What is a sign of excessive moisture in a structure?

Stains and water dripping are clear indicators of excessive moisture in a structure. When water infiltrates the building envelope, it can accumulate, leading to visible stains on walls and ceilings. This may be a result of leaks from plumbing, roof issues, or inadequate drainage around the foundation. The presence of water stains not only signals existing moisture problems but also suggests that there may be ongoing issues that could promote mold growth and structural damage if not addressed promptly.

While signs like cracked walls and swelling wood can also indicate moisture issues, they may not specifically reflect immediate moisture presence. Cracked walls could arise from various structural movement issues unrelated to moisture, while swelling wood typically indicates that wood has absorbed moisture over time, showcasing a secondary effect rather than a direct sign. Dry patches, on the other hand, suggest a lack of moisture rather than an excess of it, making stains and water dripping the most direct evidence of excessive moisture in a structure.