Our house is 14 years old and about four years ago we started noticing black stains on our grey shingles. We kept seeing the signs in yards where Orlando Roof Cleaning had treated roofs around the area and decided to call. They came and did an estimate and we were amazed at how low the price was, it was very, very reasonable. They treated our roof and it looks great!!! Our roof looks very good and I am so glad we did it. It is so simple and they takes care of everything.