Moisture and ventilation are essential to proper construction.
Commercial and single family residential construction techniques have seen a change in recent years. Today, tightening the structures to prevent thermal leakage is a common practice. This can be attributed to the demand for energy efficiency. However, this change in the construction process has led to less air infiltration, which has contributed to moisture problems.
If preventative measures aren't taken during the construction process to manage moisture, you may find yourself in a situation similar to the one detailed in this article.