I built a 6x10 Woods Coop this summer in the NE corner of my garden, facing SE, to house my 5 pullets, 2 BOs, 1 SLW, and 2 EEs. The last three days has seen record breaking cold in much of the Midwest, including here in Mi where I live. Even with winds up to 30mph and windchills down to -35F, the coop stayed draft free and dry. However, my poor BOs have frostbitten combs. Despite staying draft free with low humidity, the frigid cold caught up with them. My other birds, with pea combs, seem to have weathered the cold without any problems. Here's a pic of the girls peaking out in 10F. A little snow blew in the first 6 inches or so but it hasn't seemed to keep the girls from standing in front of the windows when the sun shines. If anyone is thinking about a Woods Coop this size I highly recommend it.