Insulation DriTherm 32 Cavity Insulation Slab 150mm 1200mm x 455mmEnhance the insulation of your masonry cavity walls with Insulations DriTherm Cavity Slab 150. This high performance insulation solution is designed for use in all exposure zones, including very severe conditions, thanks to its BBA Agrement certification. Engineered with a water repellent additive, it effectively resists moisture ingress, ensuring long term thermal performance. The DriTherm Cavity Slab 150 fits frictionally between wall ties,