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

And as you suggested in the new forums Chris, it's a great way to build up the SEO of your website by posting on well known forums that fall under roof cleaning, power washing, cleaning, etc... I went ahead and signed up in the PWRA forums. I posted some stuff yesterday evening but I'm still waiting for a mod to approve them apparently.