Vapor retarders play an important role in controlling water vapor flow and can be a major element in durable building enclosure design. Experience shows that water vapor movement through building enclosure systems can result in problems in any climate— not just cold climates—where there is a difference in moisture levels between the interior and exterior.
After reading this article, you should be able to:
+ UNDERSTAND the basic physical forces that result in water vapor migration.
+ SELECT appropriate vapor retarder systems based on interior/exterior climate and general building enclosure construction parameters.
+ LIST the major factors that can impact water vapor migration through building enclosure systems.
+ DESCRIBE one or more ways to design durable, reliable, and effective building enclosure systems that appropriately manage water vapor.