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Underlay suitable for floating installation of laminate and solid timber floors.

Features and benefits:

  • Sponge rubber.
  • Suitable for underfloor heating.

Standard product features

Nominal square weight:

2407 g/m².

Roll area:

15.07 m² (1.37 x 11 m).

Nominal roll weight:

36.2 kg.

Nominal thickness:

3 mm.


No objectionable odour.

Colour/ backing:

Gold/ printed Textron® backing.

Impact sound reduction (Delta Lw):

21 dB.

Emissions (US Carpet and Rug Institute):

Meets low VOC emission criteria.

Antimicrobial and mildew resistance:


Technical characteristics:

  • Resistance to cracking (not greater than 50 mm): Pass.
  • Hot metal nut test (tested in Interfloor laboratory): Low radius of effects of ignition.
  • Compressive stress @ 25% strain: 70 kPa.
  • Compressive stress @ 50% strain: 400 kPa.
  • Tensile strength (length/ width): 1100/ 500 kPa.
  • Elongation at break (length/ width): 60/ 40%.

Thermal properties:

  • Thermal resistance (togs): 0.35 togs.
  • Thermal resistance (R-value): 0.035 m²K/W.
  • Thermal conductivity (U-value): 28.6 W/m²K.
  • Thermal conductivity (K-value): 0.086 W/mK.

Acoustic Sone wood/ laminate flooring test:

Drum sound emission, overall loudness (Sone): 57.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-20-15/315 Cellular rubber underlays

Product specification

An important note about specifying



Interfloor Ltd


+44 (0)1706 238820

Product reference

Heatflow Wood and Laminate, TAHEATWOOD

Manufacturer details

Interfloor Ltd,
Lancashire, BB4 4LS
Tel +44 (0)1706 238820
Fax +44 (0)1706 214737
NBS Plus