Hi chicken-people, I'm new here and new to chickens in general. I thought I'd run my plan by you guys to see what you think. We're building a 6x7' coop out of used privacy fence panels we found on craigslist ($25 for ten of them! Woo, hoo!). The panels are basically a bunch of 1x4s joined together--they're pretty tight to each other, but there are small cracks (1/8" max) I intend to fill to keep drafts out. Now, the roof. What I'd like to do is just use metal roofing, the corrugated steel kind over the rafters, with no underlayment. Because that would be cheap ;-). I would leave the rafters open, at least on one end, for ventilation (there will also be two windows). Is this a bad idea for whatever reason? We're in southern Maine, there will be snow, it will be cold. But we intend to only keep extra-cold hardy breeds, like buff ops, Wyandottes, Plymouth Rocks, etc. I'm planning on somewhere between 5 and 10 hens. I do not intend to heat the coop, and plan to do the deep-litter thing. What do you think? Plain metal roof OK? Also, filling the cracks in the fence: what to use? I don't want my chickens to peck at it. Thanks!