If you see or smell mold, you have a problem. Reliable sampling for mold can be expensive since it requires special equipment and training. Testing is not generally recommended as a first step. 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. Places Molds Grow Basements may have mold if they are wet or damp. Bathrooms are more likely to have mold growth if exhaust fans are not used while showering or bathing. 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.