An acoustic underlay system suitable for installing 14 mm thick engineered flooring over a concrete or timber joist separating floor. It offers a stable underfloor with high thermal insulation and outstanding levelling abilities. Flooring is fixed to a timber profile which is isolated from the base floor.

Features/ Benefits:

  • Impact sound reduction of up to 22 dB Delta Lw
  • Floating system with inherent levelling properties.
  • Thermal insulation properties.
  • Nailing strip secures hardwood but is isolated from the subfloor.
  • Easy installation.

General information

Uniclass 2015

Pr_25_57_06_97 Wood fibre batt insulationPrimary


K21/10 Wood laminate flooring

K21/111 Wood floating floor

K21/115 Wood laminate flooring

K21/120 Battened wood flooring

K21/130 Battened wood floating floor

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Specification data - Wood fibre batt insulation

Product Reference




Karma acoustic perimeter strip

Standard product features

Size (l x w):

  • Board: 1200 x 380 mm.
  • Profile: 2000 x 50 mm.


  • Board: 40 mm.
  • Profile: 35 mm.

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