Thread: "Room of stout construction"

A few thoughts.

Avoid getting burgled in the first place. No security is 100% but it also serves to slow down the burglar, they won't stay long if they have tripped a loud alarm, even if it is (probably?) unmonitored.

Two separate locks on the door separated by 1/3 of the door height is fair pry protection as a breaker would need to pry both points apart simultaneously.

A couple lever type deadlocks good, as pin tumblers are readily drilled or even picked with pick guns or bump keys -- not so with the older lever locks.

Latches, hinges, etc, throw out the 25mm long screws they often have and use 100mm long screws. It renders most inward opening doors unkickinnable.

And yes, pin and glue an MDF sheet to the face of the door. Cheap but sufficiently nasty.

Remember also, outward-opening doors have the advantage they are not readily kicked in, and they allow you to attach a "kick plate" that both covers the lock areas as well as preventing cutter access into the door/frame gap next to the locks.

Spot weld door hinge pins.

....and maybe keep your nicest guns in a secret, separate place.