Our high temperature today on the Western Slope of the Rockies was 16 degrees. We also have about 14 inches of new snow on the ground. The girls were unhappy but walked about in the small area I cleared for them.
One thing you said concerned me, perhaps I misunderstood when you said that you go out and close up their run at night. Do you also lock up the coop, or hen house? If not, you're letting a lot of cold air into the coop and that will negate some of the effects of the insulation. Additionally, closing it up at night provides another barrier to predators. You'll probably want to keep them closed up and confined at night and let them out in the morning.
Mary
One thing you said concerned me, perhaps I misunderstood when you said that you go out and close up their run at night. Do you also lock up the coop, or hen house? If not, you're letting a lot of cold air into the coop and that will negate some of the effects of the insulation. Additionally, closing it up at night provides another barrier to predators. You'll probably want to keep them closed up and confined at night and let them out in the morning.
Mary