Acoustic Floor 20

Acoustic Floor 20 system is designed to reduce transmission through timber floors in situations where finished floor height is critical.

Acoustic Floor 20 boards consist of a layer of 8mm reconstituted ACF (Acoustic Chip Foam) bonded to 12mm p5 moisture resistant chipboard.

When installed as part of a complete sound reduction system, it enables a timber floor to meet the sound transmission regulations of Approved Document E 2003 and subsequent amendments in 2004, 2010, 2013 & 2015.

View more technical information and downloads

To be used over existing floorboards for conversions, refurbishments or most decoupled ceilings in new build projects.

Treated floor with:
Acoustic Floor 20
R,w+ Ctr
DnT,w+ Ctr
Impact improvement 18dB ΔLw

Site results (in red) for Building Control approval.
Laboratory results (in blue) for comparison.

Overall size: 2400mm x 600mm x 20mm
Resilient layer thickness: 8mm
Resilient layer material: Reconstituted ACF (Acoustic Chip Foam)
Resilient layer fire test: Tested to BS 5852-2:1982
Weight: 11.8kg per sheet

Acoustic Floor 20 supplied by Isomass Ltd. Units 10 & 11, Avenue Business Park, Elsworth, Cambridgeshire CB23 4EY and installed in accordance with manufacturer’s instructions / recommendations.

Full installation instructions for Acoustic Floor 20 is available as a pdf to download. Go to the Downloads tab on this page.

Acoustic Floor 20 product data sheet


Acoustic Floor 20 installation instructions

  • Acoustic Floor 20 system on existing timber floor (subject to condition) or a new 18mm chipboard deck.
  • 200mm x 50mm timber joists@ max. 450mm centres.
  • 100mm 45kg/m3 insulation between joists.
  • Min. 20kg/m2 double boarded ceiling on resilient bars @400mm centres perpendicular to joist direction.
  • Acoustic flanking band reduces impact vibration leaking via structural walls and assists in reducing airborne sound paths.

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