It gets single digits here at times but mostly in the teens at the low and average is high 20s to low 30s on regular winters. I think the hay stacked up on the walls is a very thick and effective insulator, as long as you allow for good ventilation at the top of the arch, as I will do. Hay has some humidity of it's own to add to the chicken's...luckily, ventilation is an easy thing to arrange on this style coop. I plan to do a double layer of plastic on the end caps but keep the top of the arch open.
I don't have anything on the bottom for digging preds, as I have a great dog that lives near the coop/chickens...but it's pretty simple to just put a 1x1 welded wire floor on the thing. The wire floor would even make it more simple to move if you move it with the chickens inside...no running over any chickens that way.
Total cost of this build was $205 but would be slightly more with wire flooring and overlay.
I don't have anything on the bottom for digging preds, as I have a great dog that lives near the coop/chickens...but it's pretty simple to just put a 1x1 welded wire floor on the thing. The wire floor would even make it more simple to move if you move it with the chickens inside...no running over any chickens that way.
Total cost of this build was $205 but would be slightly more with wire flooring and overlay.