Isocheck Re-Mat Base 3 & 6 Systems : under screed system for beam and block floors

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product data sheet

0845 838 3399


•  New build
•  Refurbishments
•  Conversions

The isocheck Re-Mat Base 3 & 6 systems are designed to reduce impact sound transmission through concrete beam and block floors.

Isocheck Re-Mat Base 3 & 6 comprises 3mm, 6mm or 10mm (for high load) reconstituted bonded rubber layer that has been designed to be placed within a masonry structural floor directly below the screed. This isolates the screed from the structural sub floor, and provide sufficient impact absorbsion to place it amongst the top performing systems available.

By ensuring that all the joints ar etaped, bridging will be eliminated which is the single greatest cause of failure of any system of this type.

Isocheck Re-Mat Base 3 & 6 have been tested to BS EN 29052-1:1992 and satisfy the dynamic stiffness requirement with a figure of 10MN/m3.

Additional benefits of Isocheck Re-Mat Base 3 & 6:

  Tested as a single 3 or 6mm layer.
  Composition prevents water transmission which can impair
   acoustic performance.
  Rolls are easy to handle.
  All installations over 250m2 come with a free site inspection
   prior tolaying the screed.


To be used on concrete beam and block subfloors for conversions, refurbishments or new build.

Performance (on the construction illustrated)

Construction complies with the latest version of Approved Doc E of the building regulations. Under separate UKAS laboratory tests it was also found to provide an impact improvement of 18dB ΔLw when placed below a 65mm sand/cement screed.

Product data

Roll size: 1.0m x 20m (Re-Mat Base 3)
1.25m x 10m (Re-Mat Base 6)
Thickness: 3mm (Re-Mat Base 3)
6mm (Re-Mat Base 6)
10mm (for high load)
Composition: Bonded rubber fibres
Colour: Black


The acoustic floor shall be:

Isocheck Re-Mat Base 6, supplied by Isomass Ltd. Units 10 & 11, Avenue Business Park, Off Brockley Road, Elsworth, Cambridgeshire, CB23 4EY and installed in accordance with manufacturer’s instructions / recommendations.


The floor surface should be swept free of any loose debris that may damage or bridge the system.

Butt joint and seal all roll edges of isocheck Re-Mat Base 3 or 6. At perimeters overlap Re-Mat Base 3 or 6 onto a right angle flanking edge strip which should be turned up all vertical surfaces to allow a minimum 50mm to protrude above the intended FFL of the screed.

Perimeter overlaps or butt joints should be sealed with a min. 100mm wide duct tape.

Services that penetrate the screed should be isolated by wrapping with Re-Mat Base 3 or 6 which again would be taped.

When trafficing the floor take care not to perform any unecessary actions that may cause any of the taped joints to be forced apart.

Installation instructions must be used in conjunction with this information and/our information contained in the datasheet when laying the Isocheck Re-Mat Base 3 or 6 floor systems.


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Soft Floor
  • 80kg/m2 sand/cement screed or 65mm proprietary screed.
  • Isocheck Re-Mat Base 3 or 6.
  • ≥ 300kg/m2 minimum structural beam and block floor with optional levelling screed.
  • min. 75mm void formed by metal frame suspended ceiling system plus ≥10kg/m2 fire-rated board ceiling.





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