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Celotex XR4000 PIR Insulation Boards


Celotex XR4000 is an easy to install polyisocyanurate (PIR) insulation board with excellent thermal performance, featuring a low emissivity foil facing. Available in thicknesses from 110mm to 200mm, it can be considered for roof, wall and floor applications.

Product Features
  • Lightweight 2400 x 1200mm boards
  • Low emissivity foil facing
  • BBA certified – certificate 17/5405 (Pitched Roof, Dry Lining, Floor Insulation)
Fire Classification

Euroclass F 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.

Product Benefits
  • Thermal Performance – Excellent thermal performance with a thermal conductivity of 0.022 W/m.K, reducing the thickness of insulation required to hit the target U-value.
  • High Performance Facer – Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value.
  • Easy to Install – Celotex boards are light and rigid assisting with ease of transportation, handling and fitting.
  • BBA Certified – Celotex TB4000,GA4000 and XR4000 has been assessed by the BBA as fit for use in defined roof, wall and floor applications if installed, used and maintained as set out in the certificate. Please read the certification at insulation-UK.com/BBA; for full details and restrictions.


We offer a full range of Celotex XR4000 Insulation Boards here at Pinks Insulation, hey come in the below thicknesses

110mm, 120mm, 130mm, 140mm, 150mm

Additional information


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Lambda Value (W/m.K)

R-Value (m².K/W)

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Thickness (mm) Length (mm) Width (mm) Lambda Value (W/m.K) R-Value (m².K/W)
110 2400 1200 0.022 5.00
120 2400 1200 0.022 5.45
130 2400 1200 0.022 5.90
140 2400 1200 0.022 6.35
150 2400 1200 0.022 6.80


Celotex XR4000 Product Datasheet

From: £46.92

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