<div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.1</span>&#x00a0;This specification covers flexible, preformed sheet membrane materials to be used as vapor retarders in contact with soil or granular fill under concrete slabs.

<div class="SectionLevel3"> <p class="subsec2 cdone2"><span class="Head4 cdone">1.1.1</span>&#x00a0;This specification does not cover bituminous vapor retarders. See Specification <span class="Body-link1 cdone">E1993/E1993M</span> for information on bituminous vapor retarders.

</div></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.2</span>&#x00a0;The specified tests are conducted on new materials and materials that have been conditioned or exposed to simulate potential service conditions.

</div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.3</span>&#x00a0;The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

</div> <div class="SectionLevel2"> <p class="WTOcaveat cdone2"><span class="Head3 cdone">1.4</span>&#x00a0;This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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