9.3 Floor finishes

9.3.3 Insulation

Thermal and acoustic insulation shall provide appropriate performance, and be suitable for the intended location and use.

Materials and constructions which are in accordance with building regulations are generally acceptable.

Suitable sound insulation materials include:

  • flexible material
  • mineral fibre quilt insulation
  • board material for use under screeds (eg EPS SD grade expanded polystyrene)
  • proprietary products which have been assessed in accordance with Technical Requirement R3.

Table 1: Thermal insulation materials

MaterialStandardGrade or description
EPS (expanded polystyrene)BS EN 1316370
PUR (rigid polyurethane)BS 4841For use under screeds
PIR (rigid polyisocyanurate)BS 4841For use under screeds
Fibre building boardBS EN 622Insulating board (softboard)
Proprietary material Technical Requirement R3

Last updated: 2nd January 2024

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