Vapor barrier

6 mil Polyethylene plastic sheet as vapour barrier between insulation and gypsum board

Glass wool pipe insulation covering a steel pipe as it penetrates a mock-up concrete slab whose opening will be firestopped. In this manner, the vapor barrier (in this case made of foil scrim kraft paper, called ASJ, All Service Jacket, aluminium on the inside, white paper on the outside) can remain intact as it penetrates the fire barrier.

Vapor barrier location by geographical location

A vapor barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists diffusion of moisture through wall, ceiling and floor assemblies of buildings to prevent interstitial condensation and of packaging. Technically, many of these materials are only vapor retarders as they have varying degrees of permeability.

单词	Vapor barrier
释义	Vapor barrier 原声例句奇思妙想科学站 So if you dipped your hand inside liquid nitrogen, a vapor barrier would immediately form that protected your hand from freezing. 因此，如果您将手浸入液氮中，会立即形成防潮层，保护您的手免于冻结。英语百科 Vapor barrier A vapor barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists diffusion of moisture through wall, ceiling and floor assemblies of buildings to prevent interstitial condensation and of packaging. Technically, many of these materials are only vapor retarders as they have varying degrees of permeability.
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