How does mold get inside of buildings?
Mold grows when there are moisture problems that result in building materials being constantly dampened by water. Poor air circulation or inadequate ventilation can also contribute to excess moisture. One of the best sources of food for mold is cellulose, which is the primary constituent of wood and paper products. Modern building materials such as gypsum wallboard, acoustic ceiling tiles, wallpaper, fiberboard, and particleboard are all likely to encourage mold growth if they become exposed to high humidity levels, condensation, or water.