Produced from recycled rubber and high grade felt Sonolay™ B20 Soundproofing Acoustic Underlay is designed for soundproofing installation beneath carpets to give a superior reduction in impact noise through the floors below. It is suitable for all types of floor surfaces including wood, concrete, asphalt and is particularly recommended on uneven floors.
Sonolay™ B20 acoustic underlay is not designed to reduce airborne noise nuisance. To insulate against airborne noise, see our soundproofing information sheet for Quiet-Floor. However, on concrete floors, provided they have the required amount of mass (350kg/m2) the new regulations for both airborne and impact noise penetration through the floor will be met if Sonolay™ B20 is glued to the floor surface.
Description : Felt/rubber acoustic underlay Composition : Recycled Hair/jute/synthetic Nominal Thickness BS4051 : 10mm, 7/16" Nom. Weight 2455gm/m2 72 oz/yd2 Nom. Thickness (BS4051) 10mm 7/16" Roll Area 15m2 Technical Details Static Loading (BS4939) Thickness Loss 20.5% Retained factor 79.5% Dynamic Loading (BS4052) Thickness Loss 14.4% Retained Factor 85.6% Compression (BS4098 / BS5808) Before Dynamic Loading 172 J/m After Dynamic Loading 124 J/m Retained Loading 72% Tensile Strength (BS2576 / BS5808) Breaking Strength 170 N Elongation at 40N 3.8% Resistance to Cracking No Cracks Visible Flammability BS 4790 Hot Nut Low Radius Methenamine Pill ASTM D2859-76 Pass ISO Method BS 6307 Char Length 16mm Flame Retardency BS4790:1987 Pass Acousticel A10 conforms to flame retardency test BS4790: 1987 Thermal Conductivity BS4745 Resistance Factor 2.9 togs Impact Sound Improvement Index ISO Method 140 part 8 Delta Lw.34Db Sonolay™ B20 meets the transmission of sound regulatory standards for impact insulation when glued to a concrete floor. The tested sample meets the minimum performance requirements of BS5808: 1991 (1996)
Classification: Heavy Contract/Heavy Domestic BS 5808 Fitting should meet the British standard code of practice BS 5325, normally be undertaken by experienced fitters and should be laid rubber to the floor surface. Subfloors should be clean, dry and free of oil, grease and damp.
This product is used in conjunction with Dampalay™ S20 underlay please see Sonolay™ B20 soundproofing installation instructions
The contractor shall be responsible for the examination and acceptance of all conditions and project suitability prior to the installation.