My house was robbed about 20 years ago, they got 20+ guns// I bought a vault door from a closed bank and cut a hole in an exterior basement wall. The add on room, 18x24, has plenty of re-bar in the walls and ceiling and is the foundation for a very nice patio.. The wife approved! A dehumidifier is always on duty and most older vaults have an acess on the inside that allows the lock mechanism to be unlocked, easily.. Mine also has a set of key locked doors that allow easy acess during the day when I'm home. They're down for painting now but will get rehung. The big door is closed and locked when we leave.. There is a I-beam running the 24 foot length and it's foam insulated.. Best of all,,it's not full yet!!