Regupol® 4515 Multi

A tough, resilient, acoustic underlay ideally suited to all new build constructions to achieve compliance with the requirements of Part E of Building Regulations.

Regupol® 4515 Multi is manufactured from PUR foam and cork granules and is compatible with all types of floor finishes including ceramic tiles, vinyl, wood and laminates, carpet, Marmoleum and linoleum.

It offers long-term performance without bottoming out under high point loads and is compatible with underfloor heating systems.

General information

Uniclass 2015

Pr_25_57_06_71 Resilient layer insulationPrimary


K21/10 Wood laminate flooring

K21/111 Wood floating floor

K21/115 Wood laminate flooring

K21/145 Composite laminate flooring

K21/146 Laminate flooring

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Specification data - Resilient layer insulation

Product Reference

Regupol® 4515 Multi


3 mm

As standard.

4.5 mm

Standard product features

Dimensions (t x w x l):

  • 3 mm x 1 m x 20 m.
  • 4.5 mm x 1 m x 18 m.


  • Tensile strength (DIN 53571; 4.5 mm thick): Approx. 0.9 N/mm².
  • Elongation at break (DIN 53571): Approx. 25%.
  • Thermal conductivity: 0.12 W/mK.

Impact sound insulation:

ΔLw (BS EN ISO 140-8:1998):

  • On its own: 18 dB.
  • Beneath carpet: 34 dB.
  • Beneath vinyl: 20 dB.
  • Beneath Flotex: 22 dB.
  • Beneath Marmoleum/ linoleum: 18 dB.
  • Beneath laminate: 18 dB.
  • Beneath ceramic tiles: 19 dB.

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