The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

If I was you I would carry the tech bulletins around and every time you seen one, take and walk up to the door, knock and hand it to the home owner. Let them know just how much pressure is coming out of that surface cleaner and how damaging it is to there roof.

I have  a guy around here that uses a 3000 psi pressure washer, me and him was accross from one another on the same street. I showed up after him and he had been there for almost 45 mins before me, I was done way before him plus he had ladders laying in 3 places on the roof. He was moving them around so he could way and power wash the roof. His customer came over when i was leaving and ask me why I was done so fast and there neighbors roof looked better than theres since there shingles looked lighter now. I explained it to them and haded her a tech bulletin, it was some funny Chitz to watch her start freaking out and yelling at the gentlemen on her roof just plasting away on the shingles. I just drove away smiling but at least she knows now.

O man o man, that is the best story I've heard in awhile!!!