Symptoms
- Musty smell when opening the closet door
- Visible spots on the wall, floor, or stored items
- Items feel damp or have a white or dark film
Likely causes
- CommonPoor air circulation behind clothes or stored boxesA closed, packed closet traps humid air against the wall with nowhere to go.
- CommonCloset located on a cold exterior wallCold exterior walls encourage condensation, especially in closets that stay closed most of the time.
- PossibleNearby leak, such as from a roof or an adjacent bathroom wallA shared wall with a bathroom or an upstairs leak can feed moisture into a closet from behind.
What to do
- Remove all items from the closet and inspect the walls, floor, and baseboards closely for mold or dampness.
- Check any affected clothing, shoes, or boxes and clean, dry, or discard heavily affected porous items.
- Clean visible mold on hard surfaces with a mold-specific cleaner, then let the space dry completely before restocking.
- Leave the closet door open periodically and consider a small fan or moisture-absorbing product to improve airflow.
- Avoid packing the closet too tightly against exterior walls to allow some air movement.
- Check the exterior side of that wall for a nearby leak source if the closet backs onto a bathroom, roof line, or plumbing.
- Consider adding closet ventilation, like louvered doors, if the problem recurs regularly.
Tools and parts
- Gloves
- Cleaning cloths
- Small fan
Mold cleanerSearch: “mold and mildew cleaner”
Moisture absorberSearch: “closet moisture absorber”
When to call a pro
Call a mold remediation specialist for extensive growth, and a plumber or roofer if a leak is feeding the closet.
Safety
Use caution
Wear gloves and a mask when handling moldy items, and wash hands after cleanup.