125mm Knauf DriTherm Cavity Wall Insulation Slab 32 (2.18m2/Pack)

Full-fill glass mineral wool insulation slab, measuring 125mm in thickness, for use in masonry cavity walls.Manufactured with a high recycled glass content and ECOSE® Technology, it delivers advanced thermal insulation while remaining vapour permeable, helping the wall construction to breathe.With a thermal conductivity of 0.032 W/mK, it provides superior energy efficiency, enabling lower U-values to be achieved at reduced insulation thicknesses.Rated Euroclass A1 non-combustible and fully BBA certified for all UK exposure zones, it ensures proven fire safety, durability, and long-term reliability.At 125mm thick, the slab is designed for wider cavity walls in new build housing, offering a higher level of thermal performance than mid-range options such as 100mm. This increased depth helps achieve lower U-values in line with stricter energy efficiency targets, while still allowing full-fill installation in a single layer.