Is the dog house insulated ?

It's a igloo, it better be! Keeps my dog cool in the summer and warm in the winter.

No it does not have insulation but let me share a short story with you. We always took our dog inside when the temp was at 20 f , or lower. One night my dog didn't want to come out of her house and come inside mine so I crawled into hers when is was 15 f, and it was very warm I stayed out there for over a hour talking to her. So we would never bring her inside again unless see did some go spotting. I always put half a bale of hay which in the city you can find at Lowe's.

No, sorry this is not an insulated dog house.