I wanted to provide this information regarding my experience with your Roof Cleaner QSE.
I recently used QSE Roof Mold Stain Remover on my heavily stained roof. I used a tank sprayer for application along with a 1700 PSI pressure washer using the wide setting from a distance of about 8 inches to rinse it off. Roof Cleaner QSE is incredible.
Our roof looks like new and my fussy wife couldn't be happier with the results.
Thanks for providing a product that actually exceeds expectations.