Vapor barrier

（重定向自Vapour 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	Vapour barrier
释义	Vapour barrier 英语百科 Vapor barrier （重定向自Vapour 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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