Acoustic Flooring Products Ideal For Timber Joisted Floors

Isocheck 32T

Acoustic floor system: direct to joists with a resilient bar ceiling


The Isocheck 32T acoustic floor system is designed to reduce impact sound transmission through a timber joisted floor where both the floor boards and the ceiling have been removed.

When installed as part of an Isomass approved separating floor construction, it enables a timber floor to meet the sound transmission regulations of Approved Document E 2003 and subsequent amendments in 2004, 2010, 2013 and 2015.

Isocheck 32T consists of 6mm reconstituted ACF (Acoustic chip foam) and 4mm Isofiba, bonded to 22mm P5 V313 moisture resistant chipboard.

View more technical information and downloads

To be used over new or existing joists for refurbishments or conversions with a new resilient bar ceiling as illustrated or approved by Isomass (on application to for our free acoustic detail design service).

Treated floor with:
Isocheck 32T with a resilient bar ceiling

Site results (in red) for Building Control approval.

Laboratory results (in blue) for comparison.

Overall size: 2400mm x 600mm x 32mm
Resilient layer thickness: 10mm
Resilient layer material: 6mm reconstituted ACF - (Acoustic chip foam) and 4mm Isofiba
Weight: 23.0kg per sheet

Isocheck 32T acoustic flooring, supplied by Isomass Ltd. Unit 14 Papworth Business Park, Stirling Way, Papworth Everard, Cambridgeshire CB23 3GY and installed in accordance with manufacturer’s instructions / recommendations.

Full installation instructions for Isocheck 32T are available as a pdf to download. Go to the Downloads tab on this page.

Isocheck 32T installation instructions


Isocheck 32T product data sheet


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  • Isocheck 32T acoustic flooring.
  • 200mm x 70mm timber joists @ 450mm centres.
  • 100mm 45g/m3 insulation between joists (total ceiling mass 20kg/m2)
  • 20kg/m2 double boarded 25mm o/a plasterboard 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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