50mm Knauf DriTherm Cavity Wall Insulation Slab 37 (6.55m2/Pack)

Full-fill glass mineral wool insulation slab, measuring 50mm in thickness, for use in masonry cavity walls.Produced with a high recycled glass content and ECOSE® Technology, it delivers strong thermal insulation while allowing vapour to pass through, supporting a healthier building fabric.A thermal conductivity of 0.035 W/mK ensures effective energy efficiency, reducing heat loss and supporting compliance with modern Building Regulations.With a Euroclass A1 non-combustible rating and full BBA certification for every UK exposure zone, it also delivers confidence in fire protection, durability, and performance over time.At 50mm thick, the slab is suited to narrow cavity widths often found in older properties and refurbishment projects, offering a practical insulation solution where space is restricted while still delivering reliable thermal and acoustic performance.