Deck Doctor power recently washed our 20 year old tile roof.  The workers were courteous, efficient, and professional.  After the roof was washed, they were very careful to clean up any run-off debris from the sides of the house, surrounding garden, patio, and driveway areas.   (Of course, now I have to wash my windows.  Too bad they don't provide this service too!)  It's nice to have a new looking roof again!