Gas and vapor barriers, also known as membranes, consist of materials or structures used to prevent gas and other vapors from penetrating a surface. A prominent use of such barriers is to place them ...

The barrier can be a paint, spray, or foam that comes in various materials. Membrane/Sheeting The membrane/sheeting form of vapor barrier is a solid, flexible material designed for building wraps, ...

Vapor barriers are a crucial part ... Cover any outside air vents or skip them in new construction. Inside a crawl space, ...