Believe it or not, I insulated my coop (from ceiling to floor) with political yard signs. They're made of a tri-walled thick foamy plastic. My husband ran for state rep a few years ago and we had a whole pile of these signs in the barn. They hang easily, I used a staple gun with half inch staples. The coop is a patriotic red, white and blue with our last name all over the place...but...it is draft free. The girls go in and out through a small double pane window to their run which will soon have an added layer of clear plastic to keep out the snow and wind this winter. They should be cozy this winter.