Sound familiar?Toronto
- The call
- 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.

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.
Occasionally a case really is finished, with a cracked body, a bolt worn to a sliver or a hub broken in two, and the answer is a replacement that respects the door. Reproduction mortise cases are made in common vintage sizes and backsets, and a modern case with a pin-tumbler cylinder can fit many old pockets with little woodwork once its faceplate and hub also line up. The locksmith measures the case, backset, faceplate and trim spacing before ordering, aiming for the new case to drop in with your original knobs and escutcheons going back on. From the hallway, the door looks untouched; it just works.
Sound familiar?Toronto
Vintage Mortise Lock Service · Toronto

Scene 1
Standing at the open door, the locksmith looks at the narrow brass or steel plate in the door edge. Its height, the spacing of its screws, any maker's stamp, and whether it shows one bolt or two tell a good deal about what is inside: a latch-only case for an interior door, a latch and deadbolt case for an entry, or a privacy function with a turn button. The distance from the door edge to the centre of the knob, the backset, is measured, along with the spindle size. These figures decide which springs, followers and, if it comes to that, which replacement case will fit, so they are written down before the lock is disturbed.
Scene 2
Before the case goes back, the pocket and screw holes get whatever attention the check turned up. Stripped holes are drilled out, plugged with glued hardwood dowel and re-drilled so the faceplate screws bite. A pocket that has loosened is packed with a thin hardwood shim glued to one wall so the case sits tight. A split at the edge is glued and clamped. None of this changes the door's appearance; it simply gives the rebuilt lock something solid to sit in, which matters because a case that shifts in its pocket will bind the spindle and undo the bench work in a few months.
Scene 3
A serviced mortise case wants very little. Once a year, a single drop of light lock oil into the latch and the bolt from the door edge, with the faceplate screws briefly backed off if needed, keeps the levers gliding. If the lock has a pin-tumbler cylinder, that cylinder gets dry graphite or a PTFE lubricant in the keyway instead, because oil in a cylinder gathers grit and stiffens the pins. General-purpose spray lubricants belong nowhere on this hardware; they flush out the little oil that should stay and leave a film that dust settles into. The locksmith will show you where the drop goes so you are not guessing.
What shapes the quoteNorth Park Locksmith Co.
FeesSame any hour
Two causes cover most cases. Either paint has built up on the faceplate, the bolt or the strike so the bolt drags across it, or the door has dropped so the bolt is entering the strike pocket at an angle and rubbing its edge. Occasionally a bent deadbolt lever inside the case adds friction. Cleaning the paint back, adjusting the strike and checking the lever all happen as part of the service.
It reinforces the choice to service rather than replace. Where a property carries a heritage designation, changes affecting listed features can need extra sign-off, and original door hardware is occasionally among those features. A rebuilt mortise case with its original trim is preservation rather than alteration, and the locksmith's written record of what was retained and what was replaced is useful for your file.
Whether the door takes a skeleton-style bit key or a flat key in a round cylinder, roughly when the house was built, what the knob and bolt are doing, and whether the trouble is worse with the door closed. A photo of the faceplate in the door edge and one of the keyhole side is worth a great deal. Mention how many doors are involved and how many keys you would like afterwards.
TorontoOntario
Vintage Mortise Lock Service · Downsview, North Park
Every square is one home in a hundred.
On-site assessment
After a wet summer the entry door sits lower in its frame.
(289) 536-9733, open 24/7.
On-site assessment preferred · (289) 536-9733, open 24/7