Celotex

Celotex is the UK’s leading manufacturer of high performance PIR  (polyisocyanurate) insulation boards. Celotex PIR has excellent thermal performance with lambda values of 0.022W/mK, which means the thickness of insulation required to meet the appropriate U-value is reduced (U-value refers to the rate of transfer of heat through a structure. The better insulated a structure is, the lower the U-value). This optimises space in construction design as there is no need for bulky insulation.