1.1The standard practice provides instruction for the preparation of test specimens of pressure sensitive adhesive (psa) sealed joints of the type employed in insulation vapor retarder systems, for subsequent testing per Test Method E96 to determine the water vapor permeance (permeance) of those joints. It does not cover preparation of other types of joints. 1.2This practice also provides requirements for the content of reports issued in conjunction with Test Method E96 testing of these joints. 1.3Joints are made with factory coated psa tapes or psa coated laminate jacket (vapor retarder cladding) materials. 1.3.1 The types of materials and joints to be tested are generally encountered in mechanical systems in commercial and industrial insulation applications, and in HVAC systems insulation. 1.3.2 Typical psa joints that are employed in vapor retarder systems for mechanical insulation include: 126.96.36.199 Overlap with double-sided tape 188.8.131.52 Overlap with coated laminate jacket 184.108.40.206 Butt with single-sided insulation tape 220.127.116.11 Intersection of overlap and butt joint 1.4 Test Method E96 is to be followed for specific testing instruction beyond the areas of guidance provided herein, i.e., after the specimens are prepared in the desired test configuration. 1.5 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. 1.6.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.
Currently, there is no standardized method for testing low permeance materials, with joints, for water vapor transmission in Test Method E-96. This standard fills a missing link in the evaluation, design, and implementation of low permeance insulation systems.
Keywordsvapor retarders, vapor barriers, closures
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top