Molds are microscopic, filamentous fungi that multiply by spores. There are also beneficial mold species, which are widely used in various industries. Mold spores are carried in the air over long distances for indefinite periods and are resistant in all climates. When they encounter favorable conditions, they grow, forming new colonies. Molds found on the walls of rooms are known as damp molds and form mainly in places with high humidity and poor ventilation. The removal of mold from surfaces is done with specific products. Certain measures are also required to prevent its formation.