I have a customer that wants the dormer windows (eves sides etc) cleaned along with the rest of his house. He does not want the roof cleaned. The problem that we thankfully realized before I do the job is that if the chemicals get on the roof while cleaning then they might create clean streaks on the roof. I'm thinking that if I wet the surrounding roof first then do the dormer wash that might keep the roof from getting streaked. Will this work or is there something better to do.
Thanks for your help.