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 timber frame separating (party) walls. Fully filling the party wall cavity contributes towards a zero effective U-value, simplifying compliance with building regulations. Suitable for use with a range of constructions registered in the Robust Details Handbook reducing the need for on-site acoustic testing.