AC342 Vapor Permeable Membrane Used with Concealed Attics and Roof Spaces—Approved May 2008 (PDF Download)

Item #: AC342
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AC342 establishes guidelines for evaluation of vapor permeable membrane (VPM) used to form an air space below roof sheathing. The purpose of the membrane is to reduce air movement in the attic space, in order to control moisture vapor.

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AC342 establishes guidelines for evaluation of vapor permeable membrane (VPM) used to form an air space below roof sheathing. The purpose of the membrane is to reduce air movement in the attic space, in order to control moisture vapor.

Pages 3
Code Year - Other -
Publisher ICC-ES
Language English
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