Fermacell 2FCH21 Timber Party Floor-Ceiling Solution

Fire resistance:

60 minutes.

Acoustic performance:

• Airborne sound resistance (DnT,w + Ctr): 45 dB.

• Impact sound insulation (L’nT,w): 62 dB.

Floor background (minimum):

235 mm x 50 mm solid timber joists at 400 mm centres with 22 mm chipboard overlay.

Acoustic break to ceiling:

MF or resilient bar system set at maximum 400 mm centres at 90° to joist.

Ceiling linings:

Two layers of 10 mm Fermacell.

Fixings:

- Ceiling linings:

30 mm Fermacell screws at 200 mm centres and 40 mm Fermacell screws at 200 mm centres.

- Flooring elements:

22 mm Fermacell flooring screws or 18-19 mm diverging staples at 200 mm centres.

Insulation (minimum density):

100 mm stone mineral wool: 30 kg/m³.

Recycled content:

Best Fermacell gypsum fibreboard contains 100% recycled content. All by-products recyclable.

Other requirements:

Fire stopping around service penetrations. Frame out openings with the same number of layers of board as per above specification. Sockets backed using baffle boxes, intumescent putty pads or suitable rock mineral wool, sufficient to maintain the fire/acoustic performance.

Movement joints are required at maximum 8 linear metre intervals.

Refer to manufacturer's literature. Vapour barrier as required for high humidity areas.

Offset all board joints by minimum 200 mm.