Soap scum, shower walls, ceramic tile and fiberglass are all possible surfaces for mold growth. Laundry rooms are common places to find mold if damp towels and clothing are present. Unvented clothes drying, which produces high levels of relative humidity, can also cause mold. Kitchens are possible sites for mold growth if large amounts of water are boiled using no exhaust fan. Refrigerator pans in automatic defrosting refrigerators also commonly have mold.
Closets often have mold growth, especially if clothing is stored damp or dirty.
Conditions for Mold Growth Molds grow on organic materials such as paper, leather, dirt and soap scum. They grow best at warm temperatures, between 77 and 86 degrees Fahrenheit, although they can grow in temperatures between 32 and 95 degrees. Molds grow in moisture. Water leaks, flooding, high relative humidity and condensation are all situations that increase the growth of mold. How to Prevent Mold Cleaning, disinfecting and drying surfaces prevents mold growth.