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Celotex XR4120 High Performance Insulation Board - 2.4m x 1.2m x 120mm

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£66.92 Incl. VAT
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Celotex XR4120 is a highly versatile multi-purpose insulation board ideal for various applications including pitched roofs, flat roofs, solid floors and masonry walls and steel framed and timber framed systems. Made of sturdy polyisocyanurate (PIR), it's easy to handle, cut and shape. This convenient high-performance insulation board has excellent thermal performance and an impressive thermal conductivity of 0.022 W/m.K. Knowing that, you won't be surprised to learn that it easily meets the required U-value while also being thinner than most similar products on the market.

But wait - there's more! The low emissivity foil facing improves thermal performance in sealed cavity air spaces and boosts the potential U-value. The XR4120 is produced to the highest manufacturing standards and has a BBA (British Board of Agrement) certificate as fit for use in defined roof, wall and floor applications when installed, used and maintained according to the guidelines. Additionally, the board has a BRE (Building Research Establishment) Green Guide Rating of A, which will assist you in improving your environmental performance. Altogether, this PIR insulation board will provide reliable long-term energy savings for your home.

Features & Benefits: Celotex XR4120 High Performance Insulation Board - 2.4m x 1.2m x 120mm

  • Top-quality PIR insulation board
  • Excellent thermal performance
  • 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
  • BBA certified

Product Specification

  • Length: 2400mm
  • Width: 1200mm
  • Thickness: 120mm
  • Coverage: 2.88m2
  • R-Value: 5.45m2K/W
  • Maximum weight: 4.93kg/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 120mm Width 1200mm


Material PIR Product Type Board Facing Foil Edging Square Edge

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5 / 5 1 reviews
phil goodwin
20th February
No problems, delivery on time with a very helpful delivery driver (who was brilliant)
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Celotex XR4120 High Performance Insulation Board - 2.4m x 1.2m x 120mm

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