Been researching this myself- here is what i learned: There are three main vault door options: Browning and Fort Knox both make one, and you can also get a custom one from Smith Security Safes. The latter is the wider of the three and most customizable from dimensions to thickness to types of security features. Things to consider in a safe room: Make sure door swings in! Plan for hvac and think about running a drain into the room in case you want to run a dehumidifier. Also plan for electric and think about lighting plans. If the room is all concrete then i wouldn't be too worried about fireproofness [emoji106] Ask yourself - is the room just for storage or is it a "safe / panic room". If the latter you will want to think about ways to communicate with the outside world, possibly have a hidden escape route out of it? Hope this helped!