Insulit Bi+8 - Acoustic underlay for concrete floors - Insulco

Insulit Bi+8 - Acoustic underlay for concrete floors - Insulco

Acoustic underlay designed to limit the transmission of impact noise and airborne noise between floors.

Even more resistant , it offers even higher acoustic performance and simplified installation.

Composition :

Insulit Bi+ 8 consists of a layer of embossed polyolefin foam (thickness ≥ 3.5 mm), physically crosslinked with closed cells associated with an acoustic felt with low dynamic stiffness (thickness ≥ 5 mm).

A two-component solution is more effective than a single-layer solution because the felt and foam cover a wider frequency range . The felt corrects low frequencies , while the foam corrects mid and high frequencies .

Benefits :

• Attenuation of impact noise and airborne noise.
• Supplied in rolls, easy and quick to install.
• Very effective. Tape supplied for fixing the covers.
• Physically cross-linked polyolefin: guaranteed longevity.
• Closed microcells.
• Thin, light and flexible.
• Low dynamic rigidity = superior acoustic performance.
• Low creep.
• Recent CSTC report = guaranteed results.

Features :

• Impact noise reduction:
  • ∆Lw = 28 dB on bare slab without screed.
  • ∆Lw = 35 dB with pre-screed.
• Acoustic measurement level:
  • Ln,r,w = 50 dB on bare slab without screed.
  • Ln,r,w = 43 dB with pre-shroud.
• Materials: Physically cross-linked polyolefin and acoustic polyester felt.
• Thickness: ≥ 8.5 mm under 1.5 kPa.
• Colour: Orange (foam) / anthracite (felt).
• Dynamic stiffness: s't ≤ 8 MN/m³ (EN 29052-1).
• Tear resistance: 50 - 50 N (EN 12310-1).
• Compression: ±10% under 2 kPa (tolerance 10%).
• Thermal resistance: R = 0.24 m²·K/W (EN 823:2013).
• Thermal conductivity:
  • λ = 0.0356 W/m·K at 10°C (foam) (EN 12667:2001).
  • λ = 0.0353 W/m·K at 10°C (felt) (EN 12667:2001).
• Size: 30m x 1.50m.
• Weight: ±320 g/m² (weight of one roll: ±15 kg).
• Covering: Fixing with the roll of kraft tape provided.
• Packaging: In plastic with installation instructions.

Attention :

• For logistical reasons, orders that are too small or too light may be declined. Generally, the minimum order is 20m², but we are open to discussing smaller orders.
• All orders with problematic or insufficient logistics can be picked up directly by the customer.

FAQ - Frequently Asked Questions

1. What is the purpose of Insulit Bi+8?
   Insulit Bi+8 is used to reduce impact noise transmitted through a concrete floor, such as footsteps, falling objects or moving furniture.
2. Is it compatible with underfloor heating?
   This depends on the heating system and the final coating. It is recommended to check the overall thermal compatibility with the manufacturer or the project's engineering firm.
3. Can it be used under tiles?
   No, Insulit Bi+8 is not intended for installation under glued tiles without a specific technical solution (floating screed, dedicated acoustic system).
4. What is the thickness of the underlay?
   The thickness is 8 mm, offering an excellent compromise between acoustic performance and low floor rise.