I live in zone 7b in Chattanooga, TN. This is my first winter with chickens. Last year we had a very cold winter for us. We were down to 5 degrees on several nights and stayed in the teens for several weeks. On the other hand, we might be in the 40's or 50's for a week at the time. It is predicted we will have a cold winter again this year. We get snow some years and have had a lot for the last several winters. (that is for us, not for people who have snow all the time) My run and coop are under my screened in porch next to my house so they are somewhat protected from the wind. Part of the run gets wet from water coming from the deck, but the whole coop and about 2 feet is under the covered porch. The coop is on legs so they go under it too. Here are a few pictures showing what the coop looks like. I was considering putting construction plastic around the run and maybe across the top and back. Any thoughts on this?