Royale 550


Underlay suitable for the stretch-fit installation of carpets.

Features and benefits:

  • Sponge rubber textured flat.
  • End use classification (to BS 5808): HC/U, heavy contract 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

Royale 550, TAROYALE550

Standard product features

Nominal square weight:

2712 g/m².

Roll area:

10 m² (1.33 x 7.52 m).

Nominal roll weight:

27.12 kg.

Nominal thickness:

5.5 mm.

Mean original thickness from nominal thickness (maximum 12%):


Difference between maximum/ minimum original thicknesses (maximum 3 mm):

0.3 mm.


No objectionable odour.

Colour/ backing:

Black/ unprinted Textron® backing.

Impact sound reduction (Delta Lw):

30 dB.

Emissions (US Carpet and Rug Institute):

Meets low VOC emission criteria.

Antimicrobial and mildew resistance:


Thermal resistance:

0.7 togs.

Technical characteristics:

  • Work of compression (minimum 50 J/m²): 80 J/m².
  • Retention of work of compression (minimum 40%): 71%.
  • Compression after dynamic loading: 3.1 mm.
  • Loss in thickness after dynamic loading (maximum 15%): 4.3%.
  • Loss in thickness after static loading (maximum 15%): 5.1%.
  • Resistance to cracking (not greater than 50 mm): Pass.


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

Third party certifications

  • CRI: Green Label Plus

Similar products from Interfloor Ltd