Bespoke Acoustic Flooring System For Concrete Floors

Isocheck 27C, 23C, 18C & 14C

Acoustic floor systems: for concrete floors

Isocheck 27C, 23C, 18C & 14C acoustic floor systems are designed to reduce impact sound transmission through concrete floors, this system does not need the additional protection of a moisture barrier (VCL) vapour control layer because the Isopoli will not absorb the moisture from a virgin screed.

Isocheck 27C, 23C & 18C consist of a 5.5mm layer of cross linked Isopoli bonded to 22mm, 18mm and 12mm P5 V313 moisture resistant chipboard respectively, whereas Isocheck 14C consists of a 5.5mm layer of cross-linked ‘Isopoli’ bonded to 9mm moisture resistant medium density fibreboard.

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

View more technical information and downloads

To be used over concrete floors for conversions, refurbishments or new build with a new ceiling as illustrated or approved by Isomass (on application to for our free acoustic detail design service).

Treated floor with: DnT,w+ Ctr L’nT,w
Isocheck 27C 53dB 54dB
Isocheck 23C 53dB 53dB
Isocheck 18C 51dB 53dB
Isocheck 14C 51dB 52dB

Based upon the typical construction examples

Complies with New Build Robust Detail descriptive FFT5 within E-FC-1, E-FC-2 and E-FS-1.

Overall size: Isocheck 27C
Isocheck 23C
Isocheck 18C
Isocheck 14C
2400mm x 600mm x 27mm
2400mm x 600mm x 23mm
2400mm x 600mm x 18mm
1200mm x 600mm x 14mm
Resilient layer thickness: 5.5mm
Resilient layer: Isopoli cross linked foam
Weight: Isocheck 27C
Isocheck 23C
Isocheck 18C
Isocheck 14C
22.8kg per sheet
18.8kg per sheet
13.0kg per sheet
5.15kg per sheet

Isocheck 27C, 23C, 18C or 14C 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 27C, 23C, 18C and 14C are available as a pdf to download. Go to the Downloads tab on this page.

Isocheck 27C, 23C, 18C & 14C Installation instructions


Isocheck 27C, 23C, 18C & 14C product data sheet

  • Isocheck 27C, 23C, 18C or 14C acoustic flooring.
  • ≥300kg/m2 cast in-situ concrete with 80kg/m2 sand/cement screed or 40mm proprietary screed.
  • min. 75mm void formed by metal frame suspended ceiling system plus ≥10kg/m2 gypsum board ceiling (left) or
  • 50 x 75mm timber battens supporting 10kg/m2 gypsum board ceiling supported on resilient bars @ 400mm centres, perpendicular to the battens min. 75mm below underside of sub-floor (right).

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