I rarely write bad reviews, but this product deserves one. 
The materials are cheap, if you are not extra careful  when putting the pieces together, which are not easy, you might break them. I bought thinking that would provide great insulation during winter to my dogs, but the wood pieces are too thin and not enough to keep the house warm when it is cold, and I live in LA where doesn’t really get that much cold. 
After 4 days, the metal piece that holds the roof while opened has already broke. 
Please, don’t waste your money, get something more expensive that will last longer and provide comfort to your dogs.