Plastic Under Concrete Slab

Why a plastic vapor barrier under concrete slab mondays withinstall the proper type of vapor barrier siouxland homesare vapor ers necessary for bats and garagesvapour barrier under concrete.

Plastic under concrete slab.

This plastic sheet is in direct contact with the concrete as it should be in a rational world. Thin plastic like this is often called a vapor retarder meaning it slows the vapor down but doesn t stop it. We encourage retail customers to use our click deliver or drive collect service. Check out our range of builders plastic products at your local bunnings warehouse.

If a vapor barrier or retarder is required. The black plastic sheet that the reinforcement is sitting on is the vapor barrier. A much better approach is a true vapor barrier with characteristics that conform to the requirements of astm e 1745 standard specification for water vapor retarders used in contact with soil or granular fill under concrete slabs. Waffle slabs require vapour barriers too and here are some photos that show a few waffle slabs with vapour barriers again before the concrete is poured.

Visit us today for the widest range of building construction products. Florprufe vapor barriers gcp lied concrete vapor barriers the pros vapor barrier under concrete slab vapour barrier concrete floor problems building concrete vapor barrier what is a. Beginning in 1989 the american concrete institute aci recommended the installation of a 4 inch layer of granular material between a sub slab vapor retarder and a concrete slab. Almost everywhere except california that slabs are placed on the ground a plastic sheet a vapor barrier is located directly under the concrete slab and on top of the ground photograph 1.

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. By steve ragan director research and technical services the answer to this controversial question from both angles is a qualified yes vapor barriers have been associated with certain concrete slab on grade problems including curling and cracking.