Can CavityTherm be used in all regions?
CavityTherm can be used in any exposure zone. However, the use of the product does not preclude the need to apply an external render coat or other suitable finish in severe or very severe exposure zones where such application would be normal practice. Tests by the BBA confirm that constructions built in accordance with BS 5628-3 : 2005 can resist rain penetration. Water penetrating the outer leaf of the wall, will drain down the cavity face of the outer leaf and the product will contribute to satisfying the national Building Regulations: England and Wales – Requirement C2(b) There are no restrictions on CavityTherm over and above standard full fill materials.
