The efficient, thin and ultra-resistant acoustic underlay - NEW
insulFib 3+ is a thin acoustic underlay which aims to reduce the impact sound transmission between the different floors of a building. It has to be placed under a floating sand and cement screed. Alternatively, it can also be placed under a liquid screed.
Recent tests carried out by the CSTB in accordance with NF EN ISO 717-2 certify the outstanding performances of insulFib 3+.
Two-component acoustic felt
insulFib 3+ is a bi-component acoustic felt coated with a highly resistant spunbond non-woven fabric with a thin adhesive overlap of ± 6 cm width. This product has an extremely low dynamic stiffness since its resonance frequency is only at ± 50 Hz. This grants the product a remarkably good impact and high airborne sound insulation.
≥ 3,5 mm (under 2 kPa)
Blue (spunbond non-woven) + White (felt)
Spunbond non-woven fabric, Bi-component acoustic felt
Insulation against impact noise:
∆ L w = 22 dB CSTB 2019 AC19-26080209
Insulation against airborne noise:
∆ R w, heavy = 8 dB CSTB 2019 AC19-26080209
± 290 g/m²
s’t = 9 MN/m³
R = 0,10 m²K/W (1 layer)
SC2 a4 A
50 m x 1 m + blue adhesive overlap (6 cm)