Under Floor soundproofing method 1
Features
Pros
- no increase in floor height
- no access to ceiling below
- lowest cost system available
- part E compliant
- floor boards must be lifted for installation
Cons
- requires lifting of floorboards
Acoustic mineral wool and SBM5
23db airborne 9db impact cost: Medium
This system incorporates AMW100, and high density acoustic plasterboard below the floor boards and a layer of SBM5. Typically the incorporation of the membrane hanging between the joists can uplift the airborne soundproofing by 6-8 db in addition to the other materials. Gaps must be sealed between the floor boards using acoustic mastic. Or the floor boards replaced with quietboard. The floor will now have five layers of protection. Ceiling, Acoustic mineral wool, 12.5m Acoustic plasterboard, SBM5, and sealed floor boards.
required materials
- Resilient Tape (on)
- 25 x 50mm Timber Battens (at 400mm centres on)
- 3.5mm Neoprene Pads (on)
- 52mm Acoustic Quilt (between battens)
- 18mm APB
- 52mm AMW (beneath joists)
Installation:
- the room must be cleared as floor boards must be lifted.
- cut battens and nail or screw to joists 50mm from top.
- unpack AMW100 and cut 10mm wider than joist spacing, pack AMW100 down between joists.
- APB and cut to same width as joist space.
- run a thick bead of acoustic sealant along the battens making sure there are not gaps without sealant, and that extra sealant is used where battens join.
- lay the APB into the gap between joists with a little pressure to make sure the sealant bonds to APB and batten.
- Lay SBM5 over the entire floor area, unrolling the mat along the length of the joists using whole lengths. join the SBM5 between joists with 100mm overlap bonding with acoustic glue.
- re lay the floor boards or use quiet board for better soundproofing, making sure to run a bead of sealant along all joints between boards.
- screw down floor boards to make sure there are no movement, creaks or noises from boards.