If you are having a property that will not sell because of roof staining check this out. Does anyone have a clients that has tried a product like this? I have not, but I can add this to my bag of tricks on getting listings sold. If you look at the before and after pictures what a difference. Here is the link I found http://www.roofshampoo.com/ Here is their blog if you want more info http://roofcleaning-blog.com/
pictures taken from Exterior Surface-Brite, Inc. website.