Uncontrolled water vapor through concrete slabs has cost building owners, designers and contractors billions of dollars. The use of underslab vapor barriers is the best method and most economical solution for controlling water vapor migration through concrete slabs. Vapor and gas barriers: critical building Protection.
Vapor barrier definition is – a layer of material (such as roofing paper or polyethylene film) used to retard or prevent the absorption of moisture into a construction (such as a wall or floor).
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Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions: the inner surface in colder climates and the outer surface in hot, humid climates. In existing spaces, oil-based paints or vapor-barrier latex paints offer an effective moisture barrier.
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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 the wall, floor, ceiling, or roof assemblies of buildings to prevent interstitial condensation and of packaging.
IJIRST –International Journal for Innovative Research in Science & Technology| Volume 2 | Issue 06 | November 2015 ISSN (online): 2349-6010
The function of a vapor barrier is to retard the migration of water vapor. Where it is located in an assembly and its permeability is a function of climate, the characteristics of the materials that comprise the assembly and the interior conditions.vapor barriers are not typically intended to retard the migration of air.