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Celotex GA4080 General Purpose PIR Insulation Board - 2400 X 1200 X 80mm

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A high-performance multi-purpose insulation board, Celotex GA4080 is suitable for a huge number of applications, including flat roofs, pitched roofs, solid floors and masonry walls, timber framed and steel framed systems and more. It's made of rigid polyisocyanurate (PIR) and is easy to handle, cut and shape, making it a convenient solution. This extremely versatile insulation board has impressive thermal conductivity of 0.022 W/m.K, which provides excellent thermal performance. As a result, it can easily meet the necessary U-value while being thinner than most similar products on the market.

What's more, the innovative low emissivity foil facing substantially improves thermal performance in sealed cavity air spaces, helping boost the potential U-value. The GA4080 is designed to the highest standards in the industry, and 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 as described in the certificate. Additionally, the GA4080 has a BRE (Building Research Establishment) Green Guide Rating of A, which will improve your environmental performance. Apart from everything else, it will provide reliable long-term energy savings for your home.

Features & Benefits: Celotex GA4080 General Purpose PIR Insulation Board - 2400 X 1200 X 80mm

  • High-quality PIR insulation board
  • Outstanding thermal performance & reduced thickness
  • Lightweight, quick & easy to install
  • Suitable for 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

Product Specification

  • Length: 2400mm
  • Width: 1200mm
  • Thickness: 80mm
  • Coverage: 2.88m2
  • R-Value: 3.60m2K/W
  • Maximum weight: 2.96kg/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)140
  • 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 80mm Width 1200mm


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

Questions & Answers


Can you use this for insulation under a concrete floor slab?


Yes this can be used under a concrete floor slab. A damp proof membrane (DPM) is laid first, followed by the insulation, a polythene vapour control layer (VCL), then the concrete slab. 

Have a question about this product?


5 / 5 2 reviews
Stephen Parrett
12th October 2020
Excellent service, price & quality
David Gibbons
7th August 2020
Really thick insulation and easy to work with. Used in between studs in n wall separating garage into office
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Celotex GA4080 General Purpose PIR Insulation Board - 2400 X 1200 X 80mm

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