Concrete Slab Plastic Sheeting

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.

Concrete slab plastic sheeting.

Joints are to be overlapped by not less than 200mm to ensure continuity and are continuously taped using 50mm duct tape. A plastic polyethylene covering retains moisture in the concrete and improves temperature control. Condensed water pools wherever the plastic touches the. We encourage retail customers to use our click deliver or drive collect service.

The hdx 20 ft. Unfortunately there is a downside to plastic as well. Commonly used under concrete slabs as a vapor barrier and on top of freshly poured slabs as a curing blanket. When temperatures are higher than 85 f reflective white colored sheets help to keep the concrete cool as it cures.

Care is to be taken to ensure any penetrations by pipes or. 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. Polyethylene sheeting under concrete slab. The bigger the mil number the thicker the plastic.

Covid 19 update to customers our metropolitan melbourne stores will remain open for trade customers only. Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should. In the recent construction of our pre certified passivhaus in nj we did exactly what peter above described. The sheet shall be placed on the sub base so the bottom surface of the concrete slab is entirely under laid by the film.

Under slab vapor retarders play a very important role in retarding moisture from coming up through the concrete and into the structure. Visit us today for the widest range of building construction products. 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. While plastic sheeting is highly effective in helping concrete cure without cracks there is a downside.

Thin plastic like this is often called a vapor retarder meaning it slows the vapor down but doesn t stop it. If not tent the plastic so it doesn t come into direct contact with the concrete. If you plan on using an opaque stain on your concrete after it cures this doesn t matter. Plastic sheeting is a general purpose plastic film for use in a variety of construction and diy projects.

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. This plastic can be used to cover crawl spaces and as a temporary cover for equipment and supplies. Check out our range of builders plastic products at your local bunnings warehouse.