The Floating Floor Solution for Soundproofing a Timber Joist Floor.

Floating Floor Solution (15mm Above)

Application: Building Regulations, Change of Use Test & Declare, Remedial and Refurbishment.
Simple slim solution offering a high performance and absolute minimal loss of living space, where there is only access to the floor above and no access to the ceiling below e.g. in apartment dwellings.

Construction: (Timber Joist Floor):
- sacrificial layer or FINISHED surface
- 15mm Phonewell® Sound Insulation
- 18mm chipboard / OSB / floorboards
- Timber Joists
- 100mm x 45kg/m³ mineral wool (ideally fill)
- existing plasterboard or lath and plaster ceiling below.

Materials List (available from our stockists)
- Phonewell® Acoustic Insulation on Floor (1200mm x 800mm x 15mm)
- Phonewell® Eco-Tape
- optional 3mm hardboard, and tacks, to make floor level and sealed
- 18mm chipboard / OSB / existing floorboards
-100mm x 45kg/m³ density mineral wool between joists
- Flexible mastic or Acoustic sealant

Instructions: (have you considered Flanking Noise?)
Joist Cavity
1. Fill the void between the joists with 100mm min. x 45kg/m³ density mineral wool, by accessing the void from above.

Floor
2. Refit the 18mm sub-deck or lay a new floor if appropriate.
3. Examine the timber sub-deck and fill any holes or gaps with flexible mastic or acoustic sealant, tradesmen will often tack down 3mm hardboard sheets to level and seal.  Also seal around the perimeter walls.
4. Ensure the floor surface is clean and even.
5. Begin in one corner and lay the Phonewell® boards on the sub-deck, butted tightly up to the perimeter walls. Do not screw or nail the boards down.
6. Butt each Phonewell® board up tightly to each other, leaving no gaps.  Lay the boards in a brickwork formation. See Cutting Phonewell®.
7. Install the finished floor surface as per Fitting Floor Finishes over Phonewell®.
8. Fit skirting boards ensuring no contact with the floor – leave a 2mm gap.
9. Consider treating any identified flanking walls with Phonewell®.