Step 100


Underlay suitable for the stretch-fit installation of carpets.

Features and benefits:

  • Sponge rubber.
  • End use classification (to BS 5808): GD/U, general domestic 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

Step 100, TASTEP100

Standard product features

Nominal square weight:

3017 g/m².

Roll area:

15.07 m² (1.37 x 11 m).

Nominal roll weight:

45.5 kg.

Nominal thickness:

8.9 mm.


No objectionable odour.

Colour/ backing:

Green/ unprinted Textron® backing.

Impact sound reduction (Delta Lw):

38 dB.

Emissions (US Carpet and Rug Institute):

Meets low VOC emission criteria.

Antimicrobial and mildew resistance:


Thermal resistance:

1.32 togs.

Technical characteristics:

  • Work of compression (minimum 50 J/m²): 115 J/m².
  • Retention of work of compression (minimum 40%): 73%.
  • Compression after dynamic loading: 6.1 mm.
  • Loss in thickness after dynamic loading (maximum 15%): 4.6%.
  • Loss in thickness after static loading (maximum 15%): 5.5%.
  • Resistance to cracking (not greater than 50 mm): Pass.


  • Hot metal nut test (tested in Interfloor laboratory): Low radius of effects of ignition.
  • Russian GOST FR Test Classification: KM5.

Third party certifications

  • CRI: Green Label Plus

Similar products from Interfloor Ltd