Vapor Permeance: Classification
Class I: Materials that have a permeance of 0.1 perm or less.
Note: this is also the definition of a "vapor barrier".
Class II: Materials that have a permeance of 1.0 perm or less and greater than 0.1 perm.
Note: This is the definition of a "vapor
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green builder, or green remodeler
in North Central Texas
or the Dallas-Fort Worth area?
Contact Terry Jensen
Frugal Energy, LLC
972 251-1532 or 817 443-2553
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