The most pervasive problem of exterior wall systems is moisture infiltration. No matter what type of system or material is applied, exterior building leaks are the most frequent complaints of building occupants. This is understandable since the primary function of a structure is to protect from the elements. Corrective actions can be employed at these components to prevent moisture infiltration into the facility.
Persistent water stains contribute to mold and mildew growth, which typically forms on interior materials through long-term exposure. Moisture infiltration at insulated cavity walls will decrease the insulation's thermal and structural integrity. Insulation-once wet-never completely dries out. The loss of insulating value will result in higher energy costs.