VaporBlock G is an under-concrete-slab vapor barrier produced with a layer of post-consumer recycled content, qualifying under the LEED Building Design and Construction 2009 Edition, Materials and ...

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 ...