90mm SOPRATHERM GA4090 PIR Insulation Board (formerly Celotex GA4000) is a high-performance polyisocyanurate rigid insulation solution engineered for diverse building applications. Delivering a thermal conductivity of 0.022 W/mK, this board provides superior thermal resistance whilst minimising heat transfer and enhancing overall building energy efficiency.
The 90mm Soprema SOPRATHERM insulation boards feature aluminium foil facings on both sides, which boost thermal performance and function as an effective vapour control layer when properly fitted.
90mm SOPRATHERM GA4090 is supplied in thicknesses ranging from 20mm to 40mm and holds BBA certification for multiple construction applications, including:
90mm SOPRATHERM boards suit numerous building applications. As versatile multi-purpose boards, they accommodate various installation scenarios and are straightforward to cut and position. Common 90mm SOPRATHERM applications include:
These applications are covered under BBA Certificate 25/7318, confirming the product's suitability for use in defined construction systems when installed in accordance with the manufacturer's guidelines.
SOPRATHERM GA4090 achieves a Reaction to Fire classification of Euroclass F, tested in accordance with BS EN 13501-1.
Under current UK Building Regulations regarding combustibility, this product must not be used within the external walls of relevant buildings over 11 metres in height.
SOPRATHERM PIR insulation boards must be specified, installed and detailed in accordance with:
Proper specification and installation ensures the insulation performs effectively within the building fabric and meets all regulatory requirements.
Browse our full range of Sopratherm insulation products. We deliver across the entire UK Mainland. For project suitability advice or bulk quotations, contact us on 02039519012 / 02038839057, email sales@insulationbee.co.uk or use Live Chat - Lowest UK Insulation Prices near me.








