Bye Bye Roof Stains cleaned my roof for the first time 3 years ago. I thought the black stains were dirt from the trees I lost from the ice storm we had that year. They told me it actually was a fungus that would continue to grow if left unattended. A year ago I had them clean my decks, back porch floor, storage building and driveway. I was so please with the results I had them come back and clean my shadow box fence. I was amazed that it made everything look brand new! I am so glad I made that first call and highly recommend them.