scope:

These test methods² cover the determination of the properties of flexible membranes to be used as vapor retarders in contact with earth under concrete slabs, against walls, or as ground cover in crawl spaces. The test methods are applicable primarily to plastic films and other flexible sheets. The materials are not intended to be subjected to sustained hydrostatic pressure. The procedures simulate conditions to which vapor retarders may be subjected prior to and during installation, and in service.

The values stated in SI units are to be regarded as standard. The inch-pound values given in parentheses are provided for information only and are not considered standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

² Some of these test methods were based originally on Report No. 2040, U.S. Forest Products Laboratory, and "Vapor Barrier Materials for Use with Slab-On- Ground Construction and as Ground Covers in Crawl Spaces," Publication 445-1956, Building Research Advisory Board (currently out-of-print).