

Commercial · St. Agatha
Commercial-Grade Lock Replacement in St. Agatha
A new tenant moved into the unit next door, and the property manager just found three different cylinders on three doors, none of them cut to the same key.
In plain words
Fire separations and exit routes add a layer that a house entry door never has, and this service is where that layer gets handled properly. A door that forms part of a fire separation needs hardware listed for that door's rating, and a door on a required exit may need to open with a single motion and no key once the building's occupant load crosses a threshold. The locksmith checks whether either condition applies to this specific opening, selects hardware that satisfies it, and installs the new lock so the door still closes and latches the way a fire-rated or exit door is required to.
How the visit goesA new tenant moved into the unit next door, and the property manager just found three different cylinders on three doors, none of them cut to the same key.
Commercial-Grade Lock Replacement
How the visit goes


Reading the door before the lock
The door tells the locksmith what kind of hardware it can even accept. A hollow-metal or solid wood door with a mortise pocket cut into the edge takes a mortise lock body; an aluminum storefront door with a narrow stile takes a purpose-built narrow-stile lock or hookbolt; a standard cylindrical bore takes a heavy-duty lockset sized to that hole pattern. Handing, swing, backset and existing strike location are measured so the replacement drops into the prep that is already there rather than requiring the door itself to be re-cut.
Fitting the new lock body or lockset
The new hardware is installed into the existing prep, with the lock body or lockset, strike and any reinforcing plate seated so the door closes without binding. On a narrow-stile storefront door, the hookbolt or deadlatch is aligned so it engages the keeper across its full travel rather than catching on one edge. On a mortise-prepped door, the case is fitted so the trim sits flush and the spindle and cylinder line up with the existing holes cut for them.
A storefront that closes the way it should
For a narrow-stile or glass storefront door, the finished job means the hookbolt or deadlatch engages fully across its travel every time, without the shoulder-check that a worn or mismatched lock used to need. Staff closing up for the night can throw the lock once and trust it caught, and the business is no longer relying on a habit of double-checking a door that should simply work. The hardware's finish is also suited to public-facing use, holding its appearance under daily handling.
Commercial-Grade Lock Replacement
In the van
Strike plates and keepers
Narrow-stile storefront lock
Heavy-duty cylindrical lockset
Key cutting and coding machine
Mortise lock body

Commercial-Grade Lock Replacement
What affects the quote
Number of doors involved
One entrance is the simplest case. Bringing several doors, or several branch locations, onto matching hardware or one key system in the same engagement is priced across the whole set rather than door by door in isolation.
Number of keys cut and issued
Keys are counted individually into the quote. A small office needing a handful of keys is a smaller line item than a multi-shift operation issuing keys to a large staff roster.
Keying complexity
A single stand-alone cylinder is the simplest keying job. A master or grand-master structure spanning multiple doors, departments or locations takes more planning and more cylinders to combinate correctly, and that planning is part of the quote.
What to have ready
- Do you want a master key system, an interchangeable core, or a stand-alone lock?
- Do other doors on the property share a key with this one?
- Do you have a record of the current keying or key-control log?
Commercial-Grade Lock Replacement: questions
QuestionsWhat happens to keys held by former employees or contractors?
Once a cylinder is replaced or rekeyed, any key that was not reissued for the new combination simply stops working on that door. This is the direct answer to a key that walked out with someone who left the business, and it is worth doing across every door that key used to open, not only the one that prompted the call.
Does an electric strike need to match a specific lock function?
Yes. An electric strike has to suit the latch or deadlatch type it will receive, the door's handing and swing, and whether the application needs fail-safe or fail-secure operation, meaning whether the door should unlock or stay locked if power is lost. Choosing a strike without checking these against the mechanical lock is a common reason a door releases electronically but still binds mechanically.
Do you handle interchangeable-core (IC) cylinders?
Yes. An interchangeable-core cylinder lets an authorized key holder pull the core and swap in a new one when a key needs retiring, without removing the whole lock from the door. Businesses with regular staff turnover often move to this system because it turns a rekey into a short in-house task rather than a full service call every time.
Related services

- Master Key System DesignAfter a busy shift the manager counts the keys coming back in and loses track of who still has one.
- Access Control InstallationHead office wants a record of who opens the branch and when, tied to an actual name rather than a shared code scrawled on a sticky note taped under the till.
- Panic & Exit HardwareThe fire inspector's note is blunt: the banquet hall's second exit still turns on a deadbolt, and the crowd it is rated to hold needs a door that opens under one motion, no key involved.