Central Texas is hot summers and decent winters. We've had success with wide high windows and a gap on top, slanted roof protected by hard cloth. I built it with that recommendation, bad smell, gases, heat, etc will raise. Thus that gap. I think I have a picture of our coop on my profile. So...
Very nice pictures guys! Here's my latest pics of our Kerr County Tractor Coop (ours is pwemanwnt). I added externa nesting boxes to give our girls more space. They spend most of their time free ranging though.