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Acoustic Flooring

Monodeck 37T System: Overlay Platform System Direct to Floorboards

Monodeck 37T System: Overlay Platform System Direct to Floorboards

The Monodeck 37T system is designed to replace floorboards and reduce sound transmission.

•  New Build
•  Refurbishments
•  Conversions
•  Listed buildings requiring minimal structural change

The monodeck 37T system is designed to replace floorboards and reduce sound transmission.

Monodeck 37T consists of a layer of 15mm reconstituted ACF (Acoustic Chip Foam) bonded to 22mm V313 P5 moisture resistant chipboard.

When installed as part of a complete party floor, this system enables a traditional timber joisted floor to meet the sound insulation standards of Approved Document E 2003 and subsequent amendments in 2004, 2010 and 2013.


To be used direct to joists for conversions, refurbishments or new build with a new plasterboard or existing lath and plaster ceiling.

Performance (on the construction illustrated)

Treated floor with:
DnT,w+ Ctr
Monodeck 37T

Product data

Overall size: 2400mm x 600mm x 37mm
Resilient layer thickness: 15mm

Resilient layer: High density reconstituted ACF
(Acoustic Chip Foam)
Weight: 23.5kg per sheet


The acoustic floor shall be:

Monodeck 37T, manufactured by Isomass Ltd. Unit 11, Avenue Business Park, Off Brockley Road, Elsworth, Cambridgeshire, CB23 4EY and installed in accordance with manufacturer’s instructions / recommendations.


Apply Isocheck Acoustic Angled Flanking Band on the edges of the Isocheck boards just before they are pushed against the perimeter walls to isolate the board from the wall.

Lay monodeck 37T directly to the timber joists, in brick bond pattern, applying Isocheck adhesive to all tongued and grooved panel joints without the need for mechanical fixings.

Install skirting and trim off excess Flanking Band.

Full installation instructions for monodeck 37T are available to download by clicking on the link to the left of this page. Installation instructions must be used in conjunction with this information and/our information contained in the datasheet when laying the monodeck 37T floating floor system.


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Isocheck 37T

  • Monodeck 37T system on 200mm x 70mm timber joists @ 450mm centres.
  • 100mm 45Kg/m3 insulation between joists.
  • lath and plaster ceiling or 30mm o/a double boarded ceiling (min. 20kg/m2) fixed to timber joists.
  • Acoustic flanking band reduces impact vibration leaking via structural walls and assists in reducing airborne sound paths (on both constructions).
  • Note: tested only with direct fixed ceilings.

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