The mold affects the walls and ceilings of various buildings, it is one of the environmental issues affecting the general specifications (physical, chemical and biological) of building materials. Other factors play a role in enhancing the appearance of mold, including the lack of direct sunlight inside the building, the high humidity in the air, And the presence of wallpaper, glue and untreated wood, which is an incubator is essential to mold, and even dust provides food for mold, and there are many dark places that allow mold to grow.