Mold is a kind of fungal species developing in the presence of damp and extremely moist areas. They develop in wooden structures if the wood has too much of water for them to germinate and grow. They cause decay in the woods and trees to the stage of rotting or decomposition and eventually assist in their absorption in the moist soil.
Mold also tends to develop in bathroom floors especially in the joints of the floor and walls in the unnoticed areas near the shower floor. The prolonged period of absence of proper cleaning help them to spread rapidly into the walls encompassing larger area.