There seems a boom lately in folks wanting to get into roof cleaning and even though I do it myself I dont comment much on it as it is dangerous. A fall from a roof is a good chance of death or worse (crippled in a wheelchair having to listen to the missus saying 'told you so' all day every day) On another post I gave a price I would charge and the other user thought it was way too expensive. Well..... no. I want to be compensated for risking my life. Here is a vid off the youtube I like, some may think this overkill but he's going home in one piece. If you're going to do it then have the decency to do it safely. Also check your insurance policy as most dont cover roof cleaning.