We will start building the chicken coop this weekend. The only thing I am still iffy on is what to use for the roof. We live in S. TX with some very intense sun and heat. The coop will be under trees but will still get sun. I'm confused about the polycarbonate panels (like SunTuf) I'm getting mixed ideas reading, good for environments like mine or not? I know that plywood or corrugated metal will be hot and stuffy as all get out.