Proposed Vapor Barrier Code Changes
Up one levelInformation about proposed vapor barrier code changes including discussions on wall designs, moisture balance, thermal characteristics, vapor permeance characteristics and recommendations by climate zone.
- BSD-106: Understanding Vapor Barriers by Joseph Lstiburek — last modified 2008/10/17
- The function of a vapor barrier is to retard the migration of water vapor. Where it is located in an assembly and its permeability is a function of climate, the characteristics of the materials that comprise the assembly and the interior conditions. Vapor barriers are not typically intended to retard the migration of air. That is the function of air barriers.
- RR-0410: Vapor Barriers and Wall Design by Building Science Corporation — last modified 2008/10/20
- Good design and practice involve controlling the wetting of building assemblies from both the exterior and interior and different climates require different approaches.
- RR-0401: Conditioned Crawl Space Construction, Performance and Codes by Building Science Corporation — last modified 2008/10/20
- This paper discusses the differences between vented, unvented and conditioned crawl spaces. Best practice construction techniques and assemblies for conditioned crawl spaces are discussed, the results of a field monitoring program are presented, and the code language addressing crawl spaces is explained.
