Whats best roof cleaning agent
Hi my name is Charles I'm new to this site and I need help on what to use to clean very dirty roofs in South East Texas. I mixed 4 cups of green wash with 15 gal. of bleach and 34 gal of water. I sprayed on the roof and let sit for 10 minutes and it helped a little but not a lot. What can I do to improve this or what did I do wrong. I don't know how much it matters but it was about 54 degrees outside and very cloudy. Any help is greatly appreciated. Thank you, Charles.