Both synthetic (EIFS) stucco and conventional stucco function as water barriers – meaning that, while they do repel some water, they can also absorb moisture and water, and prevent it from escaping, if the stucco is not properly built for drainage.
This can cause a variety of different problems in moist climates – which is why stucco is far more common in desert regions, like Arizona.
Moisture can penetrate the wood wall sheathing, affect the window casings and frames, or even wear down the stud framing of the home itself. Mold growth in wall cavities is also a common issue among older stucco homes in a warm, moist environment.
In addition, many stucco jobs are done improperly, or poorly maintained. A stucco inspector can examine the stucco for issues like missing flashing, cracks, improper fasteners, missing drainage accessories, improper depth of material, and other such problems which may indicate a poor or sloppy stucco installation.