![]() ![]() This practice is helpful in selecting and installing vapor retarders under slabs to prevent unwanted migration of water vapor through the building envelope. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence.ĪSTM E1643 provides important requirements, which contractors and architects alike should consider when specifying and/or installing under-slab vapor retarder systems.Īrchitects and contractors alike use ASTM E1643 Standard Practice for Selection, Design, Installation, and Inspection of Water Vapor Retarders Used in Contact with Earth or Granular Fill Under Concrete Slabs. ![]() ![]() A Breakdown of the Four Sections Within ASTM E1643ĪSTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards.
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