Hi, newbie here. I know we need window(s) in our coop. Does it need to be a real window? Or can DH cut a square, and cover it with heavy duty plastic? (His idea). How would he let air in? Do you put a screen on it? Also, can I see some roost pics? Does a roost need to be round? How high should it be? Our chicks are a few weeks old and have all their feathers. And finally, venting...what do you do to vent? Do you cover the venting with something that allows air in, but nothing else? How big should it be? And lastly, I live where it gets really hot in summer (high 90's), and can get a bit below freezing in winter. Do I need insulation? What do you cover the insulation with? Thanks! ETA: I forgot....can I cover the plywood floor with contact paper, that overlaps? To make clean up easier? Will that work?