Dritherm Cavity Slab 32 100mm 455 x 1200mm 3.276m2 Per PackUpgrade your building's insulation with Insulation's DriTherm Cavity Slab 32. Designed to provide superior thermal performance, this insulation slab is ideal for masonry cavity walls and meets all rigorous standards. With its Agrement certification by the BBA, it is suitable for use in all exposure zones, including the most severe environments. Engineered to fit frictionally between wall ties, it eliminates the need for additional products like