Identifying Mold Problems   Things you should know about mold and indoor air quality: Molds are simple microscopic organisms that have been around for thousands of years. They are found everywhere in the environment, indoors and out. Most experts agree that there are 80,000 to 100,000 or more different kinds of mold. Of these, only about 200 have been identified.   When sufficient moisture is present and an organic food source exists, an amplification of mold is possible. If the conditions continue, mold can flourish. Sources of moisture include: Roof leaks, especially around flashings Pipe leaks Condensation around windows, fixtures, and pipes Improperly vented exhaust fans in attic from kitchen, bath or laundry HVAC and refrigerator drip plans Water intrusion due to improper exterior surface grading or clogged gutters and downspouts A common organic food source around the home is cellulose (paper) substrates, such as: Paper on the face of drywall or paper backing on insulation Cardboard Ceiling tiles Carpet Wallpaper More >