Fix the source of moisture (repair leaks, improve ventilation, run exhaust fan, keep room dry)
Wear protective gear (gloves, N95/respirator or mask, eye protection)
Protect the floor and surrounding area with plastic sheeting and painter’s tape
If the mold is small and non-porous, use a mild detergent solution; if larger or persistent, use a mold-killing cleaner
For non-porous surfaces (painted drywall/ceiling paint that isn’t peeling): spray or apply a mold remover that contains hydrogen peroxide, bleach solution, or a commercial mold cleaner
Prepare a bleach solution if using it: mix 1 cup household bleach per 1 gallon of water (do not mix bleach with ammonia or other cleaners)
Apply cleaner to the affected area without soaking the ceiling
Let it dwell per product label (or about 10–15 minutes for bleach solutions)
Scrub gently with a stiff brush or sponge
Wipe with clean water and dry thoroughly
Repeat application and scrubbing if any staining or spots remain
Remove any peeling or damaged paint or drywall if mold has penetrated (cut out affected material and discard)
Dry the area completely using fans and dehumidification for 24–48 hours
Dispose of contaminated materials in sealed bags
After the ceiling is fully dry, prime and repaint with a mold-resistant primer and finish coat
Recheck after a few days for regrowth and continue addressing moisture if it returns
If mold covers a large area (about 10 sq ft or more), or if there’s extensive ceiling damage or recurring growth, contact a professional remediation service