My family and I kept getting sick. It seemed like it was coming from mold or mildew somewhere in our house. He cleaned and checked everywhere for mold and found nothing. We talked with some friends and they suggested that we call someone with BPI training because they would not only find the mold or mildew, they would find the source of it and fix it. So, we called a contractor with BPI training. When he came out he found the mildew and replaced part of our wall. Then he said that he found the source of the problem and that he had fixed it. We have not been sick since!