Living in michigan we have snow for most of the winter (although last winter we barely had any) so we needed to winterize. we cut up some plywood to close up some ventilation but not all, added a heavy duty tarp over the run and added thermometers on the outside and inside of the coop. here are the pics. The ventilation we left open The run area underneath the coop A view of the ventilation on the inside more bedding underneath roost And in the nesting boxes The girls roosting Ventilation closed on left side Ventilation closed on right side (this one didn't fit perfectly so I had to nail it in) Thermometer outside the coop I attached the tarp using 8 inch zip ties The Winterized coop!!