Locksmith in Scarborough Village, OntarioMaster keysfor buildings in Scarborough Village

Lock manufacturers list moving as one of the main reasons to rekey, and it is easy to see why: previous owners, their relatives, a cleaner, a dog walker and a contractor may all hold copies you know nothing about. Rekeying every exterior cylinder in one visit resets the count to the keys in your hand, and it is a convenient moment to put every door on a single key as well.

Not when it is done for that door. Steel-clad doors are cut with a fine-toothed hole saw run slowly through the skin, guided by a jig so the saw cannot skate on the smooth face, and finished from both sides so each skin stays clean. Fibreglass is scored first so the surface does not chip. Shavings are vacuumed from the foam core, and the edge is finished with a collar or plate suited to the stile inside.

The decision follows what the assessment actually finds rather than the age of the hardware alone. A cylinder that is only stiff or slightly worn is usually serviced and left in place, while one that is pitted, cracked or built to a grade unsuited to its exposure is replaced. The same logic applies to a closer or hinge: adjustment first, replacement only once the part itself has genuinely failed. You are told which category the hardware fell into and why before any work proceeds.

A keying chart is a plain list of every opening, the key group that operates it, the code stamped on those keys and the number issued. Months later it lets you answer exactly which doors a missing key opened, and it lets a locksmith add a new door to the system without changing anything else. Keep it with the key register, somewhere locked, with a copy off site.

The current chart shows exactly which doors that level was designed to reach, which for a lost top-level master can mean the whole property rather than one group. Depending on how the key was lost and who else already holds that level, the usual options are repinning the affected cylinders and reissuing keys to the remaining holders; a restricted keyway lowers the odds of an unauthorized copy being cut but is not proof that one has not been made. Without a current chart, the first task is reconstructing that scope.

A home lockout or residential rekey is usually about one door and one household's keys. Commercial-grade lock replacement more often involves a system, several doors, a master key structure, and sometimes a fire or exit rule the door has to satisfy, so the assessment, the hardware selected and the record kept at the end are all built around managing that wider structure rather than a single lock.

A proximity key usually has no blade to trace, so the process is almost entirely electronic: pairing a new fob to the vehicle's receiver and enrolling it through the diagnostic connection so the car recognizes it as an additional key. Many still hide a small mechanical blade inside the shell for emergencies, and that blade is cut separately to match the door lock, even though it is rarely used day to day.

Yes, this happens fairly often because a trunk or hatch lock gets used far less than the door locks and can seize from disuse, dust or corrosion, or spin freely if its own linkage has come loose over time.

It is uncommon but not impossible, since wafer locks have a limited number of combinations and manufacturers reuse keyway profiles across models. This is one reason manufacturers space their depth increments further apart than the lock's tolerances strictly require, to cut down on accidental matches. It is also why a locksmith reads the specific lock in front of them rather than assuming a key that looks similar will behave the same way.