When plastic sheeting or curing blankets are placed atop a concrete slab much of the blanket is in direct contact with the concrete but there are also wrinkles and air pockets where the plastic remains suspended just above the slab.
Plastic sheeting for concrete slab.
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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.
The correct thickness of concrete vapor barriers being placed under concrete slabs and floors has been debated for many years.
Vapor retarders have been used since the 1950s.
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.
If possible use sheets that incorporate glass fibers for reinforcement.
This plastic can be used to cover crawl spaces and as a temporary cover for equipment and supplies.
The hdx 20 ft.
It used to be 4 mil thick and 6 mil thick polyethelene sheeting was sufficient but not anymore.
Concrete contractors learned that a layer of poly helps to keep a slab dry because it stops upward vapor diffusion from the soil.
Plastic sheeting is a general purpose plastic film for use in a variety of construction and diy projects.
The best way to accomplish that is with a vapor barrier under the slab.
Plastic sheets should be thick at least four thousandths of an inch.
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.
Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders.
Condensed water pools wherever the plastic touches the slab but the concrete under the air pockets remains dry.
This plastic can be used to cover crawl spaces and as a temporary cover for equipment and supplies.
Commonly used under concrete slabs as a vapor barrier and on top of freshly poured slabs as a curing blanket.
Eventually polyethylene was invented.
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.