Other than aesthetic purposes mildew removal is necessary to prevent the spores from spreading and further contaminating the bathroom.
How to treat mildew on popcorn ceiling.
You will have to remove the affected portion of ceiling and replace it.
The mold will simply come back quickly later.
Mildew is a fungus that contains a musty odor and appears as multicolored spots on ceilings.
If any kind of porous material popcorn wood drywall etc has been used on your ceiling then you will not be able to clean it properly.
Builders sprayed a stucco mixture on the ceiling that had a lumpy cottage cheese like texture.
Many homeowners got rid of their popcorn ceilings in the half century since they were all the.
Popcorn ceilings were inescapable from the 1950s to the early 1980s.
They were a quick cheap way to finish ceilings in tract homes and apartment buildings.
Also depending upon how much mold or mildew it is that you have.
Continue to clean your brush off in warm water as you work through the moldy area.
Examine the material used to construct the ceiling.
If its just a darkening of the ceiling and its really only a sand texture you can clean the surface using a bleach and water solution to remove any loose mold growth let dry then paint using a good quality mold resistant primer.
Scrub the mold away with warm water and a scrub brush.
If your ceiling is moldy you may have a water leak in it or behind the walls.
To prevent mold regrowth coat your ceiling with a stain killing primer then paint over it with a mildew resistant.
Zinzer makes several types.