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. Cavity barriers are not required with non-combustible full fill insulation, minimising the risk of fire spreading through a cavity. BBA certified for use in all exposure zones, including those in very severe areas. Slabs are sized to fit between wall ties without the need for retaining discs.