Wednesday, April 13, 2016; 11:00 AM - 12:00 PM Eastern
This is the second part of a two-part webinar series on water vapor permeance. The first webinar defined permeance. This webinar discusses why it matters. The permeance of the paint system applied to a building can affect the performance of the entire wall assembly. The same system that successfully protects a building in Rhode Island could lead to the formation of condensation within the walls in Miami, Florida. This webinar presents the results of thermo-dynamic modeling that was undertaken using WUFI-ORNL/IBP software. A comparison of different scenarios will be presented illustrating the results that the permeance of interior/exterior coating systems can have on the performance of the wall assembly in buildings located in different climate zones.
1) Recognize the differences in “vapor drive” and “water-vapor permeance of coatings” in building wall assemblies.
2) Identify differences in the performance of a building wall assembly when an impermeable, semi-permeable, and permeable system is used on the exterior and interior surface.
3) Identify differences in the performance of identical building wall assemblies located in different climate zones.
4) Recognize the value in using WUFI in making judgements on coating selection.