Anyone got a good way to clean of the roof shingles?
Spray it and Forget It
http://sprayandforget.com/
Works great on Roofs, Siding and Paint. Never tried it on concrete. For siding and paint clean first and then spray this as recomended. Will keep mold and mildew off for at least a year. (Only need to do the sides of the house that mildew.) And for roofs it will clean that black crap off. I had to do 2 coats about 6 months apart and it took a year for most of it to come off. I only did part of my roof so I could tell how it worked. Works great and easy to do. Just buy the hose spray attachment hook it up and spray down the roof. Done You can get it at some Ace stores but I ordered mine.