cavity barrier
[AIVC, Air infiltration and ventilation glossary, 1992]:
a form of vapour barrier where a moisture impervious layer is introduced inside the “cavity” of a cavity wall, usually polythene sheeting.(see vapour barrier; cavity wall)
[AIVC, Air infiltration and ventilation glossary, 1992]:
a form of vapour barrier where a moisture impervious layer is introduced inside the “cavity” of a cavity wall, usually polythene sheeting.(see vapour barrier; cavity wall)