Cementitious tanking materials are used for basement tanking when there is a requirement to block water ingress into the building. After preparing the surface, the basement tanking slurry is applied to the masonry surface in two to three coats depending on the volume of water ingress. The basement tanking slurry then cures to form a water impermeable surface which should then be covered with a render to protect it. By using this basement tanking method the basement remains completely waterproof and the walls remain dry and breathable.
Cavity Drained Membranes are designed to control the passage of water using cavity forming membranes, drainage channels and sump and pump water evacuation systems. Some membranes have a mesh welded on the face for direct rendering or for fixing dot and dab plasterboard systems. Other membranes are plain, designed for flooring or where a wall is to have a dry-lining finish.