Plastic Under Concrete Slab

Vapor barriers under concrete floor slabs.

Plastic under concrete slab.

Visit us today for the widest range of building construction products. This plastic sheet is in direct contact with the concrete as it should be in a rational world. 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.

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. Covid 19 update to customers our metropolitan melbourne stores will remain open for trade customers only. 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. 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.

Thin plastic like this is often called a vapor retarder meaning it slows the vapor down but doesn t stop it. 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. 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. Aci standard 302 1 r 96 guide for concrete floor and slab construction included this recommendation in section 4 1 5.

Check out our range of builders plastic products at your local bunnings warehouse. 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.