① 18mm Chipboard min 11.9 kg/m³
② 200mm Timber Joists
③ 100mm RW45 Slab Insulation min 45 kg/m3
④ Min 50mm Air Cavity
⑤ New Independent Timber Ceiling (*Check joist depth to room span with structural engineer)
⑥ 2 x 15mm Soundboard min 12.6 kg/m2
Detailed Drawing
If treated and installed correctly you can easily pass a sound test with no issue, as soon as ONE of the factors below is not considered it significantly reduces your chances of a pass.
1. Ensure all specified materials and dimensions are in accordance with the drawing.
2. Fill all voids between walls and floors.
3. Install flanking strips around the perimeter of the flooring treatment to isolate floor from walls and skirtings.
4. Install slab insulation tightly fitted between the joists, with no gaps and ensure the air cavity is not bridged at any point.
5. Ensure min. 25mm Air Cavity between the floor joists and the independent ceiling.
6. Fix boards to independent ceiling with long edges at right angles to the framing.
7. Affix the second acoustic plasterboard with staggered joints. Ensure a 3mm gap is maintained around the perimeter and seal with acoustic sealant.
8. Ensure ALL flanking routes are supressed.
