Bathroom Mold and Humidity: What Actually Fixes It
Heads up: some links on this page are affiliate links. If you buy through them, Rescue Remodeling may earn a small commission at no extra cost to you. We only point you to products we’d be comfortable putting in a client’s home.
Black spots on the ceiling, grout that never stays clean, peeling paint: bathroom mold is almost always a moisture problem, not a cleaning problem.
Fix it in this order
- Check for leaks. A slow leak behind the shower wall or under the toilet feeds mold no matter how well you ventilate. Soft drywall or loose tile is a red flag.
- Get a real exhaust fan, vented outside (not into the attic), and run it during the shower and for about 20 minutes after.
- Lower the whole house’s humidity. If the rest of the home sits above 60%, the bathroom never dries out. See whole-house dehumidifiers.
- Clean and seal. Clean small mold spots, then regrout and recaulk so water can’t soak in.
When it’s more than surface mold
The EPA suggests that a moldy area larger than about 10 square feet may call for a professional. Mold that keeps coming back in the same spot usually means water inside the wall.
Humidity control picks
ALORAIR Sentinel WHD 100 Whole-House Dehumidifier
Rated for homes up to about 2,300 sq ft. Ducts into your existing air handler so the whole house stays drier.
Check current priceALORAIR Sentinel HD35P (70 PPD, built-in pump)
Compact unit with a built-in pump, so it can push water up to a sink or out a wall. Rated for about 1,000 sq ft.
Check current priceWe fix the causes: regrouting, tub and shower recaulking, water-damaged drywall repair, and full shower rebuilds.
Rescue Remodeling handles moisture repairs, water-damage rebuilds and remodeling across Brevard County. Free estimates, and the owner answers.