insulFib 3+
Thin and ultra-resistant 22 dB
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+.
Lightweight, quick and easy to lay
insulFib 3+ is packaged in rolls (50 m x 1 m), making it quick and easy to unroll and lay. Moreover, thanks to its low weight (< 350 g/m²) it's much easier to handle than heavier solutions on the market.
Good performance: Delta Lw = 22 dB (CSTB)
The insulFib 3+ membrane achieved a delta Lw of 22 dB in CSTB tests in 2019.
With a resonance frequency under 50 Hz, this product offers extremely low dynamic stiffness. This feature delivers high performance in impact sound insulation and airborne noise reduction.
Tearproof, highly resistant, but easy to cut
insulFib 3+ is a two-component resilient acoustic felt covered with an ultra-resistant spunbond nonwoven. The product is easy to cut with a cutter or universal shears.
Easy folding, integrated flat overlap
The underlay is designed with a thin flap overlap and supplied with waterproof tape to ensure watertightness.
Its special structure and low thickness of 3.5 mm make the product highly flexible and easy to rise alongside the wall.
Acoustic insulation for screeds: high-performance & economical
insulFib 3+ is a high-performance, easy-to-handle, time-saving screed insulation at a competitive price.
 |
Characteristics:Thickness: 3,5 mm Colour: Blue (spunbond non-woven) + White (felt) Material: 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 Dynamic stiffness: s’t = 13 MN/m³ Weight: 310 g/m² (under 4kg) Thermal resistance: R = 0,10 m²K/W (1 layer) Tearing resistance (nail shank): 180 N Tearing resistance (nail shank): 180 N Puncture resistance: 0,1 mm Watertightness at 2 kPa (EN 1928): W1 (compliant) – TSUS 2024 90-24-0273 Compressibility ranking: SC1 a4 A – (acc. to NF DTU 52.10 standard) Roll: 50 m x 1 m + flat overlap (6 cm) |
