Karma Visco 17/21


Shallow acoustic overlay boards designed to damp vibration and attenuate impact and airborne sound passing through floors with minimum loss of room height. They comprise substrate layers of moisture resistant MDF combined with either fibreboard or cement particleboard separated by sound damping strips. A resilient layer of acoustic felt is adhered to the underside.

Features/ Benefits:

  • Shallow construction - only 17 or 21 mm.
  • Acoustic chipfoam contours over minor irregularities.
  • Can meet Building Regulations (E&W) Approved Document E with resilient bar ceiling.

General information

Uniclass 2015

Pr_25_71_97_53 Medium-density fibreboardsPrimary


K11/125 Battened particleboard floating floor

K11/20 Battened particleboard floating floor

K11/225 Particleboard floating floor

K11/25 Particleboard floating floor

K11/275 Acoustic separating floor system

K11/30 Particleboard flooring

Specification data - Medium-density fibreboards

Product Reference

Visco 17

17 mm thickness, 9.1 kg/m², MDF, fibreboard and chipfoam.

Visco 21

21 mm thickness, 18 kg/m², MDF, cement-particle board and chipfoam.



Acoustic sealant

Reduc isolation strip

Reduc joint adhesive

Resilient bars

Standard product features

Size (l x w):

1200 x 600 mm.

Laid area per board:

0.72 m².

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