Moisture Intrusion & Potential Mold
Water that has entered a home because joints where not properly sealed is not visible to the eye until after the water damage has become extensive. Moisture penetration can also lead to mold and mildew problems. Because wet construction materials have different thermal patterns than dry, Infrared thermograms can show small amounts of moisture intrusion behind siding or inside walls and ceilings . Repairs can be initiated while the moisture problems are small and before the house become uninhabitable.
The U.S. Department of Energy Recommendations
Good Stucco Gone Bad!
Problems Lurking Behind Bad Stucco