A prominent use of such barriers is to place them beneath a building to prevent gas and vapor intrusion. They are installed under new slabs during construction. When set correctly, they force soil gas ...

True vapor barriers should have a permeance rating ... Vapor Retarders Used in Contact with Earth or Granular Fill Under Concrete Slabs, ASTM International, www.astm.org. ASTM E 1745-09 Standard ...

The U.S. Army plans to install protective technology in homes to be built next to Fort Detrick’s Area B after determining there are significant potential health risks due to groundwater contamination ...