I did insulate and now I'm very glad I did. The other day, as you know, we had a spat of hot weather that is is just not normal for this time of year. I went out the coop for something, oh yeah, to check on the broody. I noticed the sun was really beating down on the west side of the coop. I put my hand on it and it was most definatly warm. I reach in through the pop door and felt inside just to see if there was a difference. The inside was really cool compared to the outside. I know that made the broody feel better. Plus it keeps the sand in the coop cooler too. That I do like.
