1.Scope 1.1.It is the intention of this practice to provide a practical means of mounting low permeance materials to allow for testing insulation systems, using these materials, for water vapor transmission following test procedure E-96. 1.2.For an insulation system to function successfully on a below ambient system in a humid environment, it must have both a low permeance and tightly sealed joints. This practice provides a means of testing those joints. 1.3.This practice recommends how to mount a low permeance material, in an E-96 test apparatus, so as to include joints between pieces of that material. It does not require changes to the E-96 test procedure itself. 1.4.Low permeance, thin sheet materials with both lap and taped joints are included, as are sealed butt joints using low permeability, cellular insulation materials. 1.5.Materials covered by this practice include, but are not limited to, those covered by specifications C1136, C552, and C534. 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