Vapor Barrier Under Concrete Slab Viper II below-slab vapor barrier is the first line of defense against damaging water vapor and soil gas threats existing below the concrete slab. Viper II products are multi-layer (co-extruded), virgin polyolefin under-slab vapor barriers/retarders. The ...
Vapor barriers can’t be used alone in a wall assembly. An air gap along with the barrier is crucial. When warm air passes through walls, the moisture condenses out of it. This means that a vapor barrier needs to be placed on the warm side of the insulation to stop warm, moist air ...
The two vapor barriers make the slab easier to push into the water.Thanks Again!!---Andrew dik (visitor) 6 Apr 02 12:39 What are the possible consequences of not laying a vapor barrier prior to pouring a monolithic slab? What can be done to prevent any problems after the fact?