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Celotex GA4100 100mm PIR Insulation Board - 2.4m x 1.2m

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£52.50 Incl. VAT
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The endlessly versatile Celotex GA4100 multi-purpose insulation board is perfect for all sorts of applications such as pitched roofs, flat roofs, solid floors and masonry walls and steel framed and timber framed systems. Made of polyisocyanurate (PIR), it's easy to handle, cut and shape and so a convenient option. Thanks to an impressive thermal conductivity of 0.022 W/m.K, this high-performance insulation board delivers excellent thermal performance. With that mind, you shouldn't be surprised to find out that even though it's thinner than most similar products on the market, it easily meets the required U-value.

And that's not all! The innovative low emissivity foil facing dramatically improves thermal performance in sealed cavity air spaces, boosting the potential U-value even more. As you'd expect from Celotex, the GA4090 is manufactured to the highest industry standards. The BBA (British Board of Agrement) has approved it as fit for use in defined roof, wall and floor applications when installed, used and maintained according to the guidelines in the certificate. On top of that, the GA4100 has a BRE (Building Research Establishment) Green Guide Rating of A, which will help improve your environmental performance. Altogether, this PIR insulation board will provide reliable long-term energy savings for you and your home.

Features & Benefits: Celotex GA4100 100mm PIR Insulation Board - 2.4m x 1.2m

  • High-quality PIR insulation board
  • Reduced thickness & excellent thermal performance
  • Lightweight, quick & easy to install
  • Suitable for use in roof, wall and floor applications
  • Low emissivity foil facings for improved thermal insulation performance in cavity air spaces
  • BRE Green Guide Rating of A for sustainability
  • BBA certified
  • R-Value: 4.50m2K/W
  • Maximum weight: 4.15kg/m2
  • Compressive strength (kPa): CS(10\Y)140

Standards & Certification

  • Thermal conductivity: 0.022W/m.K, according to BS EN 13165 for factory made rigid polyurethane foam (PU) product
  • 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 2400mm Thickness 100mm Width 1200mm


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

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3 / 5 2 reviews
21st November 2021
Easy to work with.
Katie Lumley
23rd February 2020
Didn’t receive the goods
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Celotex GA4100 100mm PIR Insulation Board - 2.4m x 1.2m

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