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APA J450

2009 Edition, February 2009

Complete Document

Technical Note: Water Vapor Permeance of Wood Structural Panels and Wood Wall Construction



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Product Details:

  • Revision: 2009 Edition, February 2009
  • Published Date: February 2009
  • Status: Active, Most Current
  • Document Language: English
  • Published By: APA - The Engineered Wood Association (APA)
  • Page Count: 0
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

Because moisture vapor can move through exterior wall systems, care must be taken with respect to the design of the wall to prevent excessive condensation and minimize moisture-related problems. This document addresses the water vapor permeance of structural wood panels, vapor retarders and their role in wall-system design