If your ceiling is moldy you may have a water leak in it or behind the walls.
Cleaning mold from walls and ceilings.
Mold removal from the walls starts by eliminating the main cause.
Thus it is possible that mold growth may be caused by the presence of damaged gutters an improperly made roof lack of insulation or defective insulation of the walls.
Then adopt the following practices to keep it from returning.
Remove mold stains from walls.
To remove mold from the ceiling use a step ladder or stool to reach the area.
Apply the solution to the walls and ceilings with clean rags.
Then use a paint scraper to remove the paint in the affected area.
Mix a solution of one part bleach to three parts water in a spray bottle and thoroughly saturate the moldy areas of the wall.
Open a window and or keep a fan.
If your basement has windows and doors open them a few minutes each day to allow air to circulate.
Dissolve 1 cup of borate based detergent in a gallon of warm water.
How to stop mold from growing on walls.
To get rid of mold on walls permanently remove it using the steps above.
To prevent mold regrowth coat your ceiling with a stain killing primer then paint over it with a mildew resistant.
Wait for the walls and ceilings to dry completely.
When you start fighting mold it is recommended not limiting only on removing the mold on the walls.