Celotex PIR Insulation (now Sopratherm)

Celotex PIR insulation boards at trade prices. Celotex is now owned by Soprema and the range has been renamed Sopratherm (you may also see it searched for as Sopretherm or Supertherm): Celotex GA4000 is now Sopratherm GA4000, XR4000 is now Sopratherm XR4000, TB4000 is now Sopratherm TB4000 and PL4000 is now Sopratherm PL4000. The boards and codes are the same, so a 100mm Celotex GA4100 is a Sopratherm GA4100. Prices are ex VAT.

Celotex (Sopratherm) boards we stock

  • Celotex TB4000 – thin PIR board for thermal bridging, window reveals and dry lining; 20, 25, 30 and 40mm.
  • Celotex GA4000 – general-purpose PIR board for pitched roofs, floors and walls; 50 to 100mm.
  • Celotex XR4000 – thicker PIR board for low U-values in a single layer; 120 and 150mm.
  • Celotex PL4000 – PIR insulated plasterboard for dry lining walls; 37.5 to 77.5mm.

All the boards are 2400 × 1200mm (2.88m² per sheet) with a declared thermal conductivity of 0.022 W/mK. Work out how many you need with our insulation calculator or check a build-up with the PIR U-value calculator.

Free delivery to England & Wales on every order; minimum order £400 + VAT. Questions? Call 03330 908479 or email sales@insulationwarehousedirect.co.uk.

17 products

Celotex embraces environmental responsibility with products that contribute to reducing the carbon footprint of buildings. With low ozone depletion and superb energy efficiency, these insulation boards embody modern sustainability practices.

With decades of expertise, Celotex has become a leader in innovation and sustainability for insulation solutions. Backed by trusted certifications and tested against applicable standards, you can rely on Celotex products to perform under any condition.

Whether your project involves small residential renovations or large-scale commercial builds, Celotex offers insulation solutions that stand out for their high quality, consistent performance, and unparalleled value.