A multi-purpose 22mm thick high density, t&g overlay acoustic product for floors and ceilings, specially designed to add concentrated mass.The boards are used where there are high acoustic and fire performance demands. Properties Length: 1.2m.Width: 600mm.Thickness: 22mm.Sheet size: 0.72m2.Weight: 21kg per sheet.Pallet quantity: 36x sheets.Density: 1250kgs/m3.Edging: tongue & groove.Fire rating: 30 minutes for 22mm (22.5 kgs/m2).60 minutes with an additional layer of 12.5mm fire rated board. Ceiling improvementJCW 22mm T&G Cement Bonded Particle Boards will improve the overall acoustic performance based on the boards mass content and the ability to reduce sound leakage via T&G jointing. Resilient barsJCW 22mm T&G Cement Bonded Particle Boards supported on Single Fix resilient bars (max weight approx 30kg.m2) or Twin Fix resilient bars (max weight approx 50kg.m2) will considerably improve the airborne and impact performance.