TOB, our coop is insulated, we used rigid foam boards. But, I think it was not necessary. I too had a couple of frozen eggs, and Earl had one tip of a comb about an eighth of an inch frost bitten. I had to heat the water dish. We did have to add vents at the peak of the gable end and about three inches over the door. I couldn't believe how warm the flock could stay all on their own. Your coop is built very tight and carefully with materials which didn't have to be adapted, so I too believe that insulation is not necessary. Someone once told me that the cavities between interior and exterior walls are inviting places for mice etc...just something to chew on...

I don't know what happened...I had them separated away from the rest of the flock in the coop with chicken wire around them and somehow they tore the wire down and this morning Gracie (my now unbroody mama) was sitting up n a perch like nothing had happened and all was well....ugh happy Friday to me....I should have taken them out of the coop like I had originally planned.
