[Shikarnov]

I advise you to talk to local professionals unaffiliated with your builder. When I had my house built a few years ago, I trusted them and their people. But later, when things started going wrong, and I had to call for professional help, it was discovered that some pretty big corners were cut - which were expensive to do properly... So pay attention to everything, and get independent eyes to look at that which you can't see.