I have a large metal sided woodshed that I'm going to convert half into my coop. I am planning on siding the interior walls as well...should I insulate as well? We get a pretty stiff winter wind out of the NW that will blow almost directly on the nw corner of the shed. The wood stays dry all winter, so I don't have any leaks....I just want to be sure it will be warm enough in the cold winter months. We are talking under 20deg for most of the winter and plenty of sub-zero days as well. I will also be installing heat lamps above the roosts as well as summer ventilation that can be closed if necessary. I'll still leave the run open during the day if the weather isn't too nasty. I used to live in Washington St., so none of this frigid cold weather was ever a concern for the chickens I had.