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Celotex  |  SKU: XR4120

120mm Celotex XR4120 PIR Insulation Board - 2400mm x 1200mm

£36.46 Ex VAT
£43.75 Inc VAT

Celotex XR4120 is a larger PIR insulation board designed to give effective thermal insulation to roofs, walls and flooring.

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120mm Celotex XR4120 is a versatile multi-purpose insulation board. It is suitable for all sorts of applications including pitched roofs, flat roofs, solid floors and masonry walls and steel framed and timber framed systems. It is easy to handle, cut and shape. This high-performance insulation board delivers outstanding thermal performance. It meets the required U-value even though it's thinner than most similar products on the market.
  • Can be used in floor, roof and wall applications.
  • Low emissivity foil facings for improved thermal insulation performance in cavity air spaces.
  • Excellent thermal performance & reduced thickness.
  • Lightweight, rigid and easy to install.
  • BBA certified.
  • BRE Green Guide Rating of A for sustainability.

The innovative low emissivity foil facing improves thermal performance in sealed cavity air spaces and boosts the potential U-value. The XR4120 has been designed to the highest industry standards, with a BBA (British Board of Agrement) seal of approval as fit for use in defined roof, wall and floor applications when installed, used and maintained according to the guidelines in the certificate.

The XR4120 has a BRE (Building Research Establishment) Green Guide Rating of A, which will help improve your environmental performance. All in all, this PIR insulation board will provide substantial long-term energy savings for your home.

Thickness: 120 mm
Length: 2400 mm
Width: 1200 mm
Coverage: 2.88 m²
R-value: 5.45 m²K/W
Thermal conductivity: 0.022 W/mK
Certification: BA 16/5352 BBA  17/5405
Country Origin: UK


The R-value denotes the resistance to heat flow – the higher the R-value the more insulating the product is.

  • Size
    2400mm x 1200mm
  • Coverage (m²)
    2.88
  • Thickness
    120mm
  • Material
    PIR

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