Moisture Vapor Barrier For Concrete

Below grade walls and floor slabs transmit ground moisture through concrete walls or slabs.

Moisture vapor barrier for concrete.

Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way. Vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking. Perminator vapor barriers help reduce the penetration of moisture and water vapor through the slab and into the building which helps reduce mold fungus and mildew. Meadows makes a concrete vapor barrier called perminator.

Aci 302 2r 06 guide for concrete floors that receive moisture sensitive flooring materials estimates that concrete with a w c of 0 5 will dry to an mver of 3 pounds 1000 sq. A vapor barrier against the concrete surface is generally recommended before wood framing or flooring materials are installed. But they have also proven to be beneficial in reducing failures of moisture sensitive flooring materials adhesives and coatings caused by excessive emission of moisture vapor from concrete slabs. When you read in a sealer data sheet that the mver needs to be 3 pounds or 5 pounds what that means is the number of pounds of water vapor per 1000 square feet per 24 hours.

Perminator also helps reduce radon gases from entering a building through. Meadows 10 and 15 mil vapor barrier. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. What is a concrete vapor barrier.

Water vapor leaves the surface of a concrete slab at a rate that is called the moisture vapor emission rate mver. Very hot and humid climates may benefit from an exterior vapor barrier that keeps outside humidity from penetrating into walls.