Air Quality
What you're seeing
Sweating ductwork, condensation on pipes, and clammy air in the house mean crawl space humidity is out of control. High humidity alone — with no standing water at all — is enough to grow mold and rot wood.
Common causes
- Open foundation vents admitting humid outside air
- Ground moisture evaporating into the space
- No dehumidification or encapsulation
- Air leaks between crawl space and living area
