TECHNICAL INSTALLATION GUIDE FOR ATTENU8 BATTENS FOR FFT1 ON E-FT-1, E-FT-2 AND E-FT-3 ROBUST DETAIL
TIMBER FLOORS
- Acoustic isolation tape should be installed around the perimeter of each room which can be held in place by stapling to the plasterboard.
In the event of the building not being boarded at the time of installation a rip liner should be installed which compromises plasterboard of the same thickness as on walls which would be a minimum depth of 10mm more than the finished floor height. The rip liner should finish 5mm above the structural deck and the gap sealed with Acoustic Sealant.
- An Attenu8 Acoustic Batten should be installed around the perimeter of each room 50mm from the wall with Attenu8 Acoustic Battens at no more than 400mm centres perpendicular (at right angles) to the direction of the joists. This spacing relates to living rooms, dining rooms, bedrooms and hall with battens being placed down to 300mm centres for shower rooms, bathrooms and kitchens.
Shower Rooms and Bathrooms
A full platform of Battens should be installed under the location of WC pans to give support for the additional loading.
Kitchens
A Batten should be positioned under the leading edge of all base units to give additional support.
Doorways
Create a ladder of Battens using off cuts between the Perimeter Batten of adjacent rooms to give under joists situated in doorways.
Note: There should be no mechanical fixing of the Batten to the structural deck.
A 25mm thick Acoustic Insulation Mat with a density of 10-36 kg/m3 is laid between the Attenu8 Battens ensuring that all joints are tight butted and that care is taken to ensure that the insulation is laid between the Perimeter Batten and the wall.
A layer of 19mm plasterboard plank is laid at 900 over the Battens, adhesive should be applied to the tops of the battens. Ensure that the expansion gap at the perimeter is maintained. Bond the chipboard to the plasterboard plank with dabs of acoustic sealant at 300mm centres. This procedure ensures that the chipboard and plasterboard plank do not cause a slapping effect. It is important that the plasterboard stagger does not coincide with the chipboard stagger in the same row. Edges on the short sides of the board must join on a batten. All joints of the chipboard should be tight butted and glued with good quality PVA adhesive. The boards are then screwed down using countersunk wood screws as in the screw fixing pattern. Perimeter fixings on the long edge of the board should not exceed 600mm. Fixing centres along the battens should be at 300mm and 150mm from the long edge perimeter. Where boards join on the short edges they should be screwed down in two places both sides of the join.
The plank and chipboard butt up to the acoustic isolation tape around the perimeter of each room with the excess flanking strip turned over the top face of the chipboard and lightly stapled into place. The acoustic isolation tape should isolate all hard surfaces and prevent contact between the plank and chipboard against the wall and equally between the skirting and the chipboard. Any excess acoustic isolation tape can be trimmed off flush with the front face off the skirting. Acoustic sealant should now be applied along the join.
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