I like to use rolled roofing...goes on fast.. however its only est life is 10 years..i use the type the comes in 90lb rolls. first lay your roofing felt, then roll it(rolled roofing) out to warm up in the sun..spread the goo around and start laying it.. works well.
Charlie
Buster i see projects written all over that coop, wish i was closer id certainly give you a hand..did the same thing, prebuilt all the frames in our garage (for five of our coops) and much closer to the the fridge for the mikes hard lemonade, always made things go smoother...Looking good so...