This is my old barn that we're converting to a nice coop. It's overall size is 18.5' X 14', and the chickens have 11' X 13.5' inside. You are looking at the southeast facing wall. I want to put windows in, but I also would like to put roosting bars (all at one level with poop shelf for easier maintenance) on this wall. I have two goals for the windows: let in natural light and better ventilation, esp. in summer. Questions: 1. Would putting a roosting bar near good, insulated windows be a plus or a minus during cold winter months? 2. If a minus, could I put them up higher than the roost, maybe with a box over to keep cold from dropping onto them? Or... other ideas? Thanks in advance!