When you’re shopping for a vault door, the most important thing to consider is the door’s primary purpose. Do you want to protect against fire? Are you creating a strong hold for firearms? Will the room serve as a panic room?
Vault doors come with different fire ratings and security features. Generally speaking, you want a vault door that’s at least ½-inch thick. That being said, the thicker the door, the more fire resistant it tends to be. For those worried about fire resistance, a thicker door with more fireboard offers a higher fire rating.
The door thickness and gauge of steel is also important for burglary protection and personal safety. And not to be overlooked are the locking bolts. These should extend into the door and the vault wall.