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

I use a local company that works out of their house. Does great work, and I can stop there in person to go over the layout. I like to be able to talk face to face with the people doing my shirts and fliers, business cards. Plus, I have gotten referrals from each of these business's for roof jobs.
Great way to market yourself locally.