150mm Sopratherm XR4150 PIR Insulation Board (formerly Celotex XR4000) is a premium polyisocyanurate rigid insulation solution engineered for diverse building applications. Delivering a thermal conductivity of 0.022 W/mK, this board provides outstanding thermal resistance and helps minimise heat transfer whilst boosting building energy efficiency.
Manufactured by Soprema, the 150mm SOPRATHERM insulation boards feature aluminium foil facings that enhance thermal performance and function as an effective vapour control layer when properly installed.
SOPRATHERM XR4150 is supplied in thicknesses ranging from 20mm to 40mm and holds BBA certification for multiple construction applications, including:
SOPRATHERM 150mm boards suit numerous construction scenarios. As versatile multi-purpose insulation, they work across different applications and can be readily cut and fitted. Typical uses for 150mm SOPRATHERM include:
All applications listed are covered under BBA Certificate 25/7318, verifying product suitability for defined construction systems when installed per manufacturer specifications.
SOPRATHERM XR4150 achieves Euroclass F Reaction to Fire classification, tested to BS EN 13501-1 standards.
Under current UK Building Regulations on combustibility, this product cannot be used within external walls of relevant buildings exceeding 11 metres in height.
SOPRATHERM PIR insulation boards must be selected, fitted and detailed according to:
The manufacturer's installation instructions Proper specification and fitting ensures the insulation functions effectively within the building structure and satisfies all regulatory standards.
Explore our full Sopratherm Insulation product range. We deliver across the entire UK Mainland. To discuss product suitability for your project or request a bulk discount quotation, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.








