Earthwool FactoryClad Insulation Roll 40 by Knauf is a high-density roll providing a premium level of thermal performance. Manufactured with glass mineral wool, it is 1200mm wide and is commonly used with rail and bracket spacings. Provides thermal and acoustic insulation of roofs and walls. It provides coverage of 16.92m2. Non-combustible Thermal conductivity of 0.040 W/mK Superior thermal performance Lightweight for ease of installation Can also be used for metal cladding wall and roof