I have recently looked into growing on roofs, right now I am keeping my babies plants on the top of my chimney, which is good, but is a little bit noticeable, i have also thought about growing on the top of my local YMCA, the amount of sun would be great, and the carbon diode from the vents may help them out. So just wondering any ideas on how to better hide them up there, or any other suggestions, i currently am growing in tree tops, I am very unconventional, , the treetops are great, but are messy to get up, hard to water, so my roof would be much better, i have scoped out around my roof, and found that there is no actually "blind" spot on my roof, and i can see the plants on my chimney if i really look hard, so, so far i have thought of making a little box, and put some sort of sheet metal around it, this is because the cover of my chimney is sheet metal. But anyway any roofs that i could grow on?lol