Molds can be found almost anywhere; they can grow on virtually any organic substance, if moisture and oxygen are present.
There are molds that can grow on wood, paper, carpet, foods, and insulation. When excessive moisture accumulates in buildings or on building materials, mold growth will often occur, particularly if the moisture problem remains undiscovered or unaddressed. It is impossible to eliminate all mold and mold spores in the indoor environment. However, mold growth can be controlled indoors by controlling moisture indoors.
Molds reproduce by making spores that usually cannot be seen without magnification. Mold spores waft through the indoor and outdoor air continually. When mold spores land on a damp spot indoors, they may begin growing and digesting whatever they are growing on in order to survive.
Molds gradually destroy the things they grow on. Many types of molds exist. All molds have the potential to cause health effects. Molds can produce allergens that can trigger allergic reactions or even asthma attacks in people allergic to mold. Potential health concerns are an important reason to prevent mold growth and to remediate/clean up any existing indoor mold growth. Since mold requires water to grow, it is important to prevent moisture problems in buildings.