Concrete Slab Plastic Sheeting

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Concrete slab plastic sheeting. 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. True vapor barriers allow little water vapor to penetrate. Commonly used under concrete slabs as a vapor barrier and on top of freshly poured slabs as a curing blanket.
Advertisement do pond cure concrete slabs. Undisturbed soil crushed stone 4 inches of type i eps 6 mil polyethelene sheet another 4 inches of type i eps and then the 4 inch concrete slab for a total insulation value of r30. When temperatures are higher than 85 f reflective white colored sheets help to keep the concrete cool as it cures. 6 mil plastic often gets damaged during placement of reinforcement and concrete creating holes that can let a considerable amount of water vapor into the slab.
Can also be used as a vapor barrier under concrete slabs. Commonly used under concrete slabs as a vapor barrier and on top of freshly poured slabs as a curing blanket. This plastic can be used to cover crawl spaces and as a temporary cover for equipment and supplies. This plastic sheet is in direct contact with the concrete as it should be in a rational world.
The order upwards for the slab is. It used to be 4 mil thick and 6 mil thick polyethelene sheeting was sufficient but not anymore. 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. This technique can also be used for upright concrete columns and walls by wetting them down and wrapping them with a curing blanket or plastic sheeting.
Plastic sheeting is a general purpose plastic film for use in a variety of construction and diy projects. The hdx 20 ft. The correct thickness of concrete vapor barriers being placed under concrete slabs and floors has been debated for many years. Polyethylene sheeting under concrete slab under slab vapor retarders play a very important role in retarding moisture from coming up through the concrete and into the structure.
Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders.