50mm SOPRATHERM GA4050 PIR Insulation Board (formerly Celotex GA4000) is a rigid polyisocyanurate (PIR) insulation solution engineered for diverse building applications. Featuring a thermal conductivity of 0.022 W/mK, this high-performance board delivers superior thermal efficiency and helps minimise heat loss whilst enhancing overall building energy performance.
Manufactured by Soprema, the 50mm SOPRATHERM insulation boards incorporate aluminium foil facings on both sides, which optimise thermal performance and function as an effective vapour control layer when properly installed.
The SOPRATHERM GA4050 range is available in thicknesses from 20mm to 40mm and holds BBA certification for multiple applications, including:
The 50mm SOPRATHERM board is a versatile, multi-purpose insulation solution suitable for numerous construction scenarios. These rigid boards are straightforward to cut and fit on site. Common applications for the 50mm Soprema product include:
These applications fall within the scope of BBA Certificate 25/7318, which validates the product's performance in specified construction systems when installed according to manufacturer's instructions.
The SOPRATHERM GA4050 achieves a Reaction to Fire classification of Euroclass F, as determined by testing to BS EN 13501-1.
Under current UK Building Regulations on combustibility, this product cannot be used in the external walls of relevant buildings exceeding 11 metres in height.
SOPRATHERM PIR insulation boards must be specified, installed and detailed in accordance with:
Proper specification and installation ensures optimal insulation performance within the building envelope and full compliance with regulatory standards.
Explore our full range of Sopratherm insulation products. We deliver across the entire UK Mainland. For advice on product suitability for your project or to request a quantity discount quotation, contact us by phone on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use our Live Chat service.








