First called Dr. Roof to see if they cleaned mildew off roofs. They didn't but were kind and confident enough to recommend Advanced P&G Cleaning Inc. Happy they did. Daniel Willoughby was very good. Nice, professional and did a great job. Evaluated my roofs condition and then told me about another thing to look out for. It is expensive for what seems to be a basic process but I would gladly recommend them and will use them for other things.