ASTM C1136隔热用柔性,低渗透蒸气阻化剂的标准规范
日期:2012-02-13 21:22
tion needed for the insulation, can use this specification to specify the appropriate type of vapor retarder when one is required.
1. Scope
1.1 This specification covers vapor retarders for thermal insulation, specifically, flexible materials with permeance of 0.10 perm or lower and surface burning characteristics of 25 flame spread/50 smoke or lower. These materials are intended for use at surface temperatures of 20 to 150F (29 to 66C). It does not cover mastics or barrier coatings applied in l
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