Moisture-Control Layers and Materials

Learning Objectives

1. Review how bulk water can enter the exterior wall assembly and cause structural concerns within the wall cavity.
2. Review how water vapor moves within a wall assembly. When dealing with water vapor, it is critical to choose the correct materials on both the inside and outside to allow the assembly to dry which will reduce the risk of mold.
3. Review control layer properties and discuss which products should be used where in residential construction.
4. We will look at a few assembly failures and review how the materials chosen could have played a role in the failure.