How to Remove Mold From a Bathroom Ceiling
For mold under about 10 square feet on firm, painted drywall: fix the moisture source, wear an N95 respirator, gloves and eye protection, mist the area lightly, scrub with detergent and water, wipe with clean water, dry it fully, and keep the fan running. Stop and call a professional if the drywall is soft, the patch is larger, or the mold returns.
The EPA says that if the moldy area is less than about 10 square feet, you can usually handle cleanup yourself. This guide covers that case. In Florida, mold-contaminated areas over 10 contiguous square feet require a licensed remediator.
Before you start: is DIY appropriate?
| Situation | DIY okay? |
|---|---|
| Under about 10 sq ft, firm painted drywall | Usually yes |
| Drywall soft, sagging or stained through | No. It needs to be cut out |
| Over 10 sq ft | No. Licensed remediation in Florida |
| Mold keeps returning | No. Find the moisture source first |
| Someone with asthma, allergies or a weak immune system lives in the home | Consider a professional |
| Popcorn or older textured ceiling | Do not scrub or scrape. Test for asbestos first if built before the 1980s |
What you need
- N95 respirator (not a paper dust mask), goggles, gloves
- Detergent and water, a spray bottle, soft brush or sponge
- Microfiber cloths, plastic sheeting and painter's tape
- A HEPA vacuum if you have one
- A stepladder and a fan or dehumidifier
Steps
- Fix the moisture first. Check the fan vents outside, look for leaks above, and lower humidity. Cleaning without this fails.
- Protect the room. Cover the tub or floor, tape plastic over the door if you can, and turn the room's fan on to exhaust outdoors.
- Put on protection. Respirator, goggles, gloves.
- Do not dry-scrub. Lightly mist the area with detergent solution so spores do not fly.
- Scrub gently. Work from the edge inward, cloth or soft brush, and do not soak the drywall.
- Wipe clean. Use clean water and a fresh cloth. Bag the cloths.
- Dry it fast. Fan or dehumidifier until completely dry.
- Check the next few days. If spots return or the paint bubbles, stop and call.
- Prime and paint with a stain-blocking primer once fully dry.
What not to do
- Do not paint over mold
- Do not mix bleach with ammonia or other cleaners. It makes toxic gas
- Do not rely on bleach as a cure. The EPA does not recommend routine bleach use for mold, and it does not fix mold in porous drywall
- Do not scrub sagging or soft drywall
Preventing it from coming back
Run the fan during showers and about 20 minutes after. Make sure it vents outside, not into the attic. Keep humidity below 60 percent, ideally 30 to 50, as the EPA advises. Fix leaks quickly.
When to call a professional
If the patch is over 10 square feet, the ceiling is soft, the mold returns, or the source is unclear, see bathroom ceiling mold removal or call (772) 710-1549. Cost details are on the cost page.
Frequently asked questions
What kills mold on a bathroom ceiling?
Physically removing it does the work: detergent and water with scrubbing on firm surfaces, then drying. Killing mold without removing it leaves dead mold behind, and the EPA says cleanup, not biocides, is the core of remediation.
Can I use vinegar or hydrogen peroxide?
Some people do on small patches. They are not required, and detergent and water are the EPA's baseline approach. Test in a hidden spot and never mix products.
Why does mold come back after I clean it?
The moisture is still there.
Is it safe to stay in the house?
For small patches, generally yes with ventilation. People with breathing conditions should avoid the room while it is cleaned.