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Celotex 100mm Cavity Wall Insulation Board CW4100 1.2m x 450mm - 3.24m2 Pack

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£67.99 Incl. VAT
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This Celotex CW4100 insulation board has been designed specifically for partial fill insulation for masonry cavity walls. This high-performance rigid polyisocyanurate (PIR) is available in 100mm thickness and is sized to fit between cavity wall ties. It's suitable for use in both new and existing builds as well as extensions. It has excellent thermal conductivity value of 0.022 W/m.K and includes a low emissive aluminium foil facing which helps it achieve impressive U-values. So, you shouldn't be surprised to find out that this sturdy PIR board is among the best-performing options on the market and offers reliable long-term savings.

CW4100 is sized specifically to fit the standard wall tie spacing requirements. So, no cutting is required, and the board is quick and easy to install. As long as it's installed correctly, it can help meet carbon dioxide emissions and energy use targets set by the national building regulations. Additionally, CW4100 comes with a BBA (British Board of Agrement) certificate, so you know it's designed to the highest industry standards. It even has BRE (Building Research Establishment) Green Guide Rating of A, which will help boost your environmental performance substantially.

Features & Benefits: Celotex 100mm Cavity Wall Insulation Board CW4100 1.2m x 450mm - 3.24m2 Pack

  • High-quality partial fill PIR insulation board
  • Easy & quick to install
  • Suitable for use in masonry cavity walls
  • Low emissivity foil facings for improved thermal insulation performance in cavity air spaces
  • BBA certified
  • BRE Green Guide Rating of A for sustainability

Product Specification

  • Length: 1200mm
  • Width: 450mm
  • Thickness: 100mm
  • Pack Coverage: 3.24m2
  • R-Value: 4.50m2K/W
  • Maximum weight: 3.65kg/m2
  • Thermal conductivity: 0.022W/m.K, according to BS EN 13165 for factory made rigid polyurethane foam (PU) product
  • Compressive strength (kPa): CS(10\Y)120
  • Spread of flame: Euroclass E Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.


Length 1200mm Thickness 100mm Width 450mm


Thermal Conductivity 0.022 W/mK Edging Square Edge Facing Foil Product Type Board
Material PIR


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