Answer:
If the wall is newly moldy
With newly moldy walls, homeowners can use a brush to clean the mold stains with a specialized detergent (be careful not to let chemicals fall on people or food, which is harmful to health), then wait for the wall to dry, roll a layer of waterproof paint and cover it with a decorative paint.
If the wall is moldy for a long time
For cases where the mold has been there for many years and is dark in color, it is necessary to treat the inside by chiseling out the old mortar layer, then using cement and waterproofing materials such as waterproofing glue to fill it. The treated wall surface needs to be left to dry for 5 to 8 days before applying a layer of waterproofing. Finally, apply a layer of decorative paint to bring perfect beauty to the house.
To limit mold, maintain the longevity and aesthetics of the house, homeowners should use quality waterproofing paint for the project right from the beginning of construction.