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

I'm new to this, and I'm sure it's been discussed and I can't find the thread. Do you guys offer a separate maintenance service to keep the revenue coming from your existing customers? I guess what I'm asking is do you offer a spray-and-walk-away service on an annual renewal basis that maybe guarantees no-algae-return? Maybe you spray a 10%Sh/50%H20/35%zinc sulphate/5%Dawn solution on an annual basis for half price, but that keeps the black gone and the green coming, and you're done in 15 minutes.  Anyone doing that?