Wet and Forget Moss, Mold, Mildew & Algae Stain Remover, 1 Gallon Concentrate Make 6 Gallons - 2 Pack

Just an idea for getting Wet and Forget on to a steep roof. I climbed up to the third rung of a firmly planted ladder. The squirt gun got the solution to hit the roof at 15-25 feet. I mixed the solution in a big jug at the 1:5 ratio and used a funnel. simple. Although I had to refill the gun often, I revel in the satisfaction of not hiring anyone to do this for me .It worked pretty well.

Works good but you have to wait a long time for it to work but works well

Great stuff ...