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Verified by manufacturer over a year ago

Interfloor Ltd Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Underlay suitable for the stretch-fit and double-stick installation of carpets.

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Underlay suitable for the stretch-fit and double-stick installation of carpets.

Features and benefits:

  • Polyurethane rebond.
  • Suitable for flame retardant applications.
  • End use classification (to BS 5808): HC/U, heavy contract use.

General information


Pr_35_57_11_11 Cellular plastics underlaysPrimary


M50/170 Carpeting

M50/25 Carpeting

Product range

Carpet Underlays

Specification data - Cellular plastics underlays

Product Reference


Standard product features

Nominal square weight:

1015 g/m².

Nominal density:

145 kg/m³.

Roll area:

15.07 m² (1.33 x 11.33 m).

Nominal roll weight:

15.3 kg.

Nominal thickness:

7 mm.


No objectionable odour.

Colour/ backing:

Yellow polyethylene/ polyethylene with reinforcing scrim.

Impact sound reduction (Delta Lw):

34 dB.

Emissions (US Carpet and Rug Institute):

Meets low VOC emission criteria. Certified GLP051 Cat CC2 PU.

Thermal resistance:

1.99 togs.

Technical characteristics:

  • Work of compression (minimum 50 J/m²): >140 J/m².
  • Retention of work of compression (minimum 40%): >90%.
  • Loss in thickness after dynamic loading (maximum 15%): <5%.
  • Loss in thickness after static loading (maximum 15%): <5%.
  • Resistance to cracking (not greater than 50 mm): Pass.
  • Hot metal nut test (tested in Interfloor laboratory) Pass.
  • Breaking strength (length/ width) minimum 40N: >90/ >50N.
  • Extension under force (length/ width, maximum 10%) at 40N: <10/ <10%.

Test Performance to US Standards:

  • CFD (Compression Force Deflection): 0.9 PSI @ 25% deflection.
  • CFD (Compression Force Deflection): 3.1 PSI @ 50% deflection.
  • CFD (Compression Force Deflection): 6.3 PSI @ 65% deflection.
  • Recommended use: Moderate traffic class I.


  • Hot metal nut test: Low radius of effects of ignition.
  • Critical radiant flux: Category 1 (0.53 W/cm²).
  • Reaction to fire classification: Bfl-s1.
  • China National FR Test (at China National Test Centre) Bf1 – s1,t1.
  • Russian GOST FR Test Classification: KM3.

Green credentials:

  • Recyclable: At the end of the underlay's useful life it can be 100% recycled. MR 2.0: points available. It can be recycled.
  • Recycled content: Contains not less than 95% post-consumer recycled material. MR 4.0: points available. Recycled content.
  • Indoor air quality: Meets or exceeds the industry standard for indoor air quality as established by the CRI Green Label Programme. IEQ 4.3: points available. Product is Green Label Plus certified.
  • Regional materials: Production Facility, Haslingden, BB4 4LS, UK. Where used within 500 miles of production facility, MR 5.0: points available.

Third party certifications

  • CRI: Green Label Plus

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