Locksmith in DunbartonSticking lock?Worn key? Sorted.

That is the most common version of a lockout, and there is a routine for it. Tell the locksmith on the phone so the plan is agreed before arrival. Often a neighbour can confirm you live there, a digital copy of a lease or bill is on your phone, or a property manager can vouch for you. Where none of that is available, the locksmith opens the door and completes the identification check with the documents inside before leaving.

Often fatigue, though not the only cause. A brass blade is weakest where the deepest cut leaves the least metal, and thousands of turns can slowly work a crack into that spot. Then one morning something asks more of it: a frozen cylinder, a bolt binding in a swollen door, grit in the keyway, or turning before the key was fully in. A bent, worn or poorly cut key can also fail on its own, with no such trigger. The lock is inspected afterwards to find which applied.

A large one. Factory strike and hinge screws are usually short enough to grip only the jamb, a piece of trim about an inch thick. Three-inch screws pass through the jamb and the gap behind it into the stud, so a blow has to move the wall rather than the trim. Lock manufacturers supply reinforcement plates with three-inch screws for exactly this reason, and note that a door beside a sidelight needs a different arrangement because glass sits where the stud would be.

Rekeying keeps your existing deadbolt or handle set and gives it a new key, commonly by changing the pins inside, though some cylinders reset a different way. Replacing removes the whole lock or cylinder and fits new hardware. Rekeying suits locks that are in good condition and simply need a fresh key. Replacement is the better call for hardware that is worn or damaged, built to a low grade, on a keyway the other doors cannot share, or due for a change of style or a keypad.