Starting with lower water cement ratio concrete will let the slab dry faster.
Polythene sheet for concrete slab.
However this list is a summary of current applications.
Vapor barriers also block gases such as methane or radon.
This is because polyethylene allows the passage of oxygen and carbon dioxide.
Today most experts feel very strongly that engineered films designed specifically for use as vapor retarders should be used as vapor retarders.
A vapour barrier in concrete slabs full basements and crawl space construction.
Keep w c at or below 0 5.
These products are made.
Typical 8 mil polyethylene sheeting costs 5 to 7 cents per square foot.
Polyethylene sheeting under concrete slab.
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.
The order upwards for the slab is.
Radon is the second leading cause of lung cancer in the u s according to the american lung association.
As polyethylene is a relatively new plastic scientists are busily exploring and developing new applications for the products.
Under slab vapor retarders play a very important role in retarding moisture from coming up through the concrete and into the structure.