Since mold is a fungus that thrives in damp environments it is not uncommon to find mold growth on a bathroom ceiling.
How to treat mold on bathroom ceiling.
The key to stopping most mold is to control dampness.
People have been told for years to use bleach on mold in the belief that it has fungicidal properties but recent information says it doesn t.
Ensure proper ventilation and air circulation.
After cleaning consider repainting the ceiling with anti mold paint to prevent recurring issues.
How to treat bathroom mold before painting.
To speed up the job try a mold cleaner specially formulated with mold killing ingredients.
Bathroom mold prevention and remediation.
You will need to treat the ceiling after you have cleaned it and take steps to correct the problems in your bathroom that contributed to mold growth in the first place.
If the surface is too porous to remove mold completely such as in ceiling tiles you may have to replace it.
To prevent mold regrowth coat your ceiling with a stain killing primer then paint over it with a mildew resistant latex topcoat.
It can also cause permanent damage to your home and must always be treated as soon as possible.
Otherwise it is likely to peel.
To avoid the accumulation of mold spores it is vital to circulate the air when the shower or bath is being used especially if the weather is hot and humid.
Ceilings constructed with any porous material cannot be cleaned and must be replaced but smooth ceiling surfaces can be cleaned inexpensively and with relative ease.
Always undertake mold removal and dry any surface before you paint.
A bathroom ceiling fan or room vent would reduce a great deal of the moisture in the room.
These make ideal conditions for mold to grow.
The worst infestations usually occur in damp crawlspaces in attics and walls where water has leaked in from the outside and in basements with poor foundation drainage.
Ceiling mold is unsightly unhealthy and a bit of a challenge to clean.
The bathroom is exposed to excessive moisture from the shower and is often not properly ventilated producing high levels of humidity.
Be sure to open any windows in the bathroom when you are showering even if it is just slightly.
References this old house.