When I saw the waterflow pole and brush I immediately knew this would help me with the corrugated roof over my patio! Living beneath pine trees we often get needles and dirt stuck up there. I don’t want to say it was easy because we had to lean out the upstairs window to clean parts of the roof but I now have a clean roof– at least until the next winter. The pole attached easily to our hose and the water came out with a good steady flow. The rubber bumper on the brush did not scratch or damage the surface and the brush fit in the grooves to push out the matted dirt and caked in pine needles. As you can see in the photos with a little effort I can still see a little dirt but now have sunshine coming through. I used only water to clean the roof and may try adding a cleanser next time to get a better rinse. I also used it for a quick scrub of some algae on the house. I would definitely recommend this to a friend.