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Significance and Use
4.1 In many applications, the vapor retarders used on a thermal insulation will be exposed to the temperatures listed in . Cracking or delamination of the retarder under these conditions would, in most cases, cause it to lose its effectiveness as a vapor retarder material.
1.1 This test method covers the visual determination of the thermal integrity of flexible water vapor retarders for those materials classified under Specification , including plastic, foil, or paper and composites of two or more of these materials to temperatures listed in the specification or purchase contract. The vapor retarders are intended for use at temperatures of − 20 to 150°F (−29 to 66°C). This test method does not cover mastics or barrier coatings applied in liquid form or materials intended for use as weather barriers.
1.2 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.
1.3 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. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C168 Terminology Relating to Thermal Insulation
C1136 Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation
ICS Number Code 91.100.50 (Binders. Sealing materials)
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ASTM C1263-95(2015), Standard Test Method for Thermal Integrity of Flexible Water Vapor Retarders, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top