UNILIN PIR insulation board with multilayer facer with a thickness of 80 mm (± 10 mm). The insulation board has commercial names depending on the application: e.g. UTHERM WALL (or KD) in masonry cavity walls, for interior and exterior insulation of walls and in timber frame construction. UTHERM FLOOR (or FBO) is used in floors, UTHERM ROOF (or FD) on flat roofs, and UTHERM SARKING (or SD) on pitched roofs and UTHERM Premium, which is a variant of the normal foam that can be used in all above mentioned applications.