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Celotex TB4025 25mm PIR Insulation Board - 2.4m x 1.2m

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£17.94 Incl. VAT
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Celotex TB4025 is an easy-to-install multi-purpose polyisocyanurate (PIR) insulation board with excellent thermal performance. Featuring a low emissivity foil facing, it's ideal for various floor, wall and roof applications. The excellent thermal conductivity of 0.022 W/m.K reduces significantly the thickness of insulation required to meet the target U-value. In addition, the low emissivity foil facing boosts thermal performance in sealed cavity air spaces, further improving U-values.

But that's not all! Available in a size of 2400mm in length by 1200mm in width by 25mm in thickness, this versatile PIR insulation board is light and rigid, making it easy to handle and install. With a BRE (Building Research Establishment) Green Guide Rating of A, it's sustainably sourced and environmentally friendly. Last but not least, TB4025 is certified by the BBA (British Board of Agrement), so you know it's manufactured to the highest standards in the industry.

Features & Benefits: Celotex TB4025 25mm PIR Insulation Board - 2.4m x 1.2m

  • High-quality versatile PIR insulation board
  • Excellent thermal performance & reduced thickness
  • Low emissivity foil facing
  • Suitable for floor, roof and wall applications
  • Lightweight and easy to install
  • BRE Green Guide Rating of A for sustainability
  • BBA certified
  • R-Value: 1.10m2K/W
  • Maximum weight: 0.85kg/m2
  • Compressive strength (kPa): CS(10\Y)120

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 25mm Width 1200mm


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

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4.5 / 5 3 reviews
17th February
I have already done a review for this and it is good stuff.
Phillip Stevens
5th April 2020
Great price and service
Ron McGlone
6th March 2020
Wanted 20mm but not in stock accepted 25mm and all went well. Price was good
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Celotex TB4025 25mm PIR Insulation Board - 2.4m x 1.2m

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