NBS Source
Karma Visco 400/600


An acoustic overlay board designed to attenuate impact and airborne sound passing through existing timber floors and can be laid direct to joists. It comprises two layers of moisture resistant chipboard, separated by visco - elastic sound damping strips with an acoustic felt resilient layer on the underside.

Features/ Benefits:

  • Excellent impact and airborne sound performance.
  • Tongue and groove profile for ease of installation.
  • Laid directly on to the joists.
  • Can be used with most floor finishes.

General information

Uniclass 2015

Pr_25_71_97_60 ParticleboardsPrimary


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 - Particleboards

Product Reference

Karma Visco 400

35 mm thickness, 20.5 kg/m², for 400 mm joist centres.

Karma Visco 600

39 mm thickness, 23.6 kg/m², for 600 mm joist centres.



Acoustic sealant

Reduc isolation strip

Reduc joint adhesive

Reduc Soundslab 100 mm

Standard product features

Size (l x w):

2400 x 600 mm.

Laid area per board:

1.44 m².

Similar products from CMS Danskin Acoustics

Karma Acoustic Overlay 23

Karma Acoustic OverlayPlus 23

Karma Joistdeck 37



SoundDeck Extra

SoundDeck Extra