Buildings, rooms, houses, usually indicate you, yourself, your life and everything in it. If you are outside of the house sealing the doors and windows, it indicates that you are closing yourself in, introverting shutting in painful emotion or hurt.
If you are inside the house, you are locking yourself away from the world, doping exactly as you said, hiding. Do you have something in your past that you wish to forget? Are you keeping a secret that you know should be shared? Do you need to talk to someone but don't know who to trust? The dream is a warning that you are in danger of sealing out the world from your life, maybe you need to think about confiding in someone.