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Installation guide

ROCKFON System Mono® Acoustic

ContentsIntroductionSystem overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Job site conditions during installation . . . . . . . . . . . . . . . 3

ROCKFON System Mono® Acoustic componentsGrid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4ROCKFON System Mono Acoustic panels . . . . . . . . . . . . 5Fastening washers and screws . . . . . . . . . . . . . . . . . . . . . . 5Mono intersection bracket . . . . . . . . . . . . . . . . . . . . . . . . . . 5Tape and Mono Filler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5ROCKFON System Mono Ready-Mix . . . . . . . . . . . . . . . . . 5ROCKFON System Mono Acoustic inspection hatches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6ROCKFON System Mono Acoustic Flecto . . . . . . . . . . . . 6

System installationGrid installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Chicago Metallic Monolithic (1200x600) . . . . . . . . . . . . . 8 Chicago Metallic Monolithic (1200x900) . . . . . . . . . . . . . 9 Assembly of panels (1200x1200) . . . . . . . . . . . . . . . . . . .10Assembly of panels (1800x1200) . . . . . . . . . . . . . . . . . . .11Assembly of panels (1800x1200) . . . . . . . . . . . . . . . . . . .12Assembly of panels (900x1200) . . . . . . . . . . . . . . . . . . . .13Tape and filler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Joint check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Sanding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Perimeter finish and site masking . . . . . . . . . . . . . . . . . . 17Render . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-19Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

2 3

ROCKFON System Mono® Acoustic – Installation Guide

System overviewDescriptionMono Acoustic is an aesthetically pleasing seamless ceiling offering excellent sound absorption properties (up to αw = 1,00, Class A) . ROCKFON offers three different ROCKFON System Mono Acoustic ceiling panels for different installation purposes;• ROCKFON System Mono Acoustic• ROCKFON System Mono Acoustic Direct • ROCKFON System Mono Acoustic Flecto

ROCKFON System Mono Acoustic is meant for installation on a grid (suspended mounting) and has an αw = 0,90 . ROCKFON System Mono Acoustic Direct is meant only for installation directly underneath an existing ceiling or against the soffit and has an αw = 1,00 . ROCKFON System Mono Acoustic Flecto is developed for vaulted installation of Mono and has an αw = 0,90 (similar to our standard ROCKFON System Mono Acoustic panels) .

Once installed, all the components form a seamless ceiling, requiring neither paint nor any additional structural elements .

With the exception of the fastening screws, all products are made specifically for the Mono Acoustic system . Installers must use only the items described herein .

The installation must be completed in accordance with the Mono Acoustic system installation guide . To conserve fire- and acoustical properties of the ROCKFON System Mono Acoustic ceiling, ROCKFON recommends that the installation is done by a certified Mono installer .

Installation order1 . Installing the Chicago Metallic Monolithic grid system2 . Installing Mono Acoustic panels3 . Filling the joints with ROCKFON System Mono Acoustic Tape and Mono Filler4 . Sanding of joints5 . Protective masking of the room: walls, floors as well as furniture6 . Spraying the Mono Ready-Mix render

Technical dataSuspension depth

Module size Module thickness Minimum suspension depth

900x12001200x12001800x1200

40mm 40mm with direct installation90mm with 50mm plenum

System weight per m2

Panel Direct installationInstallation on a grid system

(200mm plenum)

6,0 kg 7,5 kg 8,5 kg

System load-bearing capacity

Maximum evenly-distributed load capacity Maximum point load capacity

2,0 kg/m2 1,5 kgWhen the system is installed to bear load, ROCKFON recommends to fix the panel with two screws in the middle instead of one (<1,5 kg point load) or with twoscrews + profile reinforcement (>1,5 kg point load or >2 kg/m2 evenly distributed load) .

Job site conditions during installationTemperature and humidityA Mono Acoustic ceiling must be installed in a closed and covered location . The air temperature in the location must be at least 15°C and the relative humidity must be between 40% and 60% . Non-compliance with these conditions significantly prolongs drying time . HandlingFor an optimised work environment, we recommend installers always observe common work practices and follow the installation advise as shown on our packaging .

PlanningMono Acoustic is a finished ceiling . No paint or other treatment should be added after spraying the Mono Ready-Mix . It is important to avoid producing dust during and after the installation of the ceiling . The monolithic nature of the ceiling means it is non-demountable, so careful sequencing of the construction work is essential along with the installation of hatches if access is required .

Incident lightIt is recommended to avoid incident/side light on suspended ceilings . Extreme floodlight might cause visible joints .

Recommendations+ The use of a fan convector unit,

ventilator and dehumidifier is recommended if the natural conditions of the site do not allow suitable temperatures and humidity levels . The use of these devices allows the drying time to be significantly reduced .

– However, ROCKFON advises against using a hot air blower that is too powerful, produces excessive heat or that could result in too fast drying, as this may cause cracking . This type of device may only be used within a safe distance from the Mono Acoustic ceiling as the goal is to heat the air rather than the ceiling directly .

Attention! In swimming pools ROCKFON

advises to install the system in the following way; The grid and suspension system used should be corrosion resistant . The ventilation in the swimming pool and the plenum should be optimal to avoid condensation issues . ROCKFON recommends to install the ROCKFON System Mono Acoustic not completely against the wall but to leave an opening so that the air can circulate in the room/plenum . ROCKFON recommends to create a similar climate (temperature and humidity) in the room and plenum . The ceiling should be at a certain height in order to overcome water splashing against the ceiling (this might lead to spots on the ROCKFON System Mono Acoustic surface) . For usage of ROCKFON System Mono Acoustic in a swimming pool, please contact your local ROCKFON technical support for more information .

3

Introduction

Prohibited– Regardless of the type of grid

chosen, ROCKFON prohibits the use of any wire, quick hanger or other hanger that does not guarantee against up-lift .

Recommendations+ To avoid uplift, ROCKFON

recommends the use of rigid hangers .

+ A perimeter trim installed around the room will enhance the stability and rigidity of the ceiling .

+ To fix the omega-shaped cross tee in the perimeter trim ROCKFON recommends the use of the following clip ref . no . AX087X500P .

The grid system ROCKFON recommends is the Chicago Metallic Monolithic grid . Additional alternative grid systems may be appropriate . Consult with ROCKFON to discuss suitability .

This grid system has a T-shaped main runner and an omega-shaped cross tee, typically known as “furring channel”, with a 35mm wide table . The main runner is available with a slot distance of 200mm and 225mm .

Grid

Chicago Metallic Monolithic grid

4 5

ROCKFON System Mono® Acoustic components

Question? Are colour finishes available?

Yes!1 . Send ROCKFON your

required colour reference (NCS code or RAL code) .

2 . ROCKFON produces and sends colour samples .

3 . After validation, ROCKFON produces the colour render with a minimum quantity of 20 kg .

Prohibited– With the exception of the

standard 55mm long screws, all other accessories are spe-cially developed to guarantee a perfect aesthetic and acoustic result with the Mono Acoustic panel . ROCKFON prohibits the use of accessories other than those sold for that purpose .

Attention! The joint filler and render must

be stored at a temperature above 0°C . If kept in their original unopened packaging, they have a shelf life of 18 months . ROCKFON ROCKFON System Mono Acoustic Flecto panels should be handled with extra care . Due to the grooves in the backside the tiles are more difficult to handle than standard ROCKFON System Mono Acoustic panels .

ROCKFON System Mono Acoustic panels ROCKFON System Mono Acoustic panels are made from high-density stone wool . They are finished with a white fleece on the visible side and an anti-ageing, high performance membrane on the reverse . ROCKFON System Mono Acoustic panels have tapered edges on all four sides which allows for optimum jointing .

ROCKFON System Mono Acoustic Direct panels are made from high-density stone wool and are also finished with a white fleece on the visible side . The reverse is not provided with an anti-ageing, high performance membrane since the panel is mounted directly to the soffit . This panel may under no circumstances be used for suspended solutions!

ROCKFON System Mono Acoustic Flecto panels are made of high-density stone wool . They are finished with a white fleece on the visible side and an anti-ageing, high performance membrane on the reverse . The panel has tapered edges on all four sides for optimal jointing and the backside has grooves to allow for vaulted installation .

Fastening washers and screws Combined with standard screws (55mm) positioned every 300mm, ROCKFON System Mono Acoustic Washers allow for the installation of panels to the Chicago Metallic Monolithic grid on the perimeter and in the middle of the tiles . The fastening washers increase the bearing surface of the screw head . Their specially designed bowl shape allows the screw heads to be recessed into the panel .

Mono intersection bracket The Mono intersection bracket allows for the installation of panels to the Chicago Metallic Monolithic grid at the intersection of ROCKFON System Mono Acoustic panels . It is designed in such a way that it can be pushed into the panel (four small teeth), providing that the installer has its hands free to fix the bracket .

Tape and Mono Filler The 40mm wide tape and ready-mixed Mono Filler are specially designed to ensure strong, optimal joints between the ROCKFON System Mono Acoustic panels . Each tape roll is 150m, and the filler is packaged in a 20 kg tub .

ROCKFON System Mono Ready-Mix (white or colour) Manufactured in white as standard, Mono Ready-Mix (render) can also be supplied in colours upon request . In this case, a colour reference (e .g . NCS code, RAL code) should be sent to ROCKFON and a sample of the requested colour will be created . The manufacturing time for a colour sample is around 10 working days . The colour finish render is subject to a minimum quantity of 20 kg . The render is packaged in 20 kg tubs .

System components and brute consumption guide per m²

* In critical light conditions or depending on the co lours, higher consumption may be required.** For colour render it is recommend to prime the joints with mono primer.Please note that the quantity of accessories, tape and Mono Filler required depends on the panel module size.

Mono Acoustic panels in module

1800x1200mmRound washer (250 pcs/box)

Mono intersection

bracket (150 pcs/box)

Mono Acoustic Tape R40//150

Fast-drying ready-mix Mono Filler (20 kg/tub)

Mono Ready-Mix - low pressure application

(20 kg/tub)

Mono Ready-Mix - high pressure

application (20 kg/tub)

0,46 0,46 pcs (excl . perimeter

fixation)

4,17 pcs 1,4 lm 1,00 - 1,20 kg White 1,0-1,2 kg *Colour 1,2-1,4 kg *

White 1,2-1,4 kg *Colour 1,3-1,5 kg *

5


To provide access towards the plenum ROCK-FON has developed three standard inspection hatches .

Two sizes of square hatches made out of an aluminum frame with an integrated ROCKFON System Mono Acoustic panel, which can be sprayed with ROCKFON System Mono Ready-Mix render to create a similar surface as the rest of the seamless ceiling .

And one round white pre-coated metal hatch which can be installed either over sprayed with ROCKFON System Mono Ready-Mix render or used in its original state without over spraying .

Dimensions square hatches:400x400mm600x600mm

Dimension round hatch:Ø700mm

Consult with your local technical support in order to get more information about our ROCK-FON System Mono Acoustic inspection hatches .

Details of the ROCKFON System Mono Acoustic inspection hatches can be found in the ROCK-FON System Mono Acoustic solution library .

ROCKFON System Mono Acoustic Flecto ceiling panels allow for installation to concave or convex surfaces with a radius of 1500mm minimum .

A ROCKFON System Mono Acoustic Flecto ceiling should be fitted to a curved solid structure .The “shell” serves as a support for the fastening screws and the ROCKFON System Mono Acoustic Flecto panels .

ROCKFON does not recommend using timber panels for supporting structures or shells .

Examples and details of the ROCKFON System Mono Acoustic Flecto can be found in the ROCKFON System Mono Acoustic solution library .

ROCKFON System Mono Acoustic inspection hatches

ROCKFON System Mono Acoustic Flecto

This hatch requires a void space of 10cm . For opening, lift the total hatch 5cm and slide it (above the grid) a few centimeters to the side, then rotate the opposite side of the hatch downwards .

This hatch requires no void space . For opening, lift the total hatch 1cm and rotate .

6 7


Grid installationTools required • Metre rule • Utility knife • Pencil • Laser level • Drill • Power screwdriver • Worksite light • Scaffolding • Scissors

Installation guidelineThe installer must consider the dimensions of the room, the presence of service elements to be integrated (lights, air-conditioning, etc .) and arrange the ceiling so there are no whole panels against the walls .

Regardless of the grid system, the installer should always install a perimeter trim . This component should be fastened to all vertical junctions with the ceiling such as walls, partitions, columns, upstands, etc . A perimeter trim installed around the room enhances the stability and rigidity of the ceiling .

Regardless of the grid system, the installer should always suspend the grid using rigid hangers (threaded rods, nonius hangers, fixed brackets, metal fixing clips, metal angle, etc .) for stability and rigidity . ROCKFON prohibits the use of any wire or other hanger that does not provide stability and rigidity .

All fitting elements involving a space reservation in the ceiling, such as ventilation grating, lighting apparatus or an access hatch, need a crosshead . To install the crosshead, the installer should choose the profile most appropriate to the situation: Omega-shaped cross tee,T35 main runner or the C-shaped wall angle .

Recommendations+ For grid installation, ROCKFON

recommends the use of suitable scaffolding and additional lighting apparatus under all circumstances .

+ ROCKFON also recommends the use of a laser level to guarantee optimum results .

Caution!! The ROCKFON System Mono

Acoustic system can maximally bear the direct load of service elements (HVAC, Lighting, etc .) as described on page 3 of this installation guide .

7

System installation

G

AF

A

B

C

ED

D

D

Chicago Metallic Monolithic system in 1200x600mm.Tile dimensions 1800x1200mm and 1200x1200mm.

• T35 main runners with slot distance 200mm main runners positioned at 1200mm centres

• Omega cross tees installed every 600mm between main runners

• Perimeter trims fixed to the vertical surfaces (walls, columns, etc .) every 400mm

• Hangers installed every 1200mm along the main runners

Recommendations+ During and after grid installation, it

is recommended that the flatness and the level of the grid be checked . In a 1200x600mm installation, it is recommended that the angles between the main runners and cross tees also be checked for squareness . This can be easily done by comparing the measurements of the two diagonals .

Check! The maximum surface flatness

tolerance is 2mm over one metre and 5mm over five metres . This tolerance is valid for all directions .

Caution! When used for large dimension

ceilings, ROCKFON System Mono Acoustic ceilings must be installed with a movement joint . The maximum surface area between these joints is limited to 300m2, and the largest dimension must not exceed 25m1 . Movement joints in a ROCKFON System Mono Acoustic ceiling must coincide with the Movement joints in the building .

Distance overview (mm)

A Hanger distance 1200

B Main runner distance 1200

C Max . distance to the first main runner 400

D Distance between cross tees 600

E Max . distance to the first cross tee 400

F Max . distance to the first hanger 400

G Distance between fixing points perimeter trim 400

8 9

System installation

Entretoise T 40

Coulisse de rive

Porteur T 40

Support plafond

Suspente rigideHangersPerimeter trimCross tee

Main runner

Concrete soffit

G

AF

A

B

C

ED

D

D

Chicago Metallic Monolithic system in 1200x900mm.Tile dimensions 1800x1200mm and 1200x900mm.

• T35 main runners with slot distance 200mm main runners positioned at 1200mm centres

• Omega cross tees installed every 900mm between main runners

• Perimeter trims fixed to the vertical surfaces (walls, columns, etc .) every 400mm

• Hangers installed every 1200mm along the main runners

Recommendations+ During and after grid installation, it

is recommended that the flatness and the level of the grid be checked . In a 1200x900mm installation, it is recommended that the angles between the main runners and cross tees also be checked for squareness . This can be easily done by comparing the measurements of the two diagonals .

Check! The maximum surface flatness

tolerance is 2mm over one metre and 5mm over five metres . This tolerance is valid for all directions .

Caution! When used for large dimension

ceilings, ROCKFON System Mono Acoustic ceilings must be installed with a movement joint . The maximum surface area between these joints is limited to 300m2, and the largest dimension must not exceed 25m1 . Movement joints in a ROCKFON System Mono Acoustic ceiling must coincide with the Movement joints in the building .

Distance overview (mm)

A Hanger distance 1200

B Main runner distance 1200

C Max . distance to the first main runner 400

D Distance between cross tees 900

E Max . distance to the first cross tee 400

F Max . distance to the first hanger 400

G Distance between fixing points perimeter trim 400

9

System installation

Entretoise T 40

Coulisse de rive

Porteur T 40

Support plafond

Suspente rigideHangersPerimeter trimCross tee

Main runner

Concrete soffit

Assembly of panels 1200x1200mmInstallation Guide

• Each Mono Acoustic panel is fastened with a plasterboard screw (length 55mm) combined with a Mono Acoustic washer or a ROCKFON System Mono Acoustic intersection bracket .

• The round washers are used for fixation of the panels at the centre and at the perimeter trim . The spacing between the round washers is 300mm .

• The Mono intersection brackets are fastened on the intersection of panels . The spacing between the Mono intersection brackets is 300mm (along the main runner) and 400mm (along the cross tees) as shown in the drawing below .

• Minimum one round washer connection should be placed at the centre of each panel . If the system is bearing load, according to the maximum capacities as displayed on page 3 of this guide, ROCKFON recommends to place two round washers at the centre of the panel (400mm distance between the washers) .

Cutting and fastening at perimeters• The edge cuts must be no more than 2mm shorter than the actual dimension in order to

guarantee optimum perimeter finish .• The fastening of panels is done with the round washers with a maximum spacing as described

above .

Check! During and after installation of the

panels, it is recommended that the surface level and flatness of the ceiling be checked . The maximum tolerance is 2mm over one metre and 5mm over five metres . This tolerance is valid for all directions .

Caution!! If an edge cut is too long, the

installer will have to force the panel in, which can result in damage to the fleece . Conversely, if an edge cut is too short it can leave a gap that is too large to guarantee an optimum and quick finish during installation of the acrylic filler .

!! When installing the fasteners, it is recommended that they be controlled . If they are screwed in too deep, the panels will deform resulting in surface flatness problems and excess use of filler and reduction in sound absorption properties .

Recommendations+ ROCKFON recommends a staggered

installation of the panels .

+ An aligned installation of the panels is possible .

300

600 600

1200 x 1200

1200 x 1200

1200 x 1200

300 300 300

300

300

300

400 400 400

300

custom

xcustom

custom

x1200

custom x 1200

custom x 1200

: Washer: Mono Intersection Bracket

10 11

System installation





• Two round washers should be placed at the centre of each panel . If the system is bearing load, according to the maximum capacities as displayed on page 3 of this guide, ROCKFON recommends to place extra round washers at the centre of the panel (400mm distance between the washers) .

Cutting and fastening at perimeters• The edge cuts must be no more than 2mm shorter than the actual dimension in order to

guarantee optimum perimeter finish .• The fastening of panels is done with the round washers with a maximum spacing as described

above .









300

600 600 400 400 400

1200 x 18001200 x 1800

300 300 300

300

300

300

300

custom

xcustom

custom

x1800

custom x 1200

custom x 1200


11

System installation





• Minimum one round washer connection should be placed at the centre of each panel . If the system is bearing load, according to the maximum capacities as displayed on page 3 of this guide, ROCKFON recommends to place two round washers at the centre of the panel (400mm distance between the washers) .

Cutting and fastening at perimeters• The edge cuts must be no more than 2mm shorter than the actual dimension in order

to guarantee optimum perimeter finish .• The fastening of panels is done with the round washers with a maximum spacing as

described above .









300

600 600

1200 x 1800 1200 x 1800

300 300 300

300

300

300400 400 400

300

custom

xcustom

custom

x1800

custom x 1200

custom x 1200


12 13

System installation





• Minimum one round washer connection should be placed at the centre of each panel . If the system is bearing load, according to the maximum capacities as displayed on page 3 of this guide, ROCKFON recommends to place extra round washers at the centre of the panel (400mm distance between the washers) .

Cutting and fastening at perimeters• The edge cuts must be no more than 2mm shorter than the actual dimension in order

to guarantee optimum perimeter finish .• The fastening of panels is done with the round washers with a maximum spacing as

described above .









300

600 600

900 x 1200

900 x 1200

900 x 1200

300 300 300

225

225

225

225

400 400 400

custom

xcustom

custom

x900

custom x 1200

custom x 1200


13

System installation

Tape and fillerTools required • Soft finishing knife (150mm) • Mixer • Rotating blades for mixing filler • Soft finishing knife (240mm) • Ventilator • Dehumidifier (optional) • Scaffolding • Site light • Fan convector unit (optional)

Affixing the tape and applying the first coat of filler

1. Lay the filler on the joints 2. While the filler is still wet, position the tape on the joints

3. Load the thinned edge with filler 4. Once the first coat dries*, apply a second coat of filler to all joints and fasteners to guarantee good overall evenness

ConsumptionThe filler will cover approximately 1,0 kg/m² . The maximum width of the filler is 200mm .Attention: this usage amount is theoretical . It is calculated for a flat ceiling and does not take into account the specific layout of the worksite .

The presence of downstands, light troughs, floating edges (island zone) or an unusual room shape may result in additional consumption . For example, the treatment of a plasterboard bulkhead connected to a Mono Acoustic ceiling using reinforced tape leads to additional consumption of the joint finish by approximately 1,0 kg per linear metre of level change .

*Drying timeThe drying time depends on the conditions of the site .For the first coat, the general drying time is between 10 and 16 hours .For the second coat, the general drying time is between 6 and 10 hours .

Recommendations+ For the finishing phase, ROCKFON

recommends the use of suitable scaffolding and additional lighting apparatus in all circumstances . A scaffolding platform adjusted to the correct height and appropriate lighting will be more comfortable for the installer and result in faster, quality installation of the joints .

+ ROCKFON recommends mixing the Mono Filler before use . This ensures homogenity and achieves a better slide off the finishing knife .

Caution!! Tape that is not properly stuck

or pressed into the joint can result in serious joint quality defects .

Attention! The second coat of filler can only

be done when the first coat is completely dry . Non-compliance with this will result in serious defects in the quality of the joint .

Check! Keep the specific design/layout

of the project in mind when calculating the amount to be used .

! During this phase, it is recommended that the amount of filler applied is carefully checked to guarantee evenness of the joint after drying .

14 15

System installation

Attention! A clean 350mm finishing knife and

a high-power lamp are required in order to adequately check the quality of the joints .

Check! In order to check the quality of a

joint, a knife must be used to show surface level and flatness defects or bumps . Follow the checking instructions shown opposite .

Question? Is it possible to correct a joint defect if

the ceiling is finished?

YES! It is always possible to correct it but the work is more difficult . It is much easier to correct a joint before spraying the finishing coat .

1. Light up the area to check: Position a high-power lamp in front of the ceiling area to be checked .

2. Position the finishing knife: It must be a perfectly clean 350mm knife, and should be placed vertically under the sanded joints .

- Negative result: The presence of a beam of light will indicate a lack of quality on the joint . This will need to be rectified in order to attain the quality expected of a Mono Acoustic joint .

- Positive result: The absence of a beam of light indicates perfect evenness of the joint . It is ready to be sanded .

Joint check

15

System installation

SandingTools required • Protective mask • Sanding block (120x70mm) • Safety goggles • Scaffolding • Sanding handle (230x110mm) • Sandpaper (80 and 100 grain) • Site light • Long-neck sander with rigid flat surface • Connected vacuuming system

Sanding techniquesTo guarantee quality sanding, the installer must use the long-neck sander for large surfaces .The sanding block and handle are reserved for perimeter sanding work and for small retouches .The chosen sandpaper must have 80 or 100 grade grit .

Repeat joint checkA final joint check is highly recommended before applying the final render . Although it is always possible to correct unevenness, the work is more difficult once render has been applied . It is much easier to correct a joint before spraying the finishing coat .

Attention! ROCKFON recommends the use of a

long-reach sander equipped with a rigid sanding platform (ref . no . 495 168) such as FESTOOL PLANEX LHS 225 EQ-PLUS or equivalent .

!

Recommendations+ For the sanding phase, ROCKFON

recommends the use of suitable scaffolding and additional lighting apparatus in all circumstances . A scaffolding platform adjusted to the correct height and appropriate lighting will be more comfortable for the installer and facilitate faster, better quality sanding .

+ It is strongly recommended to connect the long-reach sander to a dedicated vacuum system to provide maximum cleanliness and offer maximum protection .

16 17

System installation

Perimeter finish and site maskingTools required • Adhesive masking tape • Protection film e .g . polyethylene • Site light • Sealant pump gun • Acrylic sealant cartridge • Scaffolding

Vertical protection installation

Caution!! The placement of the adhesive

masking tape determines the quality of the edge finish during the spray phase . If it is set too low, the installer risks spraying the wall . If it is set too high, the ceiling will not be completely protected .

Recommendations+ The necessity of masking will

depend on the site progress . The need to protect the floor, furniture or walls will vary for each situation . This chapter only covers the installation of vertical protections against walls .

Prohibited– Never use silicone joints .

These particular joints cannot be painted and prevent a perfect finish during the spray phases . Use acrylic sealant . Further information and details can be found in the ROCKFON System Mono Acoustic solution library .

17

System installation

RenderTools required • Protective mask • Safety goggles • Mixer • Rotating blade for mixing the render • Spray machine for low pressure application (type Euromair MPE 80 or equivalent) or spray machine

for high pressure application (type Euromair CP10 or equivalent)

ConsumptionThe nett consumption is 1,2 kg/m² . To realize this consumption with low pressure application the brute amount of render applied is 1,2 kg/m² for the ROCKFON System Mono Ready-Mix white and 1,2 - 1,4 kg/m² for the ROCKFON System Mono Ready-Mix in colour . To realize this consumption with high pressure application (max . 3,5 bar) the brute amount of render applied is 1,2 - 1,4 kg/m² for the ROCKFON System Mono Ready-Mix white and 1,3 - 1,5 kg/m² for the ROCKFON System Mono Ready-Mix in colour .

It is possible to apply the Mono Ready-Mix on surfaces other than the Mono Acoustic itself, such as plasterboard and concrete beams . However, once treated, these surfaces will not offer any acoustic benefit, but will provide the same finish as the Mono Acoustic to give a homogenous appearance .

Stirring and mixing of ROCKFON System Mono Ready-Mix• Stir up the ROCKFON System Mono Ready-Mix in the tub

• Empty the contents of the bucket into the mixing tank

Attention! Even if the Mono Ready-Mix has

a pasty texture in the packaging, it is not necessarily ready to use . Whether white or in colour, it must be mixed in accordance with the directions outlined in this chapter .

Check! The only method of checking the

render consumption is to count the boxes used as spraying progresses . This simple and efficient operation can become complex on large surfaces, hence dividing into sections is recommended . For example, by dividing a 180 m² ceiling into three 60 m² sections, the theoretical consumption indicates a spray of 78 kg per section, or approximately 4 buckets . As the spray is done in three coats, it is recommended that a little more than one box be sprayed per coat and per 60 m² section .

Check! Take into account the specific

layout/design of the project and the depth of the tank/pipe for the calculation . Depending on the machine type, the tank/pipe bottom corresponds to a certain loss of render finish associated with the initial filling . Treating a 500mm plasterboard downstand with the Mono Acoustic finish coat along a 30 m facade results in additional consumption of 20 kg, or one box of render .

18 19

System installation

Recommendations+ ROCKFON recommends the

use of a spray machine such as EUROMAIR MPE 80 or CP but it is also possible to use equivalent machines . Airless spray equipment is not allowed . Please contact your local technical support for more info on the specifications of the machinery .

+ During the spray phases, the nozzle must be between 0,80 m from the surface to be sprayed . A scaffolding platform adjusted to the correct height and appropriate lighting will be more comfortable for the installer and facilitate a faster, quality spray finish .

+ If the surface to be sprayed is large, it is recommended that it be divided into sections in order to control the render consumption . The presence of columns, windows or beams can help with this division .

RenderSpraying

• The nozzle must be 0,80 m from the ceiling .

• Treat the peripheries by following a slow and linear motion along the perimeter of the room .

• By regular rotations of the nozzle, apply a first coat of approximately 0,4 kg/m² onto the ceiling .

• Progress in areas of about 0,6 m, depending on the diameter of rotation . The layers should cover each other to provide good coverage .

• The drying time is approximately four hours per coat .

• After the first spray coat has completely dried, repeat this procedure and apply a second coat of 0,4 kg/m² .

• After the second spray coat has completely dried, repeat this procedure and apply a final coat of 0,4 kg/m² .

Recommendations+ It is recommended to wait for the

final coat to dry completely to have a final rendering of the finished ceiling . The drying time depends on the conditions of the site . To learn what ROCKFON recommends, see page 3 .

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System installation

ServicingROCKFON System Mono Acoustic ceilings require only minor maintenance, and the amount will depend on the use of the room in which it is installed .Mono Acoustic ceilings should only be installed by authorised system installers . (Please contact ROCKFON for contact details of your nearest authorised installer or visit us at www.rockfon.com) . Any small repairs and surface processing must be carried out exclusively by authorised installers .

It is possible to apply the ROCKFON System Mono Ready-Mix on surfaces other than the Mono Acoustic panels, such as plasterboard and concrete beams . However, once treated, these surfaces will not offer any acoustic benefit, but will provide the same finish as the Mono Acoustic to give a homogenous appearance .

OverviewCleaning Vacuum cleaner with soft brush at low power .

Surface discolouration Apply a thin layer of render using the Mono trowel .

Minor cracks and scratches Apply a small amount of ROCKFON System Mono Ready-Mix using a paintbrush or paint gun .

Cracks and indentations Seal by using ROCKFON System Mono Acoustic Filler, then apply a small amount of ROCKFON System Mono Ready-Mix .

Larger cracks and damage Fill the gap with a “plug” made of ROCKFON System Mono Acoustic panel, then cover the repaired spot with ROCKFON System Mono Ready-Mix .

MaintenanceCleaningThe Mono Acoustic ceiling is anti-static so it does not retain dust and can easily be kept clean . To clean the panels, use a vacuum cleaner with a soft brush operating at low power . Mono Acoustic ceilings must not be cleaned with water or wiped with a wet cloth, etc .

RenovatingMono Acoustic ceilings can be renewed/refreshed by applying a new layer of ROCKFON System Mono Ready-Mix . For this, ROCKFON advises you to call the company that performed the initial works or a qualified Mono Acoustic installer . The sound absorption ratio decreases by approximately 10% with each additional layer of Mono Ready- Mix .

Surface discolourationIn the case of surface discolouration, apply one or more new, thin layers of ROCKFON System Mono Ready-Mix . If the discoloured spots are due to water action (or because of deposition or tobacco smoke) the surface should be thoroughly dried and sealed prior to commencement of repairs . Approximately 0,3 kg render per m2 should be applied by using dedicated Mono Acoustic equipment . In order to preserve the ceiling’s acoustic properties, the recommended amount of render should not be exceeded . The sound absorption ratio decreases by approximately 10% for each additional layer of ROCKFON System Mono Ready-Mix .

Prohibited– Do not use any paints or similar

products that provide a total covering over the surface, since such products will reduce the ceiling’s acoustic properties .

20 21

System maintenance

RepairsAny damage to a Mono Acoustic ceiling can always be repaired . However, the base materials that the ceiling is made of must be used . For tile reparations during the ROCKFON System Mono Acoustic installation, please refer to your local technical support for more information .

For damages that occur after the ceiling is installed, ROCKFON recommends calling upon the company that installed the original ceiling or a qualified ROCKFON System Mono Acoustic installer .

Superficial damage - Minor cracks and scratchesSuperficial damage (screw holes, light impact) or minor cracks and scratches can be easily repaired using a small quantity of ROCKFON System Mono Ready-Mix applied with a paintbrush on the damaged parts . Alternatively, a thin layer of the render may be applied using a Mono Acoustic paint gun .

Structural damage - Larger cracks and damageIn the case of larger cracks, significant or structural damage (water damage, heavy impact) follow the procedure for replacement of entire panel fragments . In this case, the repair method is as follows:

1 . Remove the damaged panel fragment by cutting it out with a knife at an angle of 60° .2 . Cut a matching “plug” out of a new Mono Acoustic panel and fasten the “plug” in the hole using

the Mono Filler .3 . Sand the surface around the hole in order to remove the excess render .4 . Apply a new layer of the filler on the seam between the “plug” and the Mono Acoustic panel,

following the instructions set out in the system installation guide .5 . Apply the ROCKFON System Mono Ready-Mix, following the instructions set out in the system

installation guide . The render layer will become “toned” which will minimise the contrast between the elements . Alternatively, apply the render over the entire ceiling surface .

1. Removing damaged panels and sanding surrounding area 2. Installing new panels and filling edges

3. Sanding of dry joints and spraying of the area 4. Spraying and removal of masking protections of walls, floor etc.

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System maintenance

ROCKFON(ROCKWOOL Finland)Pakkalankuja 6, PL78 FI-01511 Vantaa Finland

Puh. (+358) 09 8563 5880Faksi (+358) 09 8563 5889

[email protected]

We believe our acoustic stone wool and metal solutions for ceilings and walls are a fast and simple way to create beautiful, comfortable and safe spaces.

Easy to install and durable, they protect people from noise and the spread of fire. They are our way of making a constructive contribution towards a sustainable future.

Create and Protect is what drives us. It means putting people first, sharing success and maintaining trust.

It’s our rock-solid promise to you. At ROCKFON, Create and Protect is what we do - and it’s inspired by you.

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