2026-09-11
Why basements are vulnerable
Basements stay cooler than the rest of the home, which means warm humid air condenses on basement surfaces. Foundation seepage, drainage issues, and slow plumbing leaks add moisture.
Finished basements can hide growth behind walls for long periods.
Common causes
Foundation seepage from clay soils and poor drainage, condensation, appliance and plumbing leaks, and water-damage events that weren't fully dried are all frequent causes.
What to do
If you notice musty odors, discoloration at the base of walls, or damp flooring, a professional evaluation can identify the source and recommend next steps.
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