• Isomass Ltd – Incorporated 2006

Isocheck 37T

Acoustic floor system: direct to joists with retained ceilings below

The Isocheck 37T acoustic flooring system is designed to replace floorboards and reduce impact sound transmission through a timber joisted floor where there is little or no access available to enhance the ceiling below for both sound insulation and additional fire protection.

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 and 2015.

Isocheck 37T consists of 10mm reconstituted ACF (acoustic chip foam) and the added isolation of a 5mm Isofiba layer, bonded to 22mm P5 V313 moisture resistant chipboard.

View more technical information and downloads

To be used directly on timber joists for conversions in conjunction with a direct fix ceiling (commonly found in listed buildings or projects where access to the ceiling is not easily accessable) as illustrated or approved by Isomass (on application to technical@isomass.co.uk for our free acoustic detail design service).

Treated floor with:
Isocheck 37T with a boarded ceiling
R,w+ Ctr
DnT,w+ Ctr

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

Overall size: 2400mm x 600mm x 37mm
Resilient layer thickness: 15mm
Resilient layer material: 10mm reconstituted ACF (acoustic chip foam) plus 5mm Isofiba
Weight: 23.6kg per sheet

Isocheck 37T acoustic flooring, 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 Isocheck 37T are available as a pdf to download. Go to the Downloads tab on this page.

Isocheck 37T Installation instructions


Isocheck 37T product data sheet

  • Isocheck 37T acoustic flooring.
  • 200mm x 70mm timber joists @ 450mm centres*.
  • 100mm 45kg/m3 insulation between joists.
  • Lath & Plaster ceiling or 30mm o/a double boarded ceiling (min. 20kg/m2) fixed to timber joists.
  • Note: Tested only with direct fixed ceilings.
  • Note: *Additional floor support may be required – commonly in the form of additional noggins.

Processing your enquiry...

Contact us

Or call us on 0845 838 33 99