We have 2 hens and a small coop that can hold 4 - 6 birds. We got it free from a friend who had rabbits in it and we got it last winter. ANYWAYS.... where the roof meets the walls, there's a 3 inch gap that was put in there for ventilation in the summer. Last winter we stuffed the gap with bubble wrap and towels. It was temporary and it lasted us the winter. Now, another winter is upon us. How would I insulate this coop? I might be able to post pics tomorrow.