What is ASTM E 1745?
A standard you should know about.ASTM E 1745-97 "Standard Specification for Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill under Concrete Slabs." is a standard that was written by a committee of ASTM chaired by Tom Butt an architect in Northern California.
Three performance classes are outlined A, B and C (with Class A being the best). Permeance levels are the same for each class. Tensile Strength and Puncture Resistance change with each class.
1745 refers to ASTM E 154-93 "Standard Test Methods for Water Vapor Retarders Used in Contact with Earth Under Concrete Slabs, On Walls or as Ground Cover." and to ASTM E 96-95 "Standard Test Methods for Water Vapor Transmission of Materials."
These standards outline the methodology whereby plastic vapor retarders are tested. Stego Industries LLC is the only company that provides you with independent laboratory test results for these ASTM standards, proving compliance.