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.

Unfortunately there is a downside to plastic as well. When temperatures are higher than 85 f reflective white colored sheets help to keep the concrete cool as it cures. The concrete will be discolored anywhere the plastic touches it. A plastic polyethylene covering retains moisture in the concrete and improves temperature control.

Visit us today for the widest range of building construction products. If not tent the plastic so it doesn t come into direct contact with the concrete. Commonly used under concrete slabs as a vapor barrier and on top of freshly poured slabs as a curing blanket. Check out our range of builders plastic products at your local bunnings warehouse.

The bigger the mil number the thicker the plastic. In the recent construction of our pre certified passivhaus in nj we did exactly what peter above described. 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. Condensed water pools wherever the plastic touches the.

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. If you plan on using an opaque stain on your concrete after it cures this doesn t matter. Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should. The order upwards for the slab is.

Under slab vapor retarders play a very important role in retarding moisture from coming up through the concrete and into the structure. Polyethylene sheeting under concrete slab. We encourage retail customers to use our click deliver or drive collect service. While plastic sheeting is highly effective in helping concrete cure without cracks there is a downside.

Joints are to be overlapped by not less than 200mm to ensure continuity and are continuously taped using 50mm duct tape. Thin plastic like this is often called a vapor retarder meaning it slows the vapor down but doesn t stop it. The hdx 20 ft. The sheet shall be placed on the sub base so the bottom surface of the concrete slab is entirely under laid by the film.

If the temperature is below 60 f use dark colored plastic sheets to absorb more light and boost the temperature. Covid 19 update to customers our metropolitan melbourne stores will remain open for trade customers only. This plastic can be used to cover crawl spaces and as a temporary cover for equipment and supplies.