An A1 Non-Combustible Glass Mineral Wool slab, manufactured using Knauf Insulation’s unique ECOSE® Technology, and is specifically designed for use as full fill insulation in masonry cavity walls. Manufactured in high-density glass mineral wool For use with thermal insulation in external masonry cavity walls Thermal conductivity of 0.037 W/mK Non-combustible Suitable for all exposure zones Thermal resistant floorboard