Concrete Slab Vapour Barrier

If ground conditions require their use a 3 inch 75 millimeter layer of sand over the vapor barrier and under the concrete has been shown to reduce these problems.

Concrete slab vapour barrier.

Once this happens the flooring can buckle or warp and cause havoc. The term vapor barrier is often used interchangeably with the term vapor retarder to describe all membranes used to resist water vapor transmission. Many moisture problems associated with interior concrete floors and slabs on grade can be minimized or eliminated by installing a vapor barrier under the concrete. First a vapor barrier provides a consistent smooth surface for concrete placement teams.

A concrete vapor barrier is simply a sheet of polyethylene plastic visqueen placed directly on top of the sub grade before the concrete floor or slab is poured to help keep moisture from the soil from passing up through the concrete. Aci 302 1 guide for concrete floor and slab construction states that the minimum thickness of an effective vapor barrier is 10 mils. Thinner plastic can t stand up to the abuse of construction. Their use should be avoided where ground moisture conditions permit.

Vapor barriers aggravate the problems of plastic and shrinkage cracking. Uncontrolled water vapor through concrete slabs has cost building owners designers and contractors billions of dollars. It needs to dry and then stay dryto avoid flooring problems. Since concrete is porous water vapors transmits from the ground through the concrete slab into your basement.

Stego industries is the leader in the below slab concrete vapor barrier market. Furthermore placing concrete directly on the vapor barrier s consistent surface can make finishing of the slab more even. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. Vapor and gas barriers.

A vapour barrier is a 0 2mm thick plastic lining under a concrete ground slab. Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way. It prevents moisture from coming up through the slab ie rising damp. This can be a time saver where the placement team has a predictable surface on the site throughout.

A vapor barrier is an impermeable membrane primarily used to resist water vapor transmission from the soil to the concrete slab. This was verfied by some field studies conducted by concrete constructionmagazine.