I'm in ND and since we have flat land, the wind blows hard and the winters are usually pretty cold with 8 weeks or so in the below zero F area. My husband is making me a chicken coop, and we're trying to make a decision about the size because of the cold. Just a background reminder, I'm the one that found 3 chickens that had been dropped off at my farm and am now a new chicken owner! So we don't know much about them and are learning from you. The coop is 10X14 with a slant roof that is 12 foot high at the highest and 8 foot at the lowest. I am planning on sectioning off 1/4 of it for feed storage and just in case I get addicted like everyone seems to, it can be an extra area for raising babies, etc. I thought we could just put the wall up and be done with it. But he thinks he should have the wall make the chicken area smaller so they stay warmer since there are only 3. Then in the spring he would put it where I want it. We have insulated and are planning on using a heat lamp if needed. So all of this leads to my question... Do we need to make the chicken area smaller so they stay warmer? I have read about the ventilation but it gets too cold in this area without some form of insulation. We are going to use vinyl siding on the chicken coop that was leftover from our house. Should we use house wrap or that fan fold insulation board to keep the coop warmer? Or does that make it too air tight?