Many of my clients are now asking me to clean their carport roofs. I have an idea of how I can do it but it seems like there must be something easier. If any of you guys out there clean carport roofs could you please let me know how you're doing it. I really don't want to have to walk the roof as I don't feel that they are strong enough. Some of the roofs are flat but others are pitched. Also with regards to charges I was thinking that a pitched roof would cost $70 and a flat $50?