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Thank you for the pricing info. I havent invested in a rig per say yet, I just grabbed an old water transfer pump I had in the shed (not sure how long it will last with the chemicals, but hopefully long enough for me to order and receive whatever rig Im going to use) and connected it to my pressure washer wand via a garden hose, and the thing shoots water about 40-50 ft. I am looking at some setups online right now trying to decide exactly what I am going to need. I already have my first job, but its a freebie. Im gonna test out my methods on my mother in laws house. Just a bit of strategy there since about 60% of the houses on her street need a good roof cleaning, plus it never hurts to be on the inlaws good side.  Hopefully I do a good job and all the neighbors will be jealous of her nice clean sparkly roof. Her roof is around 45 squares, so if I was charging .15 per sq ft that would be a $675 job correct ? Most of the houses on her street are as big as hers if not bigger, so hopefully once they see the results some of them will want their houses to look as good. I have read many posts so far about how to mix the chemicals and stuff, all I will have to do is find a good place to buy the chemicals, and hopefully I will be able to do it when I get home from vacation. I guess I also have to talk to my insurance agent and see if they will cover roof cleaning, as I kept roofing excluded because of the ridiculous rates, but did include gutter cleaning which still involves getting on a ladder (on most roofs with a 7/12 or below I usually clean from the roof).

Was curious if any zinc solutions have been used to clean the roofs. Reason I was wondering is shingles come with a 5 yr to 7 yr algea resistant warranty, depending on the brand, and all they do is add some zinc to their aggregate mix and everytime it rains it releases some, but after time I guess it runs out. We have even done jobs where they wanted us to install the zinc strips at the edge of the roof caps, which does a pretty good job of controlling the algea.