It won’t grow hair! Things are different now. Construction technology has improved and materials are different. I used to think that mountains would grow hair, but not anymore! I just bought it too, and it’s a big one. It's being renovated now. As for the cold? It was a little colder than other homes at the beginning, but it didn't affect it at all. It's enough, but I heard that it will gradually drop a few degrees over the next few years, but don't worry! I think it’s okay