Engineered Wood Sustainability And Green Building Practices Slide Show
Post on 02-Jul-2015
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Green Building Practices
For Wood Frame Construction
Engineered Wood, Sustainability
and Green Building Practices
Learning Objectives
After this session, you will be equipped to :
Define and Discuss Sustainability Issues
Compare construction materials for “green”
compatibility
Identify and select various Green Rating Tools
Compare/contrast Green Building Programs
Evaluate various EWP products based on the
deconstruction/reconstruction principle
Discuss EWP framing systems recognized as
“green” by current Green Build programs.
Energy Facts
Energy doesn’t grow on trees
Decisions are now being made based on
energy costs and sustainability
A New Vocabulary
Sustainability RenewabilityLife Cycle
Costs
Carbon Sequestration
Carbon Footprint
Embodied Energy
A New Vocabulary
BuildingGreen
LEEDGreen
Building Standard
Green Globes
Charrette
Components of Green Building
Resource Efficiency
Energy Efficiency
Environmental Impact
Renewable Resources?
Wood Concrete Steel
Insulating Value? Yes NO NO
Renewable? Yes NO NO
Low Energy Cost to produce?
Yes NO NO
Purifies the air? Yes NO NO
Potentially Unlimited Supply?
Yes NO NO
Forestry FactsWood is renewable and sustainable
Source: APA
Wood is Good for the
environment
US Raw Material Production and Total Energy Used
Source: APA
Nature’s Air Purifier!
A growing forest produces 1 ton of oxygen and absorbs 1.4 tons of carbon for every ton of wood
Mature trees slow in their absorption rate of CO2
Harvesting insures that the carbon is locked in the wood (Carbon Sequestration) .
Decaying trees release stored carbon back into the atmosphere
New trees with rapid absorption rates can be replanted to continue this air purification.
Source: APA
Benefits of Wood vs. Steel and
Concrete
high insulating and acoustic properties
recycling and resource recovery rates
low pollution rates in harvesting and milling
http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html
Lifecycle Analysis
Resource Extraction
Manufacturing
Onsite Construction
Building Occupancy & Maintenance
Building Demolition
Disposal, Reuse or Recycling
Source:
http://www.athenasmi.org/
about/lcaModel.html
Comparison of Materials
5 times more energy to produce 1
ton of cement ·
14 times more energy to produce 1 ton of glass.
24 times more energy to produce 1 ton of steel.
126 times more energy to produce 1
ton of aluminum.
Source: APA
LCA Wood vs. Steel and Concrete
CORRIM Study Results:
Wood vs. Steel: 17% embodied energy
savings with wood
Wood vs. Concrete: 16% embodied
energy savings with wood
www.CORRIM.org
Lifecycle Analysis:
the environmental proof of wood*
Source: Athena Institute. http://www.athenasmi.org* Sullivan and Horwitz-Bennett, Using wood for sustainable design&construction
Sustainability Attribute
• Total Energy Use
• Greenhouse Gases
• Air Pollution
• Water Pollution
• Solid Waste
• Ecological Resource Use
Wood
• Lowest
• Lowest
• Lowest
• Lowest
• Lowest
• Lowest
Steel
• + 140%
• +45%
• +42%
• +1900%
• +36%
• +16%
Concrete
• +70%
• +81%
• +67%
• +90%
• +96%
• +97%
Not all engineered products are
created “green”-equal
Green Building Programs-
Who’s in the “LEED”
National Programs
USGBC/L.E.E.D. Leadership in Energy
and Environmental Design
NAHB/Green Building Standard
Green Building Initiative/Green Globes
USGBC/L.E.E.D. for Homes
Mission:
Promote sustainable building
Top 25% of Homeshttp://www.usgbc.org/ShowFile.aspx?DocumentID=3638
Best Environmental Features
Promote Green Residential Builders
Promote Green Commercial Building
USGBC/L.E.E.D.
Categories
InnovationLocation & Linkages
Sustainable Sites
Water Efficiency
Energy & Atmosphere
Material & Resources
Indoor Air Quality
Awareness and
Education
USGBC/L.E.E.D.
Points adjusted for larger/smaller homes
Platinum
Gold
Silver
Certified
USGBC/L.E.E.D.
How to Participate
Join
Identify project team (Charrette)
Build the home
Certify
Sell
Repeat…
NAHB Green Building Program
HBA driven
Online scoring tool
Based on GB Guidelines document
Foundation for HBA programs
Residential ISO Standard -2008
NAHB Green Building Program
Lot Design, Preparation, Development
Resource Efficiency
Energy Efficiency
Water EfficiencyIndoor
Environmental Quality
Operation, Maintenance, Homeowner Education
Global Impact
NAHB Green Building Program
Emerald
Gold
Silver
Bronze
NAHB Green Building Program
Builder ParticipationCalculate your score
Forward to Green Verifier
Build and verify Green Status
Certify Home
Test and Inspect
Build again
Green Building Initiative
MissionAccelerate best building practices
Green Globes (commercial construction)
Integrates use of Athena EcoCalculator
ANSI Standard for assessment of Commercial
Buildings
Promotes NAHB program to HBA’s
National Program Similarities
Checklist based
3rd party verification required
Similar categories addressed:
Resource efficiency
Energy efficiency
Framing recommendation similar:
Advanced Framing and O.V.E.
Designed to create marketing
opportunities
National Program Differences
NAHB program requires environmental
management systems for manufacturer
and builder- ISO 14001
FSC the only forestry certification for
LEED. (USGBC position under review)
NAHB recognizes multiple certifications.
LEED predominantly paper based, NAHB
and Globes are web-based programs.
Regional Green Building Programs
Wisconsin Green Built Home
http://wi-ei.org/greenbuilt/
New construction, remodeling,
multifamily, waterfront programs
Wisconsin Energy Star or REScheck +15
levels
Based on points checklist
Minimum 10% 3rd party verified
Regional Green Building Programs
Minnesota Green Star
http://www.mngreenstar.org/
New construction and remodeling
Certified, Silver, Gold levels
Based on a points checklist
All 3rd party verified
The Big “3” for wood frame:
Summary Categories
Resource Efficiency
Energy Efficiency
Environmental Impact
Finding a Fit for Fiber:
Determining Optimum Value is
A Manufacturer’s Responsibility
Resource Efficiency
The Principle:
Best And Highest Use
Resource Efficiency
Resource Efficient
products used in an
Energy Efficient
Manner
Energy Efficiency
Interplay between the wood frame system
and the thermal envelope
Energy Efficiency
Protect the environment as you conduct
your business
• NAHB Program requirement: “the product
line, plant, or company must be ISO
14001 certified.”
Environment
EWP Applications meeting Green
Building Guidelines- Resource Efficiency
Life Cycle Assessment Tool
Download EcoCalculator at:
http://www.athenasmi.org/index.html
EWP Applications meeting Green
Building Guidelines- Resource Efficiency
Resource EfficiencyUse OVE/Advanced Framing
4’ and 2 Modules
Wider o/c Spacing
More Insulation
Eliminate thermal bridging
Single top plates
2 stud corners with drywall clips
P.E.T.
Construction layouts
EWP Applications meeting Green
Building Guidelines-Resource Efficiency
Resource Efficiency Applications- EWP
Wide Flange I Joists
24 oc performance
Framing layouts
Panelize
P.E.T.
EWP Applications meeting Green
Building Guidelines- Energy Efficiency
Energy Efficiency Requirements: Increase R
Value in the building envelope
Applications:
Remove wood, decrease thermal bridging,
increase insulation…..how?
Use wide flange, heavy duty I joists at 24
oc., 1 ¾” wide face studs for walls.
Stack roof framing over wall framing over
floor framing in a 24” oc module.
Use energy efficient materials when possible.
Advanced Framing Techniques
EWP Applications meeting
Green Building GuidelinesEnvironmental Impact
ISO 14001 Environmental Management
System
Defined: An objectively verifiable
declaration of your intended
environmental management system.
Summary
WOOD
Clearly superior building material
EWP provides optimum performance
opportunities
Not all Engineered Wood is created
GREEN equal.
Learning Objectives
Did we????????
Define and Discuss Sustainability Issues
Compare construction materials for “green”
compatibility
Identify and select various Green Rating Tools
Compare/contrast Green Building Programs
Evaluate various EWP products based on the
deconstruction/reconstruction principle
Discuss EWP framing systems recognized as
“green” by current Green Build programs.
Green Building Practices
For Wood Frame Construction
Engineered Wood, Sustainability
and Green Building Practices
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