Hey, there!! I have been trying to find some succsessful ways in keeping the coop warm in the winter. For keeping the wind out I have always put cardboard duct taped over the windows and on ecspecially cold nights, putting duct tape strips over the vent holes. The cardboard over the windows has worked pretty well in keeping the wind out, but as for keeping the cold out, it does not work very well. Also, which bedding do you prefer for keeping chickens warm in the winter? Happy New Year!!