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

If you live/work in Florida, this is a wroth while group to join, IMO. Most of the emails you get will not be pertinent to exterior cleaning, but you can pick up a cursory knowledge of applicable state codes and regulations.

Occasionally they debate environmental issues which affect all of us. Plus, you can always ask a question yourself.

http://myfloridacode.com/mailman/listinfo/codetalk