Concrete Slab Plastic Sheeting

Can also be used as a vapor barrier under concrete slabs.

Concrete slab plastic sheeting.

Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders. Plastic sheeting is a general purpose plastic film for use in a variety of construction and diy projects. 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. A plastic polyethylene covering retains moisture in the concrete and improves temperature control.

The order upwards for the slab is. Advertisement do pond cure concrete slabs. 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. This plastic can be used to cover crawl spaces and as a temporary cover for equipment and supplies.

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. When temperatures are higher than 85 f reflective white colored sheets help to keep the concrete cool as it cures. Commonly used under concrete slabs as a vapor barrier and on top of freshly poured slabs as a curing blanket. If the temperature is below 60 f use dark colored plastic sheets to absorb more light and boost the temperature.

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. It used to be 4 mil thick and 6 mil thick polyethelene sheeting was sufficient but not anymore. 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. 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.

The correct thickness of concrete vapor barriers being placed under concrete slabs and floors has been debated for many years. This plastic sheet is in direct contact with the concrete as it should be in a rational world. True vapor barriers allow little water vapor to penetrate. 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.

Clear 4 mil plastic sheeting.