A vapor barrier is one of the foremost tools builders can use in their construction projects to protect the building from mold, mildew, and radon gas. A vapor barrier is a type of vapor retarder that is meant to prevent the build-up of moisture in building projects, most commonly used for under slab and crawl space encapsulation. Americover is the premier source for a wide range of vapor barrier options that meet state and federal codes, including ASTM.

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