Just finished a roof with alot of moss. It behooved me how a 10' strip of this roof had no moss. Then I caught the homeowner on video claiming a local franchisee of Roof Shampoo came out and cleaned the one section a few months ago. They gave her some bs why they couldnt finish. I know why, it was too scary for their method. I'd love to play the video but she doesnt know I clipped her.
The funny thing is they convince people to do it...
For $5.000 dollars they give you an area and a concrete surface cleaner with 1 bucket of cleaner. The agreement you sign, locks you into buying X amount of cleaner from them a year, or else!
I want to post the video. I just dont understand the ramifications. Im not sure if the individual companies who buy into the roof poo poo are those that are creating static. I kind of feel bad if I out a small company who's just trying to make a livingn like we are.
Treat and let fall of naturally if walkable you can rinse but always charge accordingly. We have done jobs that were fully covered in moss and within 2-3 weeks more than 70% had fallen off.