Moisture Vapor Barrier For Concrete

Very hot and humid climates may benefit from an exterior vapor barrier that keeps outside humidity from penetrating into walls.

Moisture vapor barrier for concrete.

A vapor barrier against the concrete surface is generally recommended before wood framing or flooring materials are installed. Below grade walls and floor slabs transmit ground moisture through concrete walls or slabs. Ft 24 hours in 82 days with a vapor barrier compared to 144 days when exposed to vapor from below. What is a concrete vapor barrier.

Vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking. Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way. 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. It needs to dry and then stay dry to avoid flooring problems.

Perminator also helps reduce radon gases from entering a building through. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. 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. Water vapor leaves the surface of a concrete slab at a rate that is called the moisture vapor emission rate mver.

Meadows makes a concrete vapor barrier called perminator. 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.