Purpose made resilient strip for impact sound insulation.
HUSH-Felt 25 meets the Building Regulation requirement for 80/140 kgs/m³ density and 25 mm nominal thickness. Tough polypropylene fibres are felted to a polyester matrix, permitting secure stapling to joist tops. The polypropylene fibres maintain their resilience over the long term, and will not fracture, perish, harden or settle more than a nominal 12%. The product is non-carcinogenic.
HUSH-Felt 25 comprises a double layer of HUSH-Felt strip, 50 mm wide, factory stapled to 140 x 50 mm hardboard slats, each having a 25 mm gap to accommodate stapling, with 16 mm staples, to joist tops. The slats present a firm, smooth surface to support the tongued and grooved short ends of the boards over the joist tops.
Chipboard, OSB or plywood tongued and grooved sheet flooring is preferred, laid across the treated joists. Traditional wood strip flooring must be glued and screwed together on intermediate timber battens. Nailing is impracticable over a resilient layer, and it is extremely difficult to achieve a satisfactory 'squeak free' floating floor in this manner. Alternatively, a hardwood veneer may be glued and pinned to a sheet floating layer. No nails or other fastenings penetrate the HUSH-Felt 25, and the floor must be permitted to float freely between walls and around door frames and pipes. A bead of water proof PVA adhesive is applied to the hardboard slats as the flooring is laid and also the tongued and grooved joints of each board (other than access panels).
K11/115 Battened plywood floating floor
K11/125 Battened particleboard floating floor
K11/135 Battened oriented strand board floating floor
K11/145 Battened cement-bonded particleboard floating floor
K11/20 Battened particleboard floating floor
K11/215 Plywood floating floor
K11/225 Particleboard floating floor
K11/235 Oriented strand board floating floor
K11/245 Cement bonded particleboard floating floor
K11/25 Particleboard floating floor
K11/275 Acoustic separating floor system
K11/295 Floating floor system
K20/150 Battened timber board floating floor
K20/20 Battened timber board floating floor
K21/10 Wood laminate flooring
K21/111 Wood floating floor
K21/130 Battened wood floating floor
K21/140 Battened wood laminate flooring
K21/145 Composite laminate flooring
K21/146 Laminate flooring
K21/20 Composite laminated flooring
Standard product features
Stapled to joist tops.