Underlay suitable for the stretch-fit installation of carpets.

Features and benefits:

  • Sponge rubber.
  • Suitable for underfloor heating.
  • End use classification (to BS 5808): L/U, luxury use.

General information

Uniclass 2015

Pr_35_57_11_13 Cellular rubber underlaysPrimary


M50/170 Carpeting

M50/25 Carpeting

Specification data - Cellular rubber underlays

Product Reference

King, TADK080013

Standard product features

Nominal square weight:

4238 g/m².

Roll area:

10.96 m² (1.33 x 8.24 m).

Nominal roll weight:

46.6 kg.

Nominal thickness:

8.3 mm.


No objectionable odour.

Colour/ backing:

Black/ printed Textron® backing.

Impact sound reduction (Delta Lw):

42 dB.

Emissions (US Carpet and Rug Institute):

Meets low VOC emission criteria.

Thermal resistance:

0.8 togs.

Antimicrobial and mildew resistance:


Technical characteristics:

  • Work of compression (minimum 50 J/m²): 150 J/m².
  • Retention of work of compression (minimum 40%): 98%.
  • Compression after dynamic loading: 4.6 mm.
  • Loss in thickness after dynamic loading (maximum 15%): 2.5%.
  • Loss in thickness after static loading (maximum 15%): 3%.
  • Resistance to cracking (not greater than 50 mm): Pass.
  • Breaking strength (length/ width) minimum 40N: 182/ 126N.
  • Extension under force (length/ width, maximum 10%) at 40N: 2.2/ 1.0%.


Hot metal nut test (tested in Interfloor laboratory): Low radius of effects of ignition.

Third party certifications

  • CRI: Green Label Plus

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