Common attic moisture sources
- Roof leaks
- Bathroom exhaust venting into the attic
- Condensation on roof decking
- Wet insulation
- Air leakage from conditioned spaces
Why the cause matters
Cleaning visible growth without correcting the moisture source can allow the problem to return.
Reference standards: Our educational content uses U.S. EPA mold and moisture guidance and Florida mold-related-services rules as general reference points. For health concerns, consult a qualified health professional.