Knauf Dritherm Cavity Slab 32 (455mm x 1200mm) 125mm is a high-performance glass mineral wool insulation solution designed for use in external cavity walls. This cavity slab offers excellent thermal efficiency, helping to reduce heat loss and improve energy savings in residential and commercial buildings. The non-combustible, water-repellent design ensures both safety and durability, while the convenient slab size allows for quick installation and a snug fit between wall ties. Manufactured to meet rigorous UK building standards, Knauf Dritherm Cavity Slab 32 is ideal for new builds or renovations where reliable insulation is required.