innnnsullllattttioonnn
is all i can say
double pane windows are worth the cash (even better if you can get them from the habitat store or used off a jobsite). We're in South-central (or eastern but really...we're in south central) Ontario and it gets pretty chilly (-30 sometimes) anyway our chicken house is insulated and has single pane windows that are being replaced with double pane this year. regrettably our coop is still a leaky siv but its getting extra insulation this year. our girls survived and did very well this winter...having no heat forced them to gain a lot of bulky awesome down and they did great.
is all i can say
