Important Information: For all updates and Celotex announcements since June 2017, please see the links below...  See more

Declared lambda values - Read more >

5000 Class 0 testing - Read more >

Rainscreen cladding & RS5000 - Read more >


Celotex PIR insulation boards provide proven solutions for all insulation applications: floor, wall, pitched and flat roofing and conversions.

U-value Calculator
Start your U-value calculation >
Use the calculator

Celotex products insulate countless buildings the length and breadth of the UK. Our solutions continue to make a difference not just by creating warmth and comfort but by saving energy too. Every day, thousands of professionals choose Celotex. For them, Celotex is insulation. Plus, all Celotex products come with a suite of practical online tools, as well as exceptional before and after sales service.