
Change or rekey · Markham
Vintage Mortise Lock Service
After a wet summer the entry door sits lower in its frame. The lock works perfectly when the door is open, but with it shut you have to lift the handle and shoulder the door to get the deadbolt to throw.
Vintage Mortise Lock Service
In plain words
Keys are the part of the job people expect to be impossible, and they rarely are. A bit key, the skeleton key style used on older doors, is cut and filed on the bench to the wards and levers of your particular case, so a lost key can be replaced from the lock itself. A round cylinder on a later mortise lock is rekeyed like any modern cylinder, or exchanged for a new cylinder of matching thread and cam if it is worn out. Either way the service ends with keys in your hand that turn the original lock, and a spare made while the case is on the bench.
How the visit goesThe old skeleton key still fits the keyhole, but it now needs a jiggle, a lean on the door and a little luck before the bolt moves. Last week it took three tries. You have one key and no idea where a second could come from.
Markham
How the visit goes
The door before the lock
Before blaming a lock that may be perfectly sound, the locksmith looks at the door. With it open, the lock is cycled; with it closed, the latch and deadbolt are tried again. A lock that works open and fights when shut is telling you the door has moved. The gap around the door is checked top to bottom, the hinges are watched for a sag when the door is lifted, and the strike plate is inspected for bright wear marks where the bolt has been scraping past. In an older home with a solid wood door this is a routine finding, and correcting it is often most of the repair.
When a case is fitted new
If the old case could not be saved, the replacement is fitted to the door rather than the door to the replacement. A reproduction or modern mortise case matching the measured height, depth, backset, faceplate and hub is chosen with the goal of it dropping into the existing pocket; where a small difference remains, the pocket is trimmed with a chisel by the least amount that works, never bored out. The original knobs, escutcheons and strike are refitted wherever their spacing allows, and a new cylinder is keyed to match the rest of the house if wanted. The result reads as the original lock from either side of the door, with the reliability of a fresh mechanism.
Keys that fit the lock, and a spare
You are handed keys made to the restored lock, counted into your hand, and each one is tried in the door before the locksmith drives away. For a bit-key lock that means keys filed to your case; copying one needs the right blanks and equipment, which most hardware counters do not stock, so the locksmith keeps the record needed to make more. For a cylinder lock it means keys cut to the new combination, with any old keys now useless. Keep one spare somewhere other than the door, ideally with a neighbour or in a lockbox, and treat bit keys gently: they bend in a pocket and a bent key is how most of these locks become stiff again.
Vintage Mortise Lock Service
In the van
- Bit key blanks
- Latch and hub springs
- Cylinder set screw
- Hardwood dowel and wood glue
- Mortise cylinder and cam
What affects the quote
Same fees day, night or weekend
1Travel and access
Distance to the property and how easy it is to work at the door, on a busy entry or a third-floor walk-up, are part of any call-out and are stated when the visit is booked.
2Paint and seized parts
Hardware buried under decades of paint takes time to free and clean without damage. A faceplate, strike and thumb-turn that have to be stripped back add to the visit and are noted in the quote.
3Keying doors alike
Bringing several interior locks onto one bit key, or several cylinders onto one flat key, is extra bench work per lock and is simplest to arrange while all the cases are out on the same visit.
Vintage Mortise Lock Service: questions
What exactly is a mortise lock?
It is a lock built as a flat rectangular case that sits inside a pocket cut into the edge of the door, rather than through a round hole bored across it. The case holds the latch, usually a deadbolt, the hub the knob spindle turns, and the springs. On the faces of the door you see the knobs, decorative plates and either a keyhole for a bit key or a round cylinder. Most doors built before the middle of the last century carry one.
The lock works with the door open but not when it is closed. Is the lock broken?
Almost certainly not. That pattern means the door has moved in its frame so the latch and bolt no longer meet the strike squarely. Solid wood doors in older houses swell in humid weather and settle on their hinges over the years. The service adjusts or shims the strike and tightens or packs the hinges so the bolt throws without lifting the door, and the lock itself is usually cleaned and lubricated at the same time.
Can you make a key for a lock that has none?
Yes. A bit key is cut to the lock rather than copied from another key: the locksmith chooses a blank of the right size and files the bit until it clears the wards and lifts the levers inside your case, testing as they go. A pin-tumbler cylinder on a later lock is decoded or rekeyed and keys cut to it. Bring any loose keys that came with the house, since one may be close enough to serve as a starting pattern.
Change or Rekey Locks

- Deadbolt InstallationThe front door has a handsome lever and a keyed knob, and that is all.
- Lock Replacement & UpgradeEvery morning the front door key needs the same little dance: push in, lift, wiggle, turn.
- Smart Lock InstallationYou have just taken possession of the house and the previous owners handed over a keypad deadbolt…
Vintage Mortise Lock Service near you
Below, each lock and key service we offer in Markham gets its own page, with a description that assumes no prior knowledge. Start anywhere. Many customers arrive for a lockout and leave knowing exactly why the strike plate on the back door has bothered them for years.