Surface mold or leak?
| Sign | Likely cause | Action |
|---|---|---|
| Black spots on grout or caulk | Surface moisture and soap film | Clean, dry and re-caulk |
| Mold on the ceiling above the shower | Poor ventilation | Fix the exhaust fan |
| Soft wall, loose tile, musty odor | Leak behind tile or shower pan failure | Open and repair; professional removal |
| Mold on the floor near the tub or toilet | Seal or supply leak | Plumber, then dry and remove |
How to clean small areas
- Wear gloves, goggles and an N95-type mask.
- Ventilate the room.
- Scrub with detergent and water, then dry.
- Replace moldy caulk.
- Never mix bleach with ammonia or other cleaners.
Prevent it
- Run the exhaust fan during and for 20 to 30 minutes after showers.
- Make sure the fan vents outside, not into the attic.
- Wipe down shower walls.
- Fix drips and leaks promptly.
- Keep humidity below about 50 percent.
If you find larger or hidden growth, see mold removal and wall mold removal. Hidden leaks are found with water damage inspection. If there was a plumbing failure, see water damage restoration in Garland, TX.
Ready to talk to someone?
Describe what happened and your ZIP code. You will be connected with an independent provider.
Frequently asked questions
How do I get rid of mold in my shower?
Clean small surface mold with detergent, dry and re-caulk. If it keeps returning, check ventilation and leaks.
Is mold behind bathroom tile serious?
Yes. It indicates a leak and often damages drywall and framing. Open the wall and repair.
Should I use bleach in the bathroom?
Bleach is effective on hard surfaces but not on porous materials. Ventilate well, and never mix it with other cleaners.
Can a new fan fix bathroom mold?
It helps if poor ventilation is the cause. It will not fix a leak.