Meir Roofing

Has good compressive and laminar strength and a very low coefficient of thermal expansion is used as a low cost heat protection facing for insulation material, is a low cost overlay board for re-roofing and provides a satisfactory base for mastic asphalt waterproofing or fully bonded built-up roofing, but it is vulnerable to decay if it becomes damp and moisture absorption can cause significant movement and may cause ridging of the waterproofing over the joints.   It is no longer widely used as insulation because it has insufficient performance for modern requirements.