Celotex PIR Insulation Board XR4000

Last Updated: October 15, 2015 15:03

Celotex XR4000 is a multi purpose insulation board enabling users to achieve lower U-values with a single layer of insulation than has previously been possible.

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Product Details

Celotex XR4000 is a high quality insulation board targeted at cut to fit applications to be used between rafters and joists.

This board helps users achieve lower U-values with just a single layer and is appropriate for flooring and walls.

This insulation board provides the thickest polyisocyanurate (PIR) rigid foam board available on the market which delivers incredible thermal insulating properties.

Features & Benefits

  • Helps meet the current and future requirements of Approved Document L and Section 6, BREEAM and The Code for Sustainable Homes

  • Includes low emissivity foil facings giving improved thermal insulation with cavity air spaces

  • Future proofs the energy performance of new and existing buildings

  • Is suitable for use in a number of applications including roof, wall and floor systems

  • Provides the thickest PIR insulation currently available from stock within the market

  • Is certified under BBA certificate number 95/3197 and 09/4667

Specification & Product Codes



Rigid Polyisocyanurate

BRE Ecopoints:
BR 443:2006
3rd party Accreditation:
BS 476-21:1987, BS EN 1996-2:2006, BS EN ISO 6946:2007
Approval in SAP 2009, Appendix K and iSBEM



778049 - 1200 x 2400 x 110mm

778050 - 1200 x 2400 x 120mm

778051 - 1200 x 2400 x 130mm

778052 - 1200 x 2400 x 140mm

778053 - 1200 x 2400 x 150mm

778054 - 1200 x 2400 x 165mm

778055 - 1200 x 2400 x 200mm