con-tacted for instructions.
Reroofing scenarios vary con-siderably from project to project.BITEC recommends that the roof-ing contractor consult the BITECTechnical Services Department fordetails and approval before startingany re-roofing project.
Failure to do so can preventissuance of Warranty.
SECTION 7.04
PRESSURE RELIEF VENTS
BITEC requires one-way pres-sure relief vents on all recover sit-uations whether or not a RetrofitBoard or other recover or overlayinsulation of any type is used.
These vents are also requiredover all types of concrete decks,insulating fills of all types and var-ious combinations of both, for newor existing construction.
BITEC will not issue warrantiesfor new wet fill decks installed overexisting roof assemblies or anytype of concrete decks or othernon-vented decks.
One-way vents are required torelieve at least some of the belowmembrane pressure.
This pressure may develop fromdegassing of foamed plastic type
insulations or trapped vapor pres-sure created by moisture from anysource heated by the membraneinstallation, interior heat drive orby solar energy. These vents arenot intended to dry out wet situa-tions.
BITEC recommends the use ofspun aluminum vents with one-way valves. Flanges of these unitsmust be primed, top and bottom,and dry before installation.
Installation should be done inaccordance with Detail #29 of thisbook or other methods approvedby BITEC.
Metal vents are recommendedand preferred, however plastic typevents may be acceptable depend-ing on project conditions. Plastictype vents are not acceptablewith torch applied membranes.
BITEC wi l l not accept anyresponsibility for damage or failureof the roofing system caused inany way by the omission of or useof vents on recover situations.
SECTION 8.00
APPLICATION SAFETYModified bitumen roofing mem-
branes represent the latest in theevolution of bituminous roofing andwaterproofing systems. Their easeof application and strength char-acteristics make them an excellentchoice for waterproofing commer-cial and industrial roofs.
However, most systems requirethe use of hot asphalt or openflame propane torches to adherethe membrane.
Whenever working with an openflame, applicators must always useextreme caution to prevent acci-dents from happening.
Improper and/or unsafe appli-cation of waterproofing mem-branes can result in severe burns,physical injury, property damageand loss of property or life.
Your complete understanding ofapplication safety is essential tothe successful completion of anywaterproofing project.
SECTION 8.01
PERSONNELProper clothing should be worn
while applying membrane. Longsleeve shirt, long pants, leather ordurable shoes with flat soles andgloves.
Workmen, other than the torchoperator, should be no closer thanthree feet from open flame.
SECTION 8.02
FIRE PREVENTIONIt is the Contractor’s responsi-
bility to observe all fire preventionpolicies and practices; to train,instruct and warn employees onthe use of torch equipment, andany other equipment used in theapplication of membrane systems.
Follow OSHA and NRCA provi-sions for fire protection, including,but not limited to those listed inOSHA 1910.151, 155, 156, 157and 1910.110 which apply to torchapplication.
The Contractor should be famil-iar with NFPA 58 “Standard for theStorage and Handling of LiquifiedPetroleum Gas”, and any otherappropriate publications of theNational LP Gas Association.
SECTION 8.03
CODE AUTHORITYThe Contractor should be famil-
iar with all local codes and designguides affecting his service areaand should obtain any permits nec-essary before work commences.
In some areas, torch applicationis prohibited by local and/or stateregulations.
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SECTION 8.04
EQUIPMENT DO’S• Do use an adjustable pilot
with complete shut off valve.
• Do use a torch stand to directflame upwards when not inuse.
• Do use an adjustable, ULListed, regulator with thetorch.
• Do be sure that the torchingequipment is in proper work-ing order at all times.
• Do keep propane tanks in anupright position at least 10'from open flame.
• Do check all torching equip-ment for wear and tear.Replace or renew all worn orfaulty equipment.
• Do use soap solution to checkfor gas leaks before lighting.
• Do use a pressure gauge onevery regulator.
• Do have an ABC dry fireextinguisher on hand at alltimes while torching. Oneextinguisher per torch.
• Do stop work if the scent ofunburned propane isdetected. Make necessaryrepairs.
• Do close the propane cylindervalve first, and allow the resid-ual propane to burn beforeclosing the torch valve.
• Do instruct all workers onproper method of using fireextinguisher.
• Do use well built productshaving safety features, andthat are listed by UL or FM.
• Do keep vent pressure regula-tor clear at all times.
• Do work safely at all times.
• Do ignite torch with flint orelectric lighter. Matches orbutane lighters are unsafesubstitutes.
• Do treat a torch as if it isalways burning.
NEVER LEAVE ATORCH UNATTENDED
SECTION 8.05
EQUIPMENT DON’TS• Don’t use more than 50' of
hose at one time.
• Don’t use an adjustable regu-lator with higher pressurerange than that which camewith the torch.
• Don’t operate any pressuregauge beyond the top of itsscale, or near excessive heat(150°F) or where there isvibration.
• Don’t use equipment withoutan operating pressure gauge.
• Don’t turn a vapor cylinder onits side to increase pressure.LP Gas can escape.
• Don’t put out a cylinder fire ifit cannot be done without tip-ping the cylinder. Let it burn,and call the fire departmentimmediately.
• Don’t use a cigarette lighter ormatches to test for leaks.
• Don’t keep fire extinguishernext to LP tank. If fire starts attank, you may not be able toget to the extinguisher!
• Don’t fill cylinders that are inneed of repair.
• Don’t use a trowel or othertools as a torch stand.
• Don’t play with the torch.
• Don’t use damaged or faultyequipment.
WHEN IN DOUBT…DON’T USE!
SECTION 8.06
BUILDING DO’S• Do use perlite or non-com-
bustible cant strips.
• Do use fiberglass base sheeton plywood decks and on cant strips.
• Do use tight fitting felt collaron all penetrations and metalflashings before torching.
• At the completion of eachday's work, walk the jobsite
for at least one (1) hour afterthe last torch is put out, tocheck for smoldering fire.
• Do use a small torch whenflashing near details.
• Do heat roofing away from airconditioning units, fans, soilpipes and all other protrusions- set in place while hot. Caremust be taken to preventflame from entering or beingpulled down into the buildinginterior.
• Do use fiberglass base sheeton all torching applications,over all substrates.
SECTION 8.07
BUILDING DON’TS• Don’t torch anything that you
cannot see.
• Don’t torch over combustiblecants or to wood fiberinsulation.
• Don’t torch near gas lines,electrical wires or flammablevents.
• Don’t point the torch underroof top equipment.
• Don’t point torch into openroof top penetrations.
• Don’t use a torch to dry outroof surfaces or as a pre-heater torch.
• Don’t torch in an enclosedarea.
• Don’t lay operating torch onan open penetration on theroof surface. Flame can besucked into the opening.
• Don’t lay torch on the roof sur-face or membrane.
WORK SAFELYBY WORKING SMART!
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ROOF INSPECTIONS & MAINTENANCE
All roofs, no matter what theircomposition, need periodic inspec-tions to insure that they have notbeen damaged by accident orweather. The following industryaccepted guidelines should beimplemented to protect and main-tain a roof for its maximum life andand trouble-free durability.
1) Restrict roof traffic to onlywhat is necessary and to a mini-mum; keep a log of everyone goingon the roof. Inform necessarytrades requiring access to be verycareful to protect the roof mem-brane from falling objects or sol-vent spills. Have a responsible per-son check the roof area when oth-ers have been working on the roof.
Keep records of the original roofinstallation dates, all productsinstalled, repairs, the contractors’names, and any other rooftop ac-tivity. These records can be aninvaluable aid in finding leaks atlater dates and historical recordswill help determine the leak historyfor future repairs and replace-ments. You should f i le theserecords in a readily accessibleplace.
2) Do not allow materials orequipment to be stored on the roof.Roofs should not be allowed tobecome a junk yard for discardedequipment, empty cans, etc.
3) When equipment or materi-als must be transported over theroof, protect the affected area withplywood runways.
4) If roof membrane was sur-faced with a reflective coating, aperiodic recoating will protect themembrane and reduce energycosts.
5) Provide roof inspections atleast twice a year. The more oftena roof is inspected, the more likelythat any problems will be discov-ered before they cause extensivedamage. Some roofs will inherentlyrequire inspections more often to
insure that drains, scuppers andgutters are kept clear and open formaximum drainage. Additionalinspections should be made afterany major storms or when condi-tions may have allowed the roof tobe affected. Discuss the possibilityof an inspection and maintenanceprogram with your roofing con-tractor, general contractor or roofconsultant.
Other items to check for dam-age or necessary maintenance areas follows:
a. Roof penetrations: Pitch pansneed to be kept full and shouldhave protective rain collarswhere possible. Where raincollars are not possible, thefiller should be coated with analuminum or other suitablecoating. Use only durable fillerproducts compatible with theoriginal filler.
b. Metal flashing joints will requireperiodic replacement of sealantand fasteners may need re-placement or tightening. Jointsat gravel guards and fasciasbuilt into the roof membraneare a particularly troublesomedetail which generally needperiodic maintenance.
c. Reglets along walls, parapetsor equipment, will need peri-odic replacement of sealantand fasteners may needreplacement or tightening.
d. Roof drain clamp rings mayneed periodic tightening.
e. Base flashing may becomeloose from fastenings at topand/or corners and needrepair. At parapets and somewalls, base flashings are gen-erally subject to differentialmovement which causes diag-onal wrinkling and in turn cancause damage to the baseflashing.
f. Termination bars or compres-sion f i t t ings must be kept
securely fastened and anyassociated sealants must bekept in good condition.
g. All roof membrane seamsshould be inspected for openseams, fishmouths, wrinkles,etc.
h. All roof areas should be in-spected for blisters, splits,loose areas, ponding waterand debris accumulation.
i. Expansion joints and controljoints should be inspected foropen joints, splits and loosefastenings.
6) Roofs that are under warrantyby either a specific contractor orBITEC should not be repaired oraltered by another contactor with-out express permission from thatcontractor and only BITEC's autho-rized contractors should performwork on roofs covered by BITECwarranties. Otherwise warrantycoverages will be effected.
7) When roofs are to be alteredby the addition of any roof topequipment or penetrations, theoriginal installer and/or membranemanufacturer should be consultedfirst to insure that only proper mate-rials are used for compatibility.Complete information regardingalterations or repairs should bekept on file and provided to themanufacturer of record.
8) Any apparent damage to theroof should be reported whether ornot any leaks have been noticed.Repairs should be made promptly.
As a reminder, all additions ofequipment, deck penetrations orany change requir ing cutt ingthrough the BITEC membrane andany change which may alter theproper drainage of the roof musthave prior approval of BITEC, INC.and the work must be completedby a BITEC Authorized RoofingContractor to maintain the validityof the Warranty.
FA
ST
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31
FA S T E N E R S
Due to a changing fastener mar-ket, all reference to fasteners inBITEC publications will be genericand will only make reference to cer-tain types and only appropriatedesigns for the specific deck or sit-uation in which they are to be used.
Insulation and fastener manu-facturers spend a great deal oftime, effort and expense with FMand UL performing wind uplift tests.This testing is a continuing processand the best source of informationwill come from the manufacturerswho are involved in the testing.Specific information is availablefrom any of these manufacturersshowing the exact fastening pat-
tern and type to be used.
BITEC merely requires that fas-teners be of an “approved type,appropriate for the specific situa-tion.” BITEC does not specify anybrand of fasteners but may rec-ommend a type for a particularapplication. On the other hand,BITEC may elect not to approve acertain fastener for any reason.
For instance, BITEC does notapprove the use of nails for secur-ing insulation over 1⁄2" in thicknessand in many instances will requirethe use of screw and plate typefasteners.
Fasteners used to secure mem-
brane end laps on slopes thatrequire the membrane to beinstalled parallel to the slope, mustalways be screw and plate design,not nails, except for use in deckswhere a special type fastener isrequired. In some instances, eventhat special type fastener mustincorporate the use of a largerstress plate.
Since BITEC does not manu-facture, market or distribute fas-teners, BITEC warranties do notcover fasteners. Any questionsregarding fasteners should bedirected to our Technical ServicesDepartment at (800) 535-8597.
����
L E X S U C O
UN
IVE
RS
AL
T R U - F A S T
SPIKE
“WOODIE”
RAWL“SPEED
LOCK”TOGGLE
“NAILIN”ZAMAC OR
NYON
"POWERLITE"S.S. SealingWasher
RAWLDECKSCREWSizes#12, #14
Plastic
Galvalume Steel Plate
“TUBE LOC” Nail.Base ply fastener Nail locked
in deck15/16" dia. cap;
3" dia. disc available
Nail insert
One piece tubewith attached disc
Lengths:1"1-3/4"2-1/2"3"4-1/2"5-1/2"6-1/2"
"POLYMER GYPTEC"
GALVALUME
“ROOFGRIP” Self-tapping, self-drilling screw with steel or plastic plate.
Plastic 3PSteel 3S
Round Washer Plates used with steel deckscrews, Toggles and "Tectum" screws.
“CONTITE”
NTB - 1HWOFastener without
Locking WireBarbs
“Non Thermal Bridging” FastenerLightweight Concrete and Cement Fiber
NTB - 2HWWFastener withLocking Wire
Barbs
“N-CFASTENER”
DEKFAST PLATES:
Plastic Locking
Steel Hexagonal
Steel Round
#15 HighStrength
Deckfast#12
Stainless SteelFastener
“DEKLITE”
“Dekfast-14” - use same plates as with Dekfast-12
"NAIL-TITE''
ES-60
ES-90 “LEXSUCO” Universal plate and clip
Lengths Available:————————
Short 2-3/8"
Long 3-5/8"
X-Long 4-5/8"
TPScrew
DPScrew
CFScrew
3" Metal Plate
2" Metal Plate
ITW BUILDEX
CONSTRUCTION FASTENERS
ES PRODUCTS INC. BUILDING MATERIALSCORP. OF AMERICA
TRU-FAST
POWER FASTENERS, INC.
OLYMPIC FASTENERS
SIMPLEX NAIL & MFG.
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C O N S T R U C T I O N D E TA I L S
The fol lowing constructiondetails are provided as minimumflashing detail guidelines for usewith BITEC membranes. Specificfield conditions may necessitateother details or modifications ofthese details. BITEC does notintend that details be limited to theones shown in this manual.
Interruptions in the roof mem-brane are the most likely place forleaks to occur. Membranes shouldbe installed in accordance withtime proven methods and details.
Ultimately, the responsibility forthe design of the actual specificdetails for any given project is theresponsibility of the project de-
signer, be that an architect, engi-neer, consultant, owner or roofmembrane installer.
However, for projects requiring awarranty with unusual conditions,consult BITEC’s Technical Ser-vices Department regarding suchconditions.
BITEC requires that good roof-ing practices, such as but not lim-ited to those published in theNRCA Roofing and WaterproofingManual, be followed with all instal-lations. These details have beendeveloped by the industry overmany years.
Failure to follow these minimumguidelines can jeopardize perfor-
mance of the roof system and war-ranty issuance.
All edge flashing details shouldbe designed and installed to meetthe FMRC Loss Prevention DataBulletin #1-49 requirements.However, some local code require-ments may take precedenceregarding certain design items.Designers and contractors shouldacquaint themselves with pertinentlocal code requirements, whichmay change from time to time.
“Alternate” details 1a, 2a & 4ain this publication may not meetspecific wind uplift resistancerequirements, according to theFMRC 1-49 requirements.
TABLE OF DETAIL DRAWINGS
For other details, not shown, Contact BITEC’s Technical Services Department at (800) 535-8597
1. Draining Edge with Gutter
1a Draining Edge with Gutter, alternate
2. Flat Draining Edge (Drip Edge, Gravel Stop)
2a Flat Draining Edge (Drip Edge, Gravel Stop), alternate
3. Raised Roof Edge (with Cant Edge)
4. Low Raised Edge (with Tapered Edge)
4a Low Raised Edge (with Tapered Edge), alternate
5. Low Parapet Wall
6. Parapet Wall End Termination
7. High Parapet with Multi-Ply Base Flashing
7A High Parapet Base Flashing at Plywood Walls
7B High Parapet Base Flashing at Masonry Walls
7C Multi-Ply Base Flashing at Masonry Parapets
7D Multi-Ply Base Flashing, Stone Capped Masonry Walls
7E Multi-Ply Base Flashing at EIFS Walls
8. Base Flashing for Wall Supported Deck
9. Base Flashing for Non-Wall Supported Deck
10. Base Flashing for Vented Base Sheet
11. Typical Termination Bar Counterflashing
12. Area Divider Curb
13. Curb Type Expansion Joint
14. Low Profile Raised Expansion Joint
14A Low Profile Prefab Expansion Joint
15. Thru Wall Scupper
16. Scupper Thru Raised Roof Edge
17. Roof Drain Without Lead Flashing
18. Roof Drain With Lead Flashing
19. Sheet Metal Pan Roof Drain
20. Skylight, Hatch and Smoke Vent Curbs
21. Roof Top Air Handling Units
22. Insulated Steel Deck Frame Support
23. Concrete Deck Frame Support
24. Pipe Support with Roller Assembly
25. Equipment or Sign Support Rail
26. Pipe and Flashing Clearances
27. Mechanical Equipment Stand
28. Plumbing Vent Flashing
29. Approved One-Way Vents
30. Hot Stack Flashing Curb
31. Piping Thru Roof Deck
32. Typical Pitch Pan
33. Split Repair
NOTE: Lower case "a" designates an alternate detail, and upper case letters with detail numbers indicate additional similar details.
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BITEC flashing membraneedge strip
Bleed out at edge
BITEC field membrane, turned down over edge with optionalsurfacing or coating
Base sheet or modifiedbitumen base as required
Roof insulation
Roof deck
Wood blocking, secured withappropriate fasteners;match insulation thickness
Modified bitumen or asphalt bleed out at both edges
Metal drip edge with or w/o raised lip, flange primed top &
bottom, set in SBS modified bitumen cement or heat
softened APP membrane.Nails 3" o.c. staggered.
Re: Detail #2
1" minimum height difference
When face dimension exceeds 2.5", a continuous hook strip may be required
4" min. 4" min.
Gutter with straps or supports as required
by project details
����CAUTION: This alternate edge detail is not in compliance with FM Loss
Prevention Data Bulletin I-49 for Perimeter Flashings
BITEC cap membrane overmetal edge flashing.
BITEC smooth membrane, turned down over edge. Extend min. of 6-8" past edge of metal flange
Base sheet or modifiedbitumen base as required.
Roof insulation
Roof deck
Wood blocking, secured withappropriate fasteners;match insulation thickness
Seal with modified bitumen,or asphalt bleed out at edges
Metal edge trim with flangeprimed top & bottom and setin modified bitumen sealant.
Nails 3" o.c. staggered.RE: Detail #2
1" minimum height difference
Gutter with strapsas required
When face dimension exceeds2.5", a continuous hookstrip may be required
4"
1. Draining Edge with Gutter
1a. Draining Edge with Gutter, alternate
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������4" min. as specified
4 nails1/4" min. space,
fill with sealant5 nails
sealantbetween joints
LAP JOINT DETAIL (preferred) JOINT COVER DETAIL (alternate)
Metal fascia or edge trim,with or w/o raised lip, primed
top & bottom, set in SBS modified bitumen flashing
cement or heat softened APP membrane.
Roof flange, 4" min. width
Modified bitumen sealant
under metal flange
Continuous cleat
Wood blocking, secured with appropriate fasteners,
match insulation thickness
Roof insulation
Steel deck
Modified bitumen or asphaltbleed out at both edges
BITEC membrane edge strip
BITEC field membraneturned down over edge withoptional surfacing or coating
Fasteners 3" o.c.,staggered as shown
Base sheet or modifiedbitumen base as required
1-1/2"
1/2"
3"
3"
4" min.
4" min.
(PLAN VIEWS)
4"
min
.
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Metal fascia, gravel stop withlow raised edge or plain
drip edge without raised lip.Prime flange top & bottom,Roof flange, 4" min. width
Modified bitumen sealantunder metal flange
Continuous cleat
Wood blocking, secured withappropriate fasteners,
match insulation thickness
Roof insulation
Steel deck
Modified bitumen or asphaltbleed out at edge
BITEC field membraneover metal edge flashing
BITEC smooth membraneturned down over edge
Fasteners 3" o.c.,staggered as shown
Base sheet or modifiedbitumen base as required
1-1/2"
1/2"
3"
6 to 8"
(See Lap Joint detail - #2)
CAUTION: This alternate edge detail is not in compliance with FM LossPrevention Data Bulletin I-49 for Perimeter Flashings
4"
2. Flat Draining Edge (Drip Edge, Gravel Stop)
2a. Flat Draining Edge (Drip Edge, Gravel Stop), alternate
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Fasteners at top of cantslope, 16" o.c.
BITEC modified bitumen baseflashing, up and over cantand blocking
Cant strip - fastenedto wood blocking
Note: This detail should be used onlywhere deck is supported by theoutside wall.The cant strip placed as shown willresult in a higher fascia line. Fasciaheight can be higher than shown.Attach nailer to wall or structure.Refer to Factory Mutual Data sheet 1-49.Wood blocking may be slotted for venting where required.
10' 0" max.
1/2" min.
4 to 6"
4" min.
Metal Fascia
3-1/2" minimum
Continuous cleat
Wood blocking secured withappropriate fasteners, match
insulation thickness
Metal joint covers as req'd.set in elastomeric sealant
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenmembrane with optional surfacing or coating
Base sheet or modifiedbitumen base as required
Insulation
Steel deck
Note: Secure roof edge metal with fasteners, 16" o.c. and at cover plates; elastomeric sealant at all plates and fasteners
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1-1/2"
3"
3"
Metal fascia, gravel stop withlow raised edge or plain drip
edge without raised lip.Prime flange top and bottom
Modified bitumen or asphaltbleed out at both edges
Nails 3" o.c., staggeredRE: Detail #2
4" min.
4" min.
1/2"
Bleed out
BITEC flashing membrane
BITEC field membraneturned down over edge withoptional surfacing or coating
Base sheet or modifiedbitumen base as required
Roof insulation
Steel deck
Metal flange, 4" min. width
Modified bitumen sealantunder metal flange
Continuous cleat
Wood blocking, secured withappropriate fasteners, match
thickness of taperand insulation
Tapered edge stripset in asphalt or
mechanically attached
4" min. as specified
4 nails1/4" min. space,
fill with sealant5 nails
sealantbetween joints
LAP JOINT DETAIL (preferred) JOINT COVER DETAIL (alternate)(PLAN VIEWS)
4"
min
.
3. Raised Roof Edge (with Cant Edge)
4. Low Raised Edge (with Tapered Edge)
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.
.
.
.
..
CAUTION: This alternate edge detail is not in compliance with FM LossPrevention Data Bulletin I-49 for Perimeter Flashings
(See Lap Joint detail - #2)������������������
Metal fascia, gravel stop withlow raised edge or plain drip
edge without raised lip.Prime flange top & bottom,Metal flange, 4" min. width
Modified bitumen sealantunder metal flange
Continuous cleat
Wood blocking, secured withappropriate fasteners,
match thickness of insulationand tapered edge
Tapered edge strip, set in asphalt or mechaniclally
fastened
Roof insulation
Steel deck
Modified bitumen or asphalt bleed out at edge
BITEC field membraneover metal edge flashing
Modified bitumen or asphalt bleed out at edge
BITEC smooth membraneturned down over edge
Fasteners 3" o.c.,staggered as shown
Base sheet or modifiedbitumen base as required
1-1/2"
1/2"
3"
6 to 8"
4"
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Joint cover, 4" to 6" wide,set in elastomeric sealant
1/2" wide gapbetween pieces
Fasteners, approx. 24" o.c.at coping
Fasteners approx. 8" o.c.at base flashing
BITEC modified bitumen baseflashing, up and over wall8" min. height
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenmembrane with optionalsurfacing or coating, extend4" min. above cant
Fiberglass base sheet, nailedtight to plywood; unattached over lower base sheet
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Roof InsulationNote:This detail should be used only where thedeck is supported by the wall. An expansion jointdetail should be used for non wall-supported deck.
4" min.
Coping - designed to meetFMRC 1-49 requirements
10' max. length each piece
Exterior plywood on cleator tapered blocking to
provide slope
Solid wood blocking
Exterior siding, brick, etc.
Cant strip, securely nailedor set in bitumen
Wood blocking, secured withappropriate fasteners,
match insulation thickness
Wood framed wallconstruction shown
24" max.
4a. Low Raised Edge (with Tapered Edge), alternate
5. Typical Parapet Wall (for 2-Ply Systems)
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Intermediate flashing skirt
Metal counterflashing
BITEC modified bitumen baseflashing with 8" min. heightabove roof surface
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenflashing edge strip overmetal edge trim. (Gravelstop, fascia, etc.) Refer to detail #2
Parapet copingdesigned to meet
FMRC 1-49 requirements
Seal end of metal flashing orinstall metal corner cover
Sheet metal end closure
Gutter
4" min.
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Wall flashing membrane
Interply membrane
Exterior plywood on cleator tapered blocking
to provide shape
Solid wood blocking
Fiberglass G2 base sheet,nailed tight to plywood,
fastened 8" o.c. eachdirection and unattached
over the lower base sheet
Exterior siding, brick, etc.(wood framed wall
construction shown
Cant strip, securelynailed or set in bitumen
Wood blocking, securedwith appropriate fasteners,match insulation thickness
Roof insulation
Note: This detail should be used only where the deck issupported by the wall. An expansion joint detail should be usedfor non wall-supported deck. Contact BITEC Technical Services forsuitability of attachment at cants if building movement is not a concern.
Coping - Designed to meetFMRC 1-49 requirements
Fasteners approx. 24" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
BITEC base flashing (8" min.;24" max. height), extend 2" min. up under wall flashing
BITEC base flashing interplymembrane, extend 2" min. up under the next membrane
Fasteners 8" o.c. above thebase sheet
BITEC modified bitumenmembrane with optionalsurfacing or coating, extend4" minimum above cant
Modified bitumen or asphaltbleed out at edge
BITEC interply membraneextend 4" min. above cant
Base sheet or modified bitumen base as required,fully adhered, extend 2" min.above the cant
24" max.
DR
YD
RY
DRY
4" min.
6. Parapet Wall End Termination
7. Multi-Ply Base Flashing at Plywood Parapets
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.
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.
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.
.
.24"
max.
Coping
Wall flashing membrane
Fasteners approx. 24" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
BITEC base flashingmembrane, extend 2" min.under wall flash. membrane
Fasteners 8" o.c. above base sheet
BITEC modified bitumen membrane with optional surfacing or coating, extend 4" min. above cant
Modified bitumen or asphaltbleed out at edge
Base sheet or modified bitumen base as required,extend 2" min. abovethe cant
Note: This detail should be used only where the deck is supported by the wall. An expansion joint detail should be usedfor non wall-supported deck. Contact BITEC Technical Servicesfor suitability of attachment if building movement is not a concern.
Exterior plywood on cleator tapered blocking
to provide shape
Solid wood blocking
Fiberglass G2 base sheet,nailed tight to plywood,
fastened 8" o.c. eachdirection and unattached
over the lower base sheet
Exterior siding, brick, etc.(wood framed wall
construction shown)
Cant strip, securelynailed or set in bitumen
Wood blocking, secured withappropriate fasteners,
match insulation thickness
DR
YD
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DRY
4" min.
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Coping
Wall flashing membrane
Fasteners approx. 24" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
BITEC base flashing membrane,extend 2" minimum up underwall flashing membrane
Fasteners 8" o.c. above base sheet
BITEC modified bitumen membrane with opt. surfacingor coating, extend 4" min.above cant
Modified bitumen or asphaltbleed out at edge
Base sheet or modified bitumen base as required,fully adhered, extend 2" min. above the cant
Note: This detail should be used only where thedeck is supported by the wall. An expansion jointdetail should be used for non wall-supported deck. Contact BITEC Tech. Services if building movement is a concern.
24" max.
Exterior plywood on cleator tapered blocking
to provide shape
Solid wood blocking
Prime masonry surfaces
Exterior siding, brick, etc.
Cant strip, securelynailed or set in bitumen
Wood blocking, securedwith appropriate fasteners,match insulation thickness
4" min.
7A. High Parapet Base Flashing at Plywood Walls
7B. High Parapet Base Flashing at Masonry Walls
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4" min.
Coping
Fasteners approx. 24" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
BITEC base flashing membrane,extend 2" up under wall flashingmembrane
BITEC base flashing interplymembrane, extend 2" min. up under the next membrane
Fasteners 8" o.c. above thebase sheet
BITEC modified bitumenmembrane with optionalsurfacing or coating, extend4" minimum above cant
Modified bitumen or asphaltbleed out at edge
BITEC interply membraneextend 4" min. above cant
Base sheet or modified bitumen base as required,fully adhered, extend 2" min.above the cant
Wall flashing membrane
Interply membrane
Exterior plywood on cleator tapered blocking
to provide shape
Solid wood blocking
Prime masonry surfaces
Exterior siding, brick, etc.(masonry wall
construction shown)
Cant strip, securelynailed or set in bitumen
Wood blocking, securedwith appropriate fasteners,match insulation thickness
Note: This detail should be used only where the deck is supported by the wall. An expansion jointdetail should be used for non wall-supported deck. ContactBITEC Technical Services if building movement is a concern.
24" max.
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Precast stone coping
Metal thru-wall flashing receiver,seal at lap joints
Coping anchor dowelsseal at penetrations
with sealant
Masonry wall construction
Prime masonry surface
Cant strip, securely nailedor set in bitumen
Wood blocking, fasten todeck with appropriate
fasteners, match insulationthickness
Deck support at wall
Roof Deck
Fasteners 24" o.c. max.
Fasteners 8" o.c.
BITEC base flashing (8" min., 24" max. height), extend 4"min. up under counterflashing
BITEC base flashing interply, extend up under counterflashingas far as possible, 24" max.
Fasteners 8" o.c., abovethe base sheet
BITEC modified bit. membranewith optional surfacing/coating,extend 4" min. above cant
Counterflashing insert, fastenedinto thru-wall flashing receiver
BITEC interply membrane,extend 4" min. above cant
Modified bitumen or asphaltbleed out at edge
Base sheet or modified bitumenbase as required, fully adhered,extend 2" min. above cant
Roof insulation
7C. Multi-ply Base Flashing at Masonry Parapets
7D. Multi-ply Base Flashing, Stone capped masonry walls
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Thru-wall flashing receiver
Metal studs
16" o.c. m
ax
Roof deck
Roof insulation
1/2" Dens Deck withsurface primed
Cant strip, securely nailedor set in bitumen
Wood blocking, securedwith appropriate fasteners,match insulation thickness
4" wide, 20 ga. sheet metalfastening strip continuous
behind Dens Deck
EIFS
BITEC interply membrane, extend 4" min. above cant
Base sheet or modified bitumenbase as req'd., fully adhered,extend 2" min. above cant
BITEC base flashing
BITEC base flashing interplymembrane extend up full height
BITEC modified bitumen membrane w/optional coatingor surfacing, extend full height
Fasteners 24" o.c. max
Drip sheet vapor barrierbehind EIFS
H.D. Termination bar
Fasteners at studs
2" wide clips @ 16" or 32" o.c.studs depending on flash. metal
Counterflashing insert, fastenedinto thru-wall flashing receiver
Intermediate fasteners
24"max. Modified bitumen or asphalt
bleed out at edge
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Metal thru-wall flashing receiver, built into masonry. Joints must be lapped andsealed
Removable counterflashing insert
Fasteners approximately24" o.c. max.
Fasteners approx. 8" o.c.
2" wide clip,approx. 3 0" o.c.
BITEC modified bitumenbase flashing with minimum8" height above the roofsurface
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenfield membrane withoptional surfacing or coating,extend min. of 4" above cant
Base sheet or modifiedbitumen base as required,extend 2" minimum above cant
Roof insulation
Deck support at wall
Prime masonry
Masonry wall construction
2" minimum
Cant strip, securely nailed or set in bitumen
Wood nailer, secured to deck with appropriate
fasteners, approx. 24" o.c.,match insulation thickness
Note: This detail should be used only where deck is supported by the outside wall.
Clips at the bottom of the flashing are notnecessary on flashings of 6" or less that fit tightagainst the base flashing.
See detail #9 for the preferred construction.
4" min.
24" max.
7E. Multi-ply Base Flashing at EIFS walls
8. Base Flashing for Wall Supported Deck
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Metal thru-wall flashingreceiver, built into masonry. Joints must be lapped and sealed
Fasteners approx. 24"o.c. minimum
Removable counterflashing,lap metal at joints
Fasteners approx. 8" o.c.
2" wide clip, approx. 30" o.c(see note, detail #8)
BITEC modified bitumen baseflashing with minimum 8"height above roof surfaceCover top edge of flashingwith the vapor retarder
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenmembrane with optionalsurfacing or coating, extend4" minimum above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant.
Roof insulation
3" lap with sealant
Flexible vapor retarder to serve as an insulation
retainer
Vertical wood curb member,fasten to wood blocking,
Bevel top of wood
Compressible insulation
Cant strip to provide structural strength; nail top
and bottom approx. 16" o.c.
Wood blocking, securedto deck with appropriate
fasteners, match insulationthickness
Note: This detail allows wall and deck to moveindependently, and should be used where thereis any possibility that differential movement will occurbetween the deck and a vertical surface, such as ata penthouse wall. The vertical wood member shouldbe fastened to the deck only. Other methods may be used.
24" max.
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Metal thru-wall flashingreceiver, built into masonry. Joints must be lapped and sealed
Removable counterflashing insert
2" wide clip,approx. 3 0" o.c. (see notes)
BITEC modified bitumen base flashing, with 8" min. height above the roof surface
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenmembrane with optional surfacing or coating,extend 4" min. above cant
Approved fasteners for type of deck
BITEC or approved ventedbase sheet, extend 2" min.above cant
Insulating concrete
Deck support at wall
Fasteners approx.24" o.c. max.
Fasteners approx. 8" o.c.(no seal)
Do not seal the base sheet or membrane plies to wall
Cant strip, securely nailed or set in bitumen
Wood nailer secured to deck with appropriate fasteners,
approx. 24" o.c.,match insulation thickness
Note: This detail should be used overwet-fill decks or when reroofing.
Care should be taken not toseal the base sheet to the parapet.
Clips at the bottom of the flashing are notnecessary on flashings of 6" or less that fittight against the base flashing.
4" min.
24" max.
9. Base Flashing for Non Wall Supported Deck
10. Base Flashing for Vented Base Sheet
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Caulk with elastomericsealant
Angle, channel or "termination"bar with slotted anchor holes and fasteners in exp. shields
Metal counterflashing
Compressible elastomeric tapeto span irregularities
Seal top of system with fabrictape and modified bitumensealant
BITEC modified bitumenbase flashing with minimum8" height above the roofsurface
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenfield membrane withoptional surfacing or coating,extend min. of 4" above cant
Base sheet or modifiedbitumen base as required,extend 2" minimum above cant
Roof insulation
Deck support at wall
Smooth concrete,exposed surfaces must
be waterproofed
Prime concrete with asphalt primer
Fasteners approx. 8" o.c.
Wood nailer, attach to concrete wall with approved method. Chamfer top to drain
Cant strip, securely nailed
or set in bitumen
Wood blocking, fasten to deck with appropriate fasteners. Match the insulation thickness
Note: Where deck is supported by and fastenedto the concrete wall, vertical wood nailersshould be secured to the wall with suitable fasteners
4" min.
24" max.
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Metal cap flashing
Fasteners approx. 24" o.c.at metal cap
Fasteners approx. 8" o.c.at base flashing
BITEC modified bitumen baseflashing, to top of the curb
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating.Extend 4" min. above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Nail top and bottom approx. 16" o.c. minimum
BITEC modified bitumen cap flashing, over top of curb
Vertical grooves (kerfing) cut for venting, 24" o.c.
where required
Cant strip, securely nailed for strength
Wood blocking, securely fastened to deck with appropriate fasteners,
match insulation thickness
Note: An area divider is designed simply as a raised doublewood member attached to a properly fastened wood baseplate that is anchored to the deck.
Vertical grooves (kerfing) may be saw-cut to facilitateventing with use of venting base sheets.
4" min.
11. Typical Termination Bar Counterflashing
12. Area Divider Curb
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Pre-manufactured expansionjoint cover with metal flanges
Fasteners 8" o.c. max
Fasteners approx. 8" o.c.both sides at base flashing
Bitec modified bitumen baseflashing with 8" min. height.Cover top of flashing with the vapor retarder
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating.Extend 4" min. above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Nail top and bottomapprox. 16" o.c. minimum
Flexible vapor retarder to serve as insulation retainer,
attach to top of curb
Chamfer each side of wood curb to drain
Compressible insulation
Nailed wood cant to provide structural strength
Wood nailer each side secured to deck with
appropriate fasteners approx. 24" o.c.,
match insulation thickness
Note: Variations of this detail can be used to accommodateseveral situations. Joints, corners, cross-overs and endterminations are of particular importance.
4" min.
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Cap sheet membrane,Top ply
Flexible tube
Smooth cap sheet,Bottom ply
Tapered edge strip
Roof insulation
Steel deck
Steel joist
Compressible insulation
Flexible vapor retardermembrane to serve as
retainer for compressibleinsulation, attach to top of
wood nailers
Cap sheetmembrane
Modified bitumenor asphalt bleedout at both edges
Base sheet
13. Curb Type Expansion Joint
14. Low Profile Raised Expansion Joint
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Modified bitumenor asphalt bleedout at both edges
PrefabricatedRoof expansion joint withmetal flanges
Sealant
Cap sheet membranestripping ply
Flexible vapor retardermembrane to serve as
retainer for compressibleinsulation, attach totop of wood nailers.
Bleed out at edge
Tapered edge strip
Roof insulation
Steel deck
Steel joist
Compressible insulation Cap sheet membrane
Base sheet
Primed metal flange,fastened 3" o.c.staggered - set in sealant
6" min.
6" min.
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Coping
Fasteners approx. 24" o.c.at coping
Fasteners 8" o.c.at base flashing
Scupper assembly, set inmastic or sealant on topof base ply
Scupper flange, covered
Bitec modified bitumen base flashing, up andover the wall
Modified bitumen or asphaltbleed out at edge and at scupper tube opening
Bitec modified bitumen membrane, with optional surfacing or coating, extend up over scupper flange
Fiberglass base sheet, nailed tight to plywood, unattached over lowerbase sheet
Base sheet or modifiedbitumen base as required,extend 2" above cant
Prime flange, top & bosttom,set in mastic or sealant andsecurely fasten flangeto wood blocking
Treated wood blocking,sloped as required
Exterior siding, brick, etc.
Scupper flange
Cant strip, securely nailed or set in bitumen
Wood blocking, securely nailed
Wood framed wall construction
Drip lip
NOTE: This detail should be usedonly where the deck is supportedby the wall. An expansion jointdetail should be used fornon-wall supported deck.
Roof insulation
Deck
One piece sheet metalScupper Tube Configuration
14A. Low Profile Prefab Raised Expansion Joint
15. Thru-Wall Scupper
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Using Prefabricated Expansion Joint Cover
������BITEC modified bitumenflashing sheet
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating
Base sheet or modifiedbitumen base as required
Fasten scupper flangesto wood blocking
Prime flange top and bottom before stripping,form scupper pan to fit
wood blocking configuration
Turn edge ply down OVER BLOCKING INTO
CONDUCTOR HEAD
Notes:
This detail should be used onlywhere the deck is supported by the outside wall.
This detail can be adapted to other roof edge conditions and can be installed after buildingis completed
This detail is used to relievestanding water in areas along theroof edge. All roof surfaces should be sloped to drain.
Attach nailer to wall. Refer to Factory Mutual data sheet1-49. Wood blocking may be slotted for venting where required.
Roundedcorners
Modified bitumenor asphalt bleed outat edges
Cut-away view thru-scupper
Conductor head
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Strainer
Clamping ring
Modified bitumen targetflashing with optionalsurfacing or coating
Modified bitumen or asphaltbleed out at edges
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating
40" x 40" smooth surfacemodified bitumen collar,sealed to roof drain flange
Base sheet or modified bitumen base as required
Taper insulation24" to drain
Deck clamp
Notes:
1. Stop base sheet at edge of roof drain flange
2. Install 40" x 40" (nominal) modified bitumen collar into drain and seal to roof drain flange 3. Install roof membrane over collar into drain
4. Install 36" x 36" min. size target flashing strip over roof membrane.
Rounded corners
16. Scupper Through Raised Roof Edge
17. Roof Drain without Lead Flashing
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Strainer
Clamping ring
Modified bitumen targetflashing with optionalsurfacing or coating
Modified bitumen or asphaltbleed out at edges
Lead flashing, primed topand bottom
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating
40" x 40" smooth surfacemodified bitumen collar,sealed to roof drain flange
Base sheet or modified bitumen base as required
Lead flashing, primedtop and bottom
Taper insulation24" to drain
Deck clamp
Notes:
Min. 30" sq., 2-1/2 to 4 lb. lead flashingSet on modified bitumen membrane in modifiedbitumen sealant. Prime top surface before stripping.
Membrane plies and metal flashingextend under clamping ring. Stripping membraneextends 4" beyond edge of flashing sheet, but not beyondthe edge of sump.
Rounded corners
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to drain pipe. Prime metalflange, top and bottom, allow to dry before installation. Set in BITECCompaflash stick bitumen orapproved modified bitumensealant and fasten to wood blocking
BITEC smooth surfacemodified bitumen collarmembrane, extend 6" min.beyond edge of metal flange
Base sheet or modifiedbitumen base as required
Insulation
Wood blocking fastenedto deck, match
insulation thickness
Seal edge of membraneto drain with BITEC
Compaflash stick
Fastenmetal flange
to woodblocking
3" o.c.
Install wire-typestrainers
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating
18. Roof Drain with Lead Flashing
19. Sheet Metal Pan Roof Drain
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Double dome skylightshown
Wood curb, 2"x10" min.(factory curbs optional)
Cant strip,set in bitumen or nailed
Wood blocking secured todeck with appropriate
fasteners, matchthe insulation thickness
4" min.
Extruded aluminum framewith weep holes
Metal counterflashingto accommodate specificcurb situation, withfasteners 8" o.c.
Skylight anchors as specified
Fasteners approx. 8" o.c.at base flashing
Modified bitumen base flashing with 8" minimin height above roof surface
Modified bitumen or asphaltbleed out at edge
BITEC modified bitumenmembrane with optionalcoating or surfacing. Extend4" min. above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Roof insulation
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Metal frame, 16 gauge min.
2" wood nailer
Curb insulation
Cant strip set in bitumenor nailed
Wood blockingfastened to deck,
match insulation thickness
Alternate frame supportfor heavy units.
Seal strip or sealant
Counterflashing fastenedapprox. 18" o.c. with aminimum of 3 per side
BITEC modified bitumen baseflashing with 8" min. heightabove roof surface
Fasteners approx. 8" o.c.with a minimum of 2 each side
BITEC modified bitumen fieldmembrane with optionalcoating or surfacing. 8" min.height above roof surface.
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Roof insulation
4" min.
Roundedcorners
Modified bitumenor asphalt bleed out at edges
20. Skylight, Hatch and Smoke Vent Curbs
21. Roof Top Air Handling Units
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Caulk with elastomericsealant
Draw band
Watertight umbrella(Rain collar or storm collar)
Modified bitumen targetflashing over the fieldmembrane
Modified bitumen or asphaltbleed out at edges
Roof Jack, 8" min. heightwith 4" min. flange
Rounded corners
BITEC modified bitumenmembrane with optional surfacing or coating
Modified bitumen collarflashing under metal flange,extend 6" min. beyond edge of flange
Base sheet or modifiedbitumen base as required
Structural frame
Nail flange to wood nailer,flange set in sealant overroofing - prime flange top
and bottom before stripping
Roof insulation
Steel deck
Wood blocking, secureto deck with appropriate
fasteners, matchinsulation thickness
Compressible insulation
Welded anchor plate
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Structural frame
Nail flange to wood nailer,flange set in sealant over roofing - prime flange top
and bottom before stripping
Roof insulation
Concrete deck
Wood blocking, secureto deck with appropriate
fasteners, matchinsulation thickness
Compressible insulation
Welded anchor plate
Caulk with elastomericsealant
Draw band
Watertight umbrella(Rain collar or storm collar)
Modified bitumen targetflashing over the fieldmembrane
Modified bitumen or asphaltbleed out at edges
Roof Jack, 8" min. heightwith 4" min. flange
Rounded corners
BITEC modified bitumenmembrane with optional surfacing or coating
Modified bitumen collarflashing under metal flange,extend 6" min. beyond edge of flange
Base sheet or modifiedbitumen base as required
22. Insulated Steel Deck Frame Support
23. Concrete Deck Frame Support
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Adjusts verticallyand horizontally
Set boltsin elastomeric sealant
This detail allows for expansion and contraction of pipes without damage to the roof.
Note:Both BITEC and NRCA reaffirm opposition to pipesand conduits being placed on roofs. However, wherethey are necessary, this type of roller supportis recommended
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Equipment frame or leg
Set bolts in elastomeric sealant
Metal cap flashing withreceiver for insert
Neoprene pad
Fasteners approx. 24" o.c.
Removablecounterflashing insert
BITEC modified bitumen baseflashing, up and over curb
Modified bitumen or asphaltbleed out at edges
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating.Extend 4" min. above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Note: This detail allows for roof maintenancearound the equipment or sign. The continuoussupport is preferred in lightweight roof systemsbecause the equipment weight can be spread over more supporting members where heavy structural systemsare used or where the load can be concentrated over a column.Clearance must be provided for removal and replacement of roofingand flashing between parallel supports.
4" min.
14" minimum space to thebottom of equipment
Fasteners approx. 8" o.c.at base flashing
Cant strip, securely nailedor set in bitumen
Roof insulation
Wood blocking, securelyfastened to deck with
appropriate fasteners,match insulation thickness
24. Pipe Support with Roller Assembly
25. Equipment or Sign Support Rail
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2" nominal
12" min.
12" min.
12" min.
12" min.
4" min.
Structural frame
Pipe column height -see table
Width - see table
See details#22 and #23
Note: This detail is preferable when the concentrated load can be located directly over columns or heavygirders in the structure of the building. This detailcan be adapted for other uses, such as sign supports.
26. Pipe and Flashing Clearances
27. Mechanical Equipment Stand
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Width of Equipment Height of Legs
up to 24" 14"
25 to 36" 18"
37 to 48" 24"
49 to 60" 30"
61" and wider 48"
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Modified bitumen sealaround all pipe penetrations
Set lead flange in modifiedbitumen sealant. Prime theflange top and bottom beforestripping. 4" min. flangewidth
Modified bitumen or asphaltbleed out at edges
Modified bitumen targetflashing over the field membrane joints
Rounded corners
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating
BITEC smooth surfacemodified bitumen collarmembrane, extend 6" min.beyond edge of metal flange
Base sheet or modifiedbitumen base as required
Note:Sheet lead minimum of 2-1/2 lbs. per foot.
Roll lead flashing 1" downinto the pipe
Roof insulation
Plumbing vent stack
Treated wood blocking
Modified bitumen sealant
4"
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Vent flange set inmodified bitumen sealant
or asphalt - prime top andbottom before installation
Loose insulation
Roof Deck
Insulation
Spun aluminumone-way pressure releasevent
Target flashing over field joints
Modified bitumen seal
Modified bitumen or asphaltbleed out at edges
Compaflash stick bitumen ormodified bitumen sealant(Do not use mastics with APP modified torchapplied membranes)
Rounded corners
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating
BITEC smooth surfacemodified bitumen collarmembrane, extend 6" min.beyond the vent flange
Base sheet or modifiedbitumen base as required
28. Plumbing Vent Flashing
29. Approved One-Way Roof Vent
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Wood curb,10" nominal height
Cant strip, set in bitumenor nailed
Wood blocking, secured todeck with appropriatefasteners, match theinsulation thickness
Metal sleeve where required(Insulate void for cold pipes)
High temperature Elastomeric sealantif not welded
Draw band or weld theumbrella to stack
Metal umbrella(Rain collar or storm collar)
Seal top of flashing withfabric tape and sealant
Counterflashing fastenedapprox. 12" o.c. with aminimum of 3 per side
Removable counterflashing
Fasteners approx. 8" o.c.
Modified bitumen or asphaltbleed out at edges
Rounded corners
BITEC modified bitumen baseflashing with 8" min. heightabove roof surface
BITEC modified bitumen fieldmembrane with optionalsurfacing or coating. Extend4" min. above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
NoteThis detail allows the opening to becompleted before the stack is placed. Themetal sleeve and the clearance necessary willdepend on the temperature of the material handledby the stack.
4" min.
Roofinsulation
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Custom-fittedsheet metal hood
Custom-fitted sheet metalor flex-tube collar
Slope pipes down away fromhood when possible.(See insert for drip ring)
BITEC modified bitumen baseflashing with 8" min. heightabove roof surface
Fasteners approx. 12" o.c.with min. 2 per side
Fasteners approx. 8" o.c.at base flashing
Rounded corners
Modified bitumen or asphaltbleed out at edges
BITEC modified bitumenfield membrane with optional surfacing or coating. Extend 4" min. above cant
Base sheet or modifiedbitumen base as required,extend 2" min. above cant
Insulate inside of metalwork in cold climate
Cant strip, set in bitumenor nailed
Wood blocking, secure todeck with appropriate
fasteners, matchinsulation thickness
Note:This detail shows anothermethod of eliminating pitch pocketsand a satisfactory method of groupingpiping that must come above the roof surface
DRIP RING DETAILMetaldrip ring
Sealant
Solder or sealant
4" min.
Roofinsulation
30. Hot Stack Flashing Curb
31. Piping Through Roof Deck
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Modified bitumen targetflashing over modifiedbitumen field membrane
Urethane sealant
Draw band
Metal rain collar
Insulation
Deck
2" min.clear
Field membrane
Base sheet
4"
Clean and prime pipe throughpitch pan, inside pitch pan,and top and bottom of flange
Sloped top layerof pourable sealer
Pourable sealer overnon-drip filler at bottom
Sheet metal pitch pan of min. 24 gauge galvanized
16 oz. copper;or other approved metals
Smooth modifiedbitumen flashingcollar
Modified bitumen or asphalt bleed out at edge
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Existing Roof Membrane
Inverted cap sheetover split, extend 2" overeach side of split
Roof Insulation or Deck
Clean and primearea on each side of split
Roof Split
Cap sheet
2"
8"min.
8"min.2"
Roof Insulation or Deck
32. Typical Pitch Pan
33. Split Repair
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Clean area to be repaired of any coatings or loosed surfacinggranules; spud any gravel to a clean, smooth surface. Prime areato be repaired and allow to dry thoroughly. Cut a strip of SPMseries, APM-4T or APM-4.5T cap sheet to extend 2" each side ofsplit. Lay the piece dry, granule side down, over the split. (Theuse of lightweight cap sheets is not recommended.)
Using material compatible with the existing roof, cut a strip of SPMseries, APM-4T or APM-4.5T cap sheet to extend 8" min. eachside of the DRY piece. Adhere in hot asphalt or torch into place asrequired for material being used.
APP or SBS cap sheets may be used over asphalt built up roofs.
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ROOF ASSEMBLY GENERAL REQUIREMENTS1) Systems warranteed for 15 or 20
years require complete removal ofall existing roofing and insulation, ifnot new construction.
2) NDL & Full System warrantiesrequire pre-approval, and completeremoval of all existing roofing andinsulation if not new construction.
3) Twelve (12) year warranteed sys-tems over wood decks will requireone or more of the following:
a. Minimum 3⁄4" tongue andgroove plywood decking.
b. A 1⁄2" minimum layer of roofinsulation, 1⁄2" gypsumboard or 1⁄4" Dens-Deck asa separation layer.
c. Minimum slope of 1⁄4" perfoot.
4) Twelve (12) year warranteed SBSsystems with mechanically fas-tened base sheets will require oneadditional mopped ply of UL TypeIV fiberglass ply sheet as an inter-
ply; with or without insulation.
5) Recover insulation is required overall previously graveled roofs or sin-gle ply roofs when pre-approved.
6) Mechanically fastened base sheetsover existing smooth surface roofs(non-graveled) will be allowed onlywhen pre-approved by BITEC’sTechnical Service Department.
7) One-way deck vents are requiredwith all recover systems, concretedecks, gypsum decks and decksusing all types of lightweight insu-lating fills.
8) Roof insulation may not be installedin direct contact with any lightweightconcrete or gypsum decks. A vaporretarder must first be mechanicallyfastened to the deck, with any insu-lation adhered to the vapor retarderin hot asphalt.
9) Metal base flashings are notacceptable.
10) Maximum height for base flash-
ings is 24". Any flashings abovethat height are considered “wallcoverings” and are not covered bywarranty.
11) Always refer to most recent UL, FMor other code agency listings orapprovals for specific requirementswhich are not listed in this manual.Assemblies shown on the follow-ing pages are for BITEC warrantycompliance, not necessarily forcode agency compliance. Al lrequirements are subject to changewithout notice.
12) Direct application of any BITECproduct over an existing mem-brane without a base sheet and/orrecover layer of insulation is notacceptable.
13) Cold applied systems require1⁄4" :12 minimum slope for warranty.
14) Maximum warranty for coldapplied adhesive systems is 10years.
The following Laying PatternDiagrams only show some typicalassemblies. Modifications may bemade to any of them to accommo-date many other situations. (SeeBUR-MOD section, pgs. 59-68)
There are numerous combina-tions possible when considering theavailable deck types, insulation andmembrane combinations. Interpliesmay be added to two ply systemsshown without adversely affectingthe UL classification for that assem-bly. For systems to be warranteed,BITEC may or may not allow hybridor modified systems allowed by othermanufacturers.
Pre-approval is required fromBITEC’s Manager of TechnicalServices for any extended warranty(over 12 years) or for any systems orassemblies considered unusual orquestionable by BITEC.
Cold adhesive may not be usedfor multi-ply systems requiring morethan two plies and consequently ten(10) years is the maximum warrantyperiod for these systems. Cold adhe-sives may not be used with any APPmembrane or SBS systems de-signed for torch application. Plasticcement must not be used with anyBITEC modified bitumen product.
Vapor retarder systems are notshown on any of these diagramsbecause BITEC neither designs orwarranties vapor retarder systems.Several conditions requiring vaporretarders are not warrantable byBITEC, such as swimming pools,freezer and cold storage buildings,and buildings with interior highhumidity conditions.
In some instances, a barrierboard of minimum 5⁄8" gypsum boardor 1⁄4" Dens-Deck may be substituted
for the roof insulation board for war-ranty purposes. Pre-approval will berequired. Under no circumstanceswill BITEC allow direct attachmentby torching or mopping to the bar-rier board materials. All membranesmust be mechanically fastened overthese materials.
Refer to individual insulationmanufacturer’s FM Approvals and/orUL Listings for proper attachment tovarious decks. Fastening patternrequirements vary considerably fordifferent types of insulation and thick-nesses, and may change withoutnotice.
Warranty requests must be sub-mitted for pre-approval before instal-lation of the membrane begins.Without prior approval, warrantiesmay be denied.
LAYING PATTERNS DIAGRAMS
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For 15 and 20 year systems–––––––––––––––––––––––––––––1. Approved Roof Insulation attachedper specifications, over suitable sub-strate; required for 15 or 20 year systems.
2. UL Type G2 Fiberglass Base Sheetinstalled as per specification in hotasphalt.
3. BITEC Smooth APP or SBS InterplySheet applied according to specifica-tion for particular system application.
4. BITEC APP or SBS Cap Sheetapplied according to specification forthe particular cap sheet application.
5. Approved Roof Coating required onAPS-4T. Roof coating may be requiredon mineral surfaced membranes for ULand FM compliance. Gravel surfacing isrequired for warranty on SPS-3H mem-brane. A warranty fee is required for all15 & 20 year systems.
1. Typical Three-Ply System Over Insulation������
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11Insulation
22G2 Fiberglass
Base Sheet
33BITEC
Interply orSmooth
Cap Sheet 44BITEC
Cap Sheet
55OptionalCoating
or surfacing
Mopping asphaltor heat welded Mopping
asphaltor heat welded
Mopping asphalt
55
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12 "
12 "
11Insulation
22G2 Fiberglass
Base Sheet
33BITEC
Interply orSmooth
Cap Sheet 44BITEC
Cap Sheet
55OptionalCoating
Mopping asphaltor heat welded Mopping
asphaltor heat welded
Mopping asphalt
For 15 or 20- year Systems.–––––––––––––––––––––––––––––1. Approved Insulation attached perspecifications, over suitable substratefor 15 or 20 year systems.
2. UL Type G2 Base Sheet fastenedthrough insulation to deck with appro-priate fasteners and plates, 12" o.c. atbase sheet laps and one row 12" o.c.along center of sheet.
3. Bitec Smooth APP or SBS InterplySheet applied according to specifica-tion for particular cap sheet application
4. Bitec APP or SBS Cap Sheet appliedaccording to specification for particularcap sheet application.
5. Approved Roof Coating required onAPS-4T. Roof coating may be requiredon mineral surfaced membranes for ULand FM compliance. Gravel surfacing isrequired for warranty on SPS-3H mem-brane. A warranty fee is required for all15 & 20 year systems.
2. 3-Ply System, Mech. Attached Base Sheet & Insulation
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3. Mechanically Attached Base Sheet & Insulation������
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11Insulation
22G2 Fiberglass
Base Sheet
33BITEC
Cap Sheet
44 OptionalCoating
Mopping asphaltor heat welded
Pre-securementfasteners
12 "
12 "
12 yr. max. warranty as shown for APP systems. 10 yr. max. warranty asshown for SBS; For 12 yr. warrantyw/SBS systems, an add’l interply (notshown) of Type IV ply sheet is req’d.–––––––––––––––––––––––––––––1. Approved Roof Insulation over suit-able substrate, pre-secured per FMRCrequirements.2. UL Type G2 Fiberglass Base Sheetfastened through insulation to deckwith appropriate fasteners and plates,12" o.c. at base sheet laps and one row12" o.c., down center of sheet.3. BITEC APP or SBS Cap Sheetapplied according to specification forparticular cap sheet application.4. Approved Roof Coating required onSPS-3H; optional on APS-4T for 10years, required for 12 years. Coatingmay be required on mineral surfacedmembranes for UL or FM compliance.A warranty fee is required for uncoatedAPS-4T for 10 years.
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9 "
18 "11"
NailableDeck
11G2 Fiberglass
Base Sheet
22BITEC
Cap Sheet
33OptionalCoating
Mopping asphaltor heat welded
10 year maximum warranty–––––––––––––––––––––––––––––1. UL Type G2 Fiberglass Base Sheetor Vented Base Sheet or an invertedG3 Fiberglass cap sheet fastened oversuitable deck with appropriate fasten-ers and plates, 9" o.c. at base sheetlaps and two rows 18" o.c. staggered,11" apart down center of sheet.
2. BITEC APP or SBS Cap Sheetapplied according to specification forparticular cap sheet application.
3. Approved Roof Coating required onSPS-3H; optional on APS-4T. Coatingmay be required on mineral surfacedmembranes for UL or FM compliance.A warranty fee is required for uncoatedAPS-4T.
4. Nailable Deck, without Insulation
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12 yr. max. warranty for 3 ply systemas shown. *A modified bitumen inter-ply is required for 15 or 20 yr. systems; See specific system requirements.–––––––––––––––––––––––––––––1. UL Type G2 Fiberglass Base Sheetor Vented Base Sheet fastened with ap-propriate fasteners and plates; 9" o.c. atlaps and 2 rows 11" apart down centerof sheet, 18" o.c. staggered, or asrequired for FM approval.2. UL Type IV Fiberglass Ply Sheetinstalled in a solid mopping of hotasphalt per specification. *A mod bitinterply is required for 15 and 20 yearsystems.3. BITEC APP or SBS Cap Sheetapplied according to specification forparticular cap sheet application.4. Approved Roof Coating required onSPS-3H and APS-4T. Coating may berequired on mineral surfaced mem-branes for UL or FM compliance. Awarranty fee is required for 15 and 20year warranties.5. One-Way Vents required.
10 year or 12 year max. warranty for 2 ply system as shown. A modifiedbitumen interply (not shown) is req’d.for 15 and 20 year systems.–––––––––––––––––––––––––––––1. Approved Insulation installed in asolid mopping of hot asphalt, or me-chanically fastened. Concrete deckmust first be primed and allowed tothoroughly dry when asphalt is used.2. UL Type G2 Fiberglass Base Sheetinstalled in a solid mopping of hotasphalt per specification.3. BITEC APP or SBS Cap Sheetapplied according to specification forparticular cap sheet application.4. Approved Roof Coating required onSPS-3H; optional on APS-4T for 10years, required for 12, 15 and 20 years.Coating may be required on mineralsurfaced membranes for UL or FMcompliance. A warranty fee is requiredfor 15 and 20 years.5. One-Way Vents required over con-crete decks.
5. Nailable Lightweight Concrete Deck
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18 "
11"
11G2 Fiberglass
Base Sheet
22Type IV
FiberglassPly Sheet 33
BITECCap Sheet
44OptionalCoating
Mopping asphalt
Mopping asphaltor heat welded
LightweightConcreteNailable
Deck
55Vents
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22G2
FiberglassBase Sheet 33
BITECCap Sheet
44OptionalCoating
Mopping asphalt
Mopping asphaltor fastened
Mopping asphaltor heat welded 55
Vents
6. Concrete Deck, Fully Adhered
57
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8. Typical Re-Cover System
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ExistingRoof
Surface(Vents required)
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11Re-CoverInsulation
22G2
FiberglassBase Sheet 33
BITECCap Sheet
44OptionalCoating
Mopping asphalt
Mopping asphalt
Mopping asphaltor heat welded 55
Vents
10 year or 12 year max. warranty isavailable. A 15 or 20 year warranty isnot available without tear-off ofexisting assembly.–––––––––––––––––––––––––––––1. Approved Re-Cover Insulation atleast one layer (1⁄2" min. thickness),mechanically fastened with appropriatetype and quantity of fasteners, suitablefor deck and insulation board size.2. UL Type G2 Fiberglass Base Sheetinstalled in a solid mopping of hotasphalt.3. BITEC APP or SBS Cap Sheetapplied according to specification forparticular cap sheet application.4. Approved Roof Coating required forall smooth surface sheets. Coating maybe required on mineral surfaced mem-branes for UL and FM compliance. Nowarranty fee for 10 or 12 year systems.10 year maximum warranty foruncoated APS-4T; a warranty fee isrequired.5. One-Way Vents required.
12 Year maximum warranty for SBS or APP membranes–––––––––––––––––––––––––––––1. Approved Roof Insulation attachedper specification, over a suitable sub-strate.
2. UL Type G2 Fiberglass Base Sheetinstalled as per specification in hotasphalt.
3. BITEC APP or SBS Cap Sheetapplied according to specification forparticular cap sheet application.
4. Approved Roof Coating required forall smooth surface sheets. Coating maybe required on mineral surfaced mem-branes for UL and FM compliance. Nowarranty fee for 10 or 12 year systems.10 year maximum warranty foruncoated APS-4T; a warranty fee isrequired.
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11Insulation
22G2 Fiberglass
Base Sheet
33BITEC
Cap Sheet
44Coating
reqired if notMineral Surfaced
Mopping asphaltor heat welded
Mopping asphalt
7. Mech. Attached Insulation, Mopped Base Sheet
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B U R - M O D S Y S T E M S
SCOPE AND PURPOSETo provide alternate roofing
assemblies within our existingproduct lines, allowing for moreeconomical systems within theguidelines of industry competition.The BITEC BUR-MOD assem-blies offer system parity withoutcompromising BITEC quality andreputation.
SYSTEMCONFORMANCE
Type IV and Type VI Ply sheetsmust conform to ASTM D2178-97a Standard Specification forAspha l t G lass Fe l t Used inRoofing and Waterproofing; andClassified G1 by UnderwritersLaboratories, Inc.
G2 Base sheet must conformto ASTM D4601-97a StandardSpecification for Asphalt-Coated
Glass Fiber Base Sheet Used inRoofing; and Classified G2 byUnderwriters Laboratories, Inc.
BUR-MOD WARRANTIES
BITEC offers 10, 12, 15 and 20year warranties for BUR-MODsystems. Provisions for NDL andFULL SYSTEM warranties arealso available when pre-approvedby BITEC's Manager of TechnicalServices. Warranty Request formsshould be received on all projectsprior to start of the roofing appli-cation for review and/or pre-approval by BITEC's TechnicalServices Department.
Warranty charges are subjectto change without notice and areavai lable by contact ing yourBITEC representat ive or theTechnical Services Department.
IMPORTANT NOTICEThe roofing contractor, archi-
tect, specifier, or user of thesesystems must be familiar with allBITEC, INC. standard specifica-tions for both Modified Bitumensystems and these hybrid systemswhich BITEC refers to as BUR-MOD SYSTEMS, for proper spec-ification, detailing and installation.
Pertinent information may befound in other sections of thismanual. Before starting any pro-ject using BITEC products, it isrecommended that all publicationsrelative to the project and BITECproducts be consulted and under-stood.
Any questions should be di-rected to the BITEC TechnicalServices Dept. at (800) 535-8597.
BUR-MOD SECTION CONTENTS
Installation Parameters.................................................................................................. 60
Base Sheet and Ply Sheet Product Trade Names..........................................................61
Specification Numbers Chart .........................................................................................61
Typical BUR Systems, 3 and 4-ply ............................................................................62-63
DETAIL DRAWINGS:
#BM1 ........Draining Edge with Gutter .....................................................................64
#BM1a ......Draining Edge with Gutter, alternate.....................................................64
#BM2 ........Flat Draining Edge (Drip Edge, Gravel Stop).........................................65
#BM2a ......Flat Draining Edge (Drip Edge, Gravel Stop), alternate........................65
#BM7 ........Multi-Ply Base Flashing at Plywood Parapets .......................................66
#BM7A......High Parapet Base Flashing at Plywood Walls......................................66
#BM7B......High Parapet Base Flashing at Masonry Walls .....................................67
#BM7C......Multi-Ply Base Flashing at Masonry Parapets .......................................67
#BM28 ......Plumbing Vent Flashing.........................................................................68
#BM30 ......Hot Stack Flashing Curb........................................................................68
NOTE: Lower case "a" designates an alternate detail, and upper caseletters with detail numbers indicate additional similar details.
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I N S TA L L AT I O N PA R A M E T E R S
SECTION 1.00
INSULATIONIn all cases a minimum of 1⁄2"
thick perlite or high density woodfiber board insulation wil l beinstalled as a buffering layer. Otherinsulations are acceptable for usewithin these systems provided theinsulation manufacturer’s specifi-cations and BITEC’s specificationsare followed. See the GeneralRequirements SECTION 6.02 ofthis manual.
Insulation must be used with allsystems unless its use has beenwaived by BITEC’s TechnicalServices Department.
SECTION 2.00
BASE SHEETSAND PLY SHEETS
Unless otherwise specified allbase and p ly sheets wi l l beinstalled using hot asphalt as perBITEC’s published requirementswhich determine the type ofasphalt to be used, asphalt appli-cation rate, and asphalt applica-tion temperature. See the GeneralRequirements SECTIONS 1.02,1.03 and 1.04 of this manual.
Under no circumstances will anyType IV or Type VI Ply Sheet bemechanically attached. Under cer-tain conditions, however, the G2base sheet called for in the sched-ule may be mechanically attached.
Allowance for this must be pre-approved by BITEC’s TechnicalServices Department. For para-meters involving mechanicallyattaching G2 base sheets refer toSECTION 2.02, on pg.17 of thismanual.
Acco rd i ng t o The NRCARoof ing and Water proof ingManual:
“...plies shall be embeddedinto a fluid, continuous applica-
tion of asphalt. The asphalt shallbe applied in such a way that atno place will felt touch felt. Allplies of felt shall be broomed intoplace as they are applied to aidin adhesion ...”
SECTION 3.00
CAP SHEET Cap sheet shall be installed as
per specifications given in theGeneral Requirements SECTIONS2.03 and 2.04, pgs.17-18 of thismanual.
SECTION 4.00
SPECIFICATIONSAND DETAILS
Primary consultation for thisinformation shall come from thisbook, and The NRCA Roofing andWaterproofing Manual.
All applicable publications shallbe consulted before work begins.
Some details for BUR-MOD sys-tems are included in the followingsection of this manual. Thesedetails are simply variations of thedetails used for modified bitumensystems.
Typically, for BUR-MOD sys-tems, all Modified Bitumen Detailsmay be adapted to be used withBUR-MOD Systems.
This is generally accomplishedby using the base and/or plysheets in lieu of the base and/orinterply membrane of the modifiedbitumen system.
For any specific details notshown, contact BITEC TechnicalServices Dept. at (800) 535-8597.
SECTION 5.00
ACCEPTABLEBASE AND PLY SHEETBase sheet and ply sheet from
the fol lowing companies are
acceptable for use within theBITEC Bur-Mod systems:
1) BITEC, INC.2) TAMKO Roofing Prod., Inc.3) Black Warrior Roofing, Inc.4) Fields Corporation5) Johns Manville (Schuller)No other base or ply sheet shall
be used other than those givenabove unless approval is grantedfrom BITEC’s Technical ServiceDepartment.
The above companies publishtheir compliance with standards forthe products shown on the nextpage, Table 1.
SECTION 6.00
APPROVAL FOR USE OF BUR-MOD SYSTEMSAS A SUBSTITUTE FOR
OUR STANDARDWARRANTY SYSTEMSPre-approval by the Technical
Services Department is necessaryin order to obtain a warranty forthese systems.
All Warranty Requests must besubmitted in a reasonable amountof time prior to the start of the pro-ject for pre-approval.
As is always done with anyextraordinary warranty scenario, aspecial warranty document is used.
However, our standard LimitedInsured Roofing Warranty is applic-able for any of the following sys-tems listed in Table 2, next page.
SECTION 7.00
SPECIFICATIONNUMBERS
Specification number format willremain virtually the same with thefollowing changes shown in charton the next page.
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Table 1
Table 2
FOR EXAMPLE:SPM-3.5H.2.20.BMG = SPM-3.5H.nailable situation.twenty year system.BUR-MOD G2 as base
APS-4T.1.15.BM4 = APS-4T.non-nailable situation.fifteen year system.BUR-MOD Type IV as interplySPS-3H.2.12.BM = SPS-3H.nailable situation.twelve year system.BUR-MOD Type IV or VI as base
APPROVED PRODUCTS - Base Sheet and Ply Sheet Product Trade Names
Company Base Sheet Type IV Ply Sheet Type VI Ply Sheet(ASTM D 4601, Type II) (ASTM D 2178, Type IV) (ASTM D 2178, Type VI)
BITEC, INC. BETA BASE BETA PLY IV BETA PLY VI
TAMKO Roofing Products, Inc. GLASS-BASE TAM-PLY IV TAM-GLASS PREMIUM
Black Warrior Roofing, Inc. Arrowglass Base Arrowglass IV Arrowglass VI
Fields Corporation Fields F51 Fields F54 Fields F56
Johns Manville (Schuller) GlasBase GlasPly IV GlasPly Premier
Johns Manville (Schuller) PermaPly No. 28 PermaPly R
SPECIFICATION NUMBERSWarranty Insulation
Period Required? .......1st Ply .......2nd Ply .......3rd Ply ........4th Ply.........Surfacing......Spec Suffix
12 Years Yes .............4 or 6 .........4 or 6 ........APS-4T.............................Coating .............BMor Less Yes .............4 or 6 .........4 or 6 ........SPS-3H ............................Coating..............BM
Yes .............4 or 6 .........4 or 6.........Other* .........................................................
15 Years Yes ...............G2 .............. 6 ...........APS-4T.............................Coating.............BM6or Less Yes ...............G2 .............. 6 ...........SPS-3H .............................Gravel..............BM6
Yes ...............G2 .............. 6............Other* ......................................................BM6Yes ...............G2 ...............4.................4 ............APS-4T .........Coating.............BM4Yes ...............G2 ...............4.................4............SPS-3H ..........Gravel..............BM4Yes ...............G2 ...............4.................4.............Other* ..................................BM4
20 Years Yes.................6 ................6.................6 ............APS-4T .........Coating.............BM6or Less Yes.................6 ................6.................6............SPS-3H ..........Gravel..............BM6
Yes.................6 ................6.................6............APM-4T ..................................BM6Yes.................6 ................6.................6 ..........APM-4.5T.................................BM6Yes.................6 ................6.................6 ..........SPM-4.5T.................................BM6Yes.................6 ................6.................6 ..........SPM-3.5H ................................BM6Yes.................6 ................6.................6 ........SPM-4H/250...............................BM6Yes.................6 ................6.................6 ...........SPM-4H ..................................BM6Yes ...............G2 ...............6.................6 ............APS-4T .........Coating ............BMGYes ...............G2 ...............6.................6............SPS-3H ..........Gravel .............BMGYes ...............G2 ...............6.................6............APM-4T..................................BMGYes ...............G2 ...............6.................6 ..........APM-4.5T ................................BMGYes ...............G2 ...............6.................6 ..........SPM-4.5T ................................BMGYes ...............G2 ...............6.................6 ..........SPM-3.5H ................................BMG
Other* = All other BITEC Cap Sheets except ISA-4T and EGM-2H.
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B U R - M O D S Y S T E M S
APPLICATION OF PLIES: Embed all plies using ASTMD312 Type III or Type IV asphalt. Application rate of 25lb/sq. is essential. Application of asphalt must provide a
continuous and uninterrupted layer of asphalt to whichall plies are to be embedded. In no area should asphaltbe applied as to allow felt to touch felt.
1. Approved Roof Insulationattached per specifications, over suitable substrate.
2. Type IV or VI Fiberglass plysheets (2 Plies), ASTM D2178-97a(UL Type G1), per specificationrequirement, installed in hot asphalt.
3. BITEC APP or SBS Cap Sheetapplied according to specification.
4. Approved Roof Coating requiredfor smooth surface sheets. Coatingmay also be required for any mineralsurfaced membrane for compliancewith UL & FM requirements. No war-ranty fee is required, except for NDLwarranties.
1. Approved Roof Insulationattached per specifications, over suitable substrate.
2. Type VI Fiberglass ply sheets, (3plies) ASTM D2178-97a (UL TypeG1), per specification requirement,installed in hot asphalt.
3. BITEC APP or SBS Cap Sheetapplied according to specification.
4. Approved Roof Coating requiredfor smooth surface APS-4T. Coatingmay also be required for any mineralsurfaced membrane for compliancewith UL & FM requirements. Smoothsurface SPS-3H must be surfacedwith a flood coat of hot asphalt andASTM D1863-93 roofing gravel. Awarranty fee is required.
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36"
24"111/3"
12" 10"
11INSULATION
393/8"
191/2"
33CAP
33CAP
22PLY VI
SHEETS 44COATING
2. Typical 4-Ply System 3 Ply Sheets, Cap Sheet
- 20 Year System -������������������������������������������
36"
36"
27" 17"
9" 7"
393/8"
191/2"
11INSULATION
33CAP
33CAP
22PLY
SHEETS
44COATING
1. Typical 3-Ply System 2 Ply Sheets, Cap Sheet
- 10 & 12 Year Systems -
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B U R - M O D S Y S T E M S
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Full Width
36"
36"
18"
11INSULATION
22FIBERGLASSBASE SHEETS
Full Width 33PLY
SHEETS
393/8"
44CAP
SHEETS
55COATING
Half WidthPly Sheet
Full Width
Full Width
1. Approved Roof Insulation attachedper specifications, over suitable sub-strate, required for 15 or 20 year sys-tems, except on lightweight insulatingconcrete decks.
2. UL Type G2 Fiberglass Base Sheetinstalled as per specification, either inhot asphalt or mechanically attached.
3. Type IV or Type VI Fiberglass plysheets, ASTM D2178-97a (UL TypeG1), 2 plies, per specification require-ment, installed in hot asphalt. Type IVfor 15 year systems; Type VI for 20year systems.
4. BITEC APP or SBS Cap Sheetapplied according to specifications.
5. Approved Roof Coating requiredfor smooth surface APS-4T. Coatingmay also be required for any mineralsurfaced membrane for compliancewith UL & FM requirements. Smoothsurface SPS-3H must be surfacedwith a flood coat of hot asphalt andASTM D 1863-93 roofing gravel. Awarranty fee is required.
APPLICATION OF PLIES: Embed all plies using ASTMD312 Type III or Type IV asphalt. Application rate of 25lb/sq. is essential. Application of asphalt must provide a
continuous and uninterrupted layer of asphalt to whichall plies are to be embedded. In no area should asphaltbe applied as to allow felt to touch felt.
1. Approved Roof Insulation attachedper specifications, over suitable sub-strate, required for 15 year systems,except on lightweight insulating con-crete decks.2. UL Type G2 Fiberglass Base Sheetinstalled as per specification, either inhot asphalt or mechanically attached.3. Type VI Fiberglass ply sheets,ASTM D2178-97a (UL Type G1), perspecification requirement, installed inhot asphalt. 4. BITEC APP or SBS Cap Sheetapplied according to specification.5. Approved Roof Coating requiredfor smooth surface APS-4T. Coatingmay also be required for any mineralsurfaced membrane for compliancewith UL & FM requirements. Smoothsurface SPS-3H must be surfacedwith a flood coat of hot asphalt andASTM D1863-93 roofing gravel. Awarranty fee is required.
4. 4-Ply with Base Sheet 1 Base Ply, 2 Ply Sheets, Cap Sheet
- 15 & 20 Year Systems -������������������������������������������
36"
36"
18"
11INSULATION
22FIBERGLASSBASE SHEETS
Full Width
33PLY VI
SHEETS393/8"
44CAP
SHEETS
55COATING
Half WidthPly Sheet
3. 3-Ply with Base Sheet 1 Base Ply, 1 Ply Sheet, Cap Sheet
- 15 Year Systems -
��������
4" min. 4" min.
BITEC flashing membraneedge strip
BITEC field membrane, turned down over edge with optional surfacing or coating
One or two plies of Type IV or Type VI interply felts, set in hot asphalt
Base sheet or 1st ply as required
Wood blocking, secured with appropriate fasteners; match insulation thickness
Metal edge trim with flange primed top and bottom and
set in modified bitumen sealant. Nails 3" o.c.
staggered.
Gutter with straps or supports as
required by project details
When face dimension exceeds 2.5", a continuous hook strip may be required
Roof insulation
Roof deck
Seal with modified bitumenor asphalt bleed out at edges
1" minimum height difference
�����4"
One or two plies of Type IV or Type VI interply felts, set in hot asphalt
CAUTION: This alternate edge detail is not in compliance with FM LossPrevention Data Bulletin I-49 for Perimeter Flashings
Seal with modifiedbitumen or asphaltbleed out at edges
Gutter with strapsas required
1" minimumheight difference
Metal edge trim with flange primed top & bottom and set in
modified bitumen sealant. Nails 3" o.c. staggered.
RE: Detail #2
Roof insulation
Roof deck
BITEC cap membrane over metal edge flashing.
BITEC smooth membrane, turned down over edge. Extend min. of 6 - 8" past edge of metal flange
Base sheet or 1st ply as required.
Wood blocking, secured with appropriate fasteners; match insulation thickness
When face dimension exceeds 2.5", a continuous hook strip may be required
1. Draining Edge with Gutter
1a. Draining Edge with Gutter, alternate
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BURMOD
BURMOD
��������4" min. as specified
4 nails1/4" min. space,
fill with sealant5 nails
sealantbetween joints
LAP JOINT DETAIL (preferred) JOINT COVER DETAIL (alternate)
1-1/2"
1/2"
3"
3"
(PLAN VIEWS)
4" m
in.
4" min.
4" min.
BITEC membrane edge strip
Metal fascia, gravel stop with low raised edge or plain drip
edge without raised lip. (4" min. flange width) Prime
flange top and bottom
Modified bitumen sealant under metal flange
Wood blocking, secured with appropriate fasteners, match
insulation thickness
Roof flange, 4" min. width
Continuous cleat
Roof insulation
Steel deck
Modified bitumen or asphalt bleed out at edges
BITEC field membrane turned down over edge with optional surfacing or coating
Fasteners 3" o.c., staggered as shown
Base sheet or first ply as required.
One or two plies of Type IV or Type VI interply felts, set in hot asphalt
��������
Modified bitumen or asphalt bleed out at edge
BITEC smooth membrane turned down over edge
Fasteners 3" o.c., staggered as shown
Base sheet or first plyas required.
One or two plies of Type IV or Type VI interply felts, set in hot asphalt
1-1/2"3"
4"
6 to 8"
BITEC field membrane overmetal edge flashing
Metal fascia, gravel stop with low raised edge or plain drip
edge without raised lip. (4" min. flange width) Prime
flange top and bottomRoof flange, 4" min. width
Modified bitumen sealant under metal flange
Wood blocking, secured with appropriate fasteners, match
insulation thickness
Continuous cleat
Roof insulation
Steel deck
1/2"
(See Lap Joint detail - #2)
CAUTION: This alternate edge detail is not in compliance with FM LossPrevention Data Bulletin I-49 for Perimeter Flashings
2. Flat Draining Edge (Drip Edge, Gravel Stop)
2a. Flat Draining Edge (Drip Edge, Gravel Stop), alternate
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���� �
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24" max.
DR
YD
RY
DRY
4" min.
BITEC base flashing (8" min.; 24" max. height), extend 2" min. up under wall flashing
BITEC base flashing interply membrane, extend 2" min. up under next membrane
BITEC modified bitumen membrane with optional surfacing or coating, extend 4" minimum above cant
Base sheet and/or first ply as required, fully adhered, extend 2" min. above the cant
One or two plies of Type IV or Type VI interply felts, set in hot asphalt, extend to 4" min. above cant
Coping - Designed to meet FMRC 1-49 requirements
Fasteners 8" o.c. above the base sheet
Fasteners approx. 18" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
Wall flashing membrane
Interply membrane(s)
Roof insulation
Exterior plywood on cleat or tapered blocking to provide shape
Fiberglass G2 base sheet, nailed tight to plywood, fastened 8" o.c.
each direction and unattached over the lower base sheet
Exterior siding, brick, etc. (wood framed wall construction shown
Cant strip, securely nailed or set in bitumen
Wood blocking, secured with appropriate fasteners, match
insulation thickness
Solid wood blocking
Note: This detail should be used only where the deck is supported by the wall. An expansion joint detail should beused for non wall-supported deck. Contact BITEC TechnicalServices for suitability of attachment if building movement is not a concern.
Modified bitumen or asphalt bleed out at edge of base flashing
���������
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24" max.
Exterior plywood on cleat or tapered blocking to
provide shape
Fiberglass G2 base sheet, nailed tight to plywood, fastened 8" o.c.
each direction and unattached over the lower base sheet
Exterior siding, brick, etc. (wood framed wall construction shown)
Cant strip, securely nailed or set in bitumen
Wood blocking, secured with appropriate fasteners, match
insulation thickness
Note: This detail should be used only where the deck is supported by the wall. An expansion joint detail should beused for non wall-supported deck. Contact BITEC TechnicalServices for suitability of attachment if building movement is not a concern.
DR
Y
DR
Y
DRY
4" min.
Coping - Designed to meet FMRC1-49 requirements
Wall flashing membrane
Fasteners approx. 18" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
BITEC base flashing membrane, extend 2" min. under wall flashing membrane
Fasteners 8" o.c. above base sheet
BITEC modified bitumen membrane with optional surfacing or coating extend 4" min. above cant
First and second ply as required, extend 2" min. above the cant, set in hot asphalt.
Solid wood blocking
Modified bitumen or asphalt bleed out at edge of base flashing
7. Multi-Ply Base Flashing at Plywood Parapets
7A. Base Flashing at Plywood Parapets
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For 10 or 12 Yr. Warranty Only
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BURMOD
Required for 15 & 20 Yr. Warranty
���
����
���
��
������
�����
Note: This detail should be used only where thedeck is supported by the wall. An expansion jointdetail should be used for non wall-supported deck. ContactBITEC Technical Services if building movement is a concern.
24" max.
4" min.
BITEC base flashing membrane, extend 2" minimum up under wall flashing membrane
BITEC modified bitumen membrane with opt. surfacing or coating, extend 4" min. above cant
1st and 2nd ply as required, fully adhered, extend 2" min. above the cant. Set in hot asphalt.
Exterior plywood on cleat or tapered blocking to provide shape
Cant strip, securely nailed or set in bitumen
Wood blocking, secured with appropriate fasteners, match insulation thickness
Fasteners 8" o.c. above base sheet
Coping - Designed to meet FMRC1-49 requirements
Wall flashing membrane
Fasteners approx. 18" o.c. at coping
Fasteners 8" o.c.
Sealant
Termination bar
Counterflashing
Solid wood blocking
Prime masonry surfaces
Exterior siding, brick, etc.
Modified bitumen or asphalt bleed out at edge of base flashing
������
���
�����
��
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Note: This detail should be used only where thedeck is supported by the wall. An expansion jointdetail should be used for non wall-supported deck. ContactBITEC Technical Services if building movement is a concern.
Modified bitumen or asphalt bleed out at edge of base flashing
Base sheet and/or 1st ply as required, fully adhered, extend 2" min. above the cant
BITEC base flashing membrane,extend 2" up under wall flashing membrane
BITEC base flashing interply membrane, extend 2" min. up under the next membrane
BITEC modified bitumen membrane with optional surfacing or coating, extend 4" minimum above cant
One or two pies of Type IV or Type VI interply felts set in hot asphalt; extend to 4" above the cant
Fasteners 8" o.c. above the base sheet
Fasteners approx. 18" o.c. at coping
Coping - Designed to meet FMRC1-49 requirements
Fasteners 8" o.c.
Termination bar
Counterflashing
24" max.
Wall flashing membrane
Interply membrane(s)
Solid wood blocking
Prime masonry surfaces
Exterior plywood on cleat or tapered blocking to
provide shape
Exterior siding, brick, etc. (masonry wall
construction shown)
Cant strip, securely nailed or set in bitumen
Wood blocking, secured with appropriate fasteners, match
insulation thickness
Sealant
4" min.
7B. High Parapet Base Flashing at Masonry Walls
7C. Multi-Ply Base Flashing at Masonry Parapets
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Required for 15 & 20 Yr. Warranty
For 10 or 12 Yr. Warranty Only
BURMOD
BURMOD
�������������Note:
Sheet lead minimum of 2-1/2 lbs. per foot.
4"
Roll lead flashing 1" down into the pipe
Modified bitumen or asphalt seal around all pipe penetrations
Modified bitumen target flashing over the field membrane joints.
Base sheet or 1st, and 2nd ply as required
BITEC modified bitumen field membrane with optional surfacing or coating
Set lead flange in modified bitumen sealant. Prime the flange top and bottom before stripping. 4" min. flange width
BITEC smooth surface modified bitumen collar membrane, extend 6" min. beyond edge of metal flange
Roof insulation
Plumbing vent stack
Treated wood blocking
Modified bitumen sealant
Rounded corners
Modified bitumen or asphalt bleed out at edges
���������
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NoteThis detail allows the opening to becompleted before the stack is placed. Themetal sleeve and the clearance necessary willdepend on the temperature of the material handledby the stack.
4" min.
Roofinsulation
Wood curb,10" nominal height
Cant strip, set in bitumen or nailed
Metal sleeve where required (Insulate void
for cold pipes)
Wood blocking, secured to deck with appropriate fasteners, match the insulation thickness
High temperature Elastomeric sealant if not welded
BITEC modified bitumen base flashing with 8" min. height above roof surface
BITEC modified bitumen field membrane with optional surfacing or coating. Extend 4" min. above cant
Base sheet or 1st, and 2nd ply as required, extend 2" min. above cant. Set Type IV & Type VI ply felts in hot asphalt
Draw band or weld the umbrella to stack
Metal umbrella(Rain collar or storm collar)
Seal top of flashing with fabric tape and sealant
Counterflashing fastenedapprox. 12" o.c. with aminimum of 3 per side
Removable counterflashing
Fasteners approx. 8" o.c.
Rounded corners
Modified bitumen or asphalt bleed out at edges
28. Plumbing Vent Flashing
30. Hot Stack Flashing Curb
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For 10 or 12 Yr. Warranty Only
BURMOD
BURMOD
For 10 or 12 Yr. Warranty Only
GE
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N O T E S
All Information is given in good faith, but nor-mal tolerances of manufacture and testing willapply. BITEC reserves the right to improveand change its products at any time withoutprior notice or advice. The use of BITEC prod-ucts is determined by local conditions and indi-
vidual requirements of each contract. In con-sideration of the many factors involved, BITECcannot be held responsible for the applicationof its products and for conditions beyond itscontrol. All claims filed against BITEC war-ranties will be subject to the provisions set
forth at the date of warranty issuance, andany addendums thereto. Under no circum-stances will BITEC be held liable for any dam-age, whether personal injury or property dam-age, which occur during or after the applicationof the membrane.
TM
Visit our web site at www.bi-tec.com
MANUFACTURERS OF ADVANCED TECHNOLOGY WATERPROOFING MEMBRANESP.O. Box 497 • Morrilton, Arkansas 72110 • Fax (501) 354-3019 • Phone (800) 535-8597
#4-3M-01/02-6
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