Sound familiar?Cootes Paradise
- The call
- The kitchen delivery door gets shouldered open more than a hundred times a shift, and lately the latch slips past the strike plate instead of catching it on the first push.

At closing time the hookbolt on the storefront door catches the keeper only on the second or third try, and one employee has started giving the door a shoulder to force it home.
Where a home lockout is mostly about getting one door open again, a commercial lock replacement is mostly a decision about a system: how this one door's hardware fits into every other lock the business already manages. The locksmith examines the existing keying, whether cylinders are standard, interchangeable-core or restricted, and whether other doors should be keyed the same way as this one. New hardware is chosen to match the door's fire rating and occupant load where those apply, installed without altering the door's existing prep, and finished with keys cut, tested and recorded in the business's own key-control log.
Sound familiar?Cootes Paradise
Commercial-Grade Lock Replacement · Cootes Paradise

Scene 1
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.
Scene 2
With the assessment complete, the locksmith orders hardware to match: a mortise lock body for a mortise-prepped door, a heavy cylindrical lockset for a standard bored door, or a narrow-stile lock or hookbolt for an aluminum storefront. Where the door is part of a fire separation or a required exit, the hardware chosen is listed for that rating and function rather than a general-purpose substitute. Grade and finish are matched to the traffic the door takes, so a heavily used delivery door gets hardware built for that duty rather than the lightest option available.
Scene 3
Where the door forms part of a fire separation or a required exit route, the new hardware is listed for that use and the door has been tested to confirm it still closes and latches on its own. Any push-type release hardware installed to meet an occupant-load threshold has been checked across the whole route it serves, not just at the one door where the call started. The business leaves with an opening that satisfies the condition that triggered the work, rather than a lock that merely looks similar to what was there before.
What shapes the quoteBuchanan Lock Services
FeesSame any hour
A grand-master system adds a layer above a standard master key, useful for a business with several buildings or departments where one senior key should open everything and mid-level keys should open only their own area. A single-location business with a handful of doors usually only needs a straightforward master and change-key structure, without the extra layer.
Yes, that is usually the first decision made. The locksmith checks whether your doors already run on a master or grand-master system, an interchangeable-core setup, or a restricted keyway, and orders replacement cylinders that slot into whichever structure you want to keep or move to. Bringing a new door onto an existing system is generally simpler than starting that door on its own.
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.
HamiltonOntario
Commercial-Grade Lock Replacement · Hamilton, Buchanan, Central, Chedoke Park, Corktown, Hamilton Beach, Hopkins Court, Hopkins Survey, McDonald Court, North End, University Gardens, Waterdown, West Hamilton, Westdale, Pleasant View Survey
Every square is one home in a hundred.
On-site assessment
At closing time the hookbolt on the storefront door catches the keeper only on the second or third try, and one employee has started giving the door a shoulder to force it home.
(289) 203-1527, open 24/7.
On-site assessment preferred · (289) 203-1527, open 24/7