Home > Companies > Custom Audio Designs Ltd > Acoustic Floor Resilient Impact Layer Isobase R50

Designed to provide excellent acoustic sound insulation with ease of installation. It also supplies a degree of protection against airborne noise and improves thermal insulation.

Being a closed cell foam it resists water absorption preventing fungal and bacterial growth. In addition, the foam is inert and does not rot or decay, even when exposed to high humidity and elevated temperatures.

This product can also be used on top of a concrete floor if the product is bonded down.


  • Complies with/ exceeds Part E of new Building Regulations.
  • Gives significant reduction in impact noise and vibration.
  • Easy to cut and install.
  • Low cost.
  • Water resistant.
  • Prevents growth of fungi, bacteria and mildew.
  • Does not significantly raise the floor level – only 5 mm thick.
  • Very flexible.
  • Does not rot or decay, even when exposed to high temperatures and humidity.
  • Lightweight.


  • Suitable for timber floors.
  • Reduces impact noise and vibration.
  • Can be used in new or converted buildings.

Standard product features

Roll size:

15 x 1 m.


5 mm.


0.17 kg/m².



Fire rating:

60 minutes (full system).

Acoustic performance:

Refer to manufacturers data sheets.


33 kg/m³.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-95/470 Particleboard

Product specification

An important note about specifying



Custom Audio Designs Ltd


+44 (0)1730 269572

Product reference

Acoustic Floor Resilient Impact Layer Isobase R50

Manufacturer details

5 Ridgeway Office Park,
Bedford Road,
Hampshire, GU32 3QF
Tel +44 (0)1730 269572
Fax +44 (0)1730 265846
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