Vapor barrier

vapor barrier

[′vā·pər ‚bar·ē·ər] (civil engineering) A layer of material applied to the inner (warm) surface of a concrete wall or floor to prevent absorption and condensation of moisture.

Vapor barrier

Airtight skin of polyethylene of aluminum that prevents moisture from warm damp air in a building from passing into a colder space, causing condensation.

vapor barrier

vapor barrier SeeVapor retarder.