shading a roof
so here's an idea
i have a small house with asphalt shingles and a ridge roof. what i want to do is built planters that i can set on the ridge, tie them into the roof and run a drip system up there to take care of the watering and fertilizing.
im thinking dune sunflower or passion vine since both do extremely well in here. have them grow from the planters and come down on the roof pretty much giving me shade and savings all day long. cut them back when the cold season starts and collect some of the winter heat.
so here a some things i'm wondering about. even if these plants wont grow roots inbetween the shingles can the wind make them wear the roof out?