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

 This house sits in the middle of a corn field and has irrigation water blown onto it all during the summer months...so the GM growing on it is very healthy and because of the irrigation mist, it's probably a very favorable situation for quick regrowth. With that being said, another area roof cleaner who doesn't use ARMA methods cleaned a roof during the same time frame and his is already showing algae and there is visible damage from a water broom being pushed up/down the roof. It's hard to believe that with good, solid, technical information being a few key strokes away contractors are still stuck in the past, wasting time and ruining roofs...sorry bout the rant