Sound familiar?Cobourg
- The call
- The old deadbolt has grown lazy. You turn the thumb-turn and the bolt creeps out halfway, then needs a second push with the door pulled tight. Some mornings the key has to be jiggled before it will come back out.

You moved in three weeks ago. The previous owner left a handful of keys, none labelled, and the bolt on the side door rattles in its housing.
The right deadbolt for a door depends on how the door is used and where it sits. A front door that a family goes through twenty times a day needs a durable mechanism and a finish that shrugs off salt spray and sun; a side door in a laneway wants a heavy bolt and a strike that reaches the framing. Residential deadbolts carry letter grades for security, durability and finish, and heavier commercial-pattern bolts carry numbered grades, so there is a plain way to compare. The locksmith talks through those options, then fits the one you choose with the same care whichever grade it is.
Sound familiar?Cobourg
Deadbolt Installation · Cobourg

Scene 1
Glass changes the conversation about which deadbolt to fit. A pane in the door or a sidelight within an arm's reach of the lock means an inside thumb-turn could be reached by breaking the glass, which is why double-cylinder deadbolts are sometimes suggested. The locksmith measures the distance from the glass to the lock, notes whether it is tempered, laminated or plain, and lays out the options: a captive thumb-turn that needs a key only when you choose, a laminated pane or a tested security film that can delay an arm, or moving the bolt height. The aim is a door that keeps a stranger out and still lets everyone inside leave with one turn of the hand.
Scene 2
The outside housing goes on first, with its tailpiece threaded through the slot in the bolt cam and its mounting posts through the matching holes. Any plastic alignment bracket that ships with the lock is used on a 54 mm bore and removed on a smaller one. The inside thumb-turn plate is set against the door and the two long tapered screws are driven through it into the outside housing, snug rather than crushed, so the housings pull tight to the door without distorting the mechanism. The locksmith turns the thumb-turn before the door is closed to confirm the bolt throws its full length and returns without a catch.
Scene 3
Behind the new strike plate is the part of the job you cannot see and will never need to think about. The pocket has been bored deep enough for the bolt to seat fully, the plate has been let into the jamb so it sits flush, and the long screws reach through the jamb into the framing behind it. On a door that had been forced or had stripped screw holes, a full-length reinforcer may sit under the strike. If you press the jamb with your palm now, it does not flex. That stiffness is what a bolt needs to do its work, and it is the reason the installation took as long on the frame as on the door.
What shapes the quoteCobourg Lock & Key Co.
FeesSame any hour
A replacement into existing holes is generally the shorter visit, and boring a fresh door with a new strike takes longer, roughly an hour or two per door including the frame work and testing. Steel doors, keying alike, frame repairs after a forced entry and fitting a jamb reinforcer each add time. The locksmith can give a realistic estimate once the door and frame have been looked at.
The usual position is 140 to 150 mm above the centre of the knob, which lines the two locks up and keeps both within one reach. Manufacturers' templates assume that spacing, which helps a later keypad or handleset line up, though many handlesets still need their own lower hole drilled to that model's template. The height is nudged if it would land on glass, a decorative panel or a hollow spot inside an insulated door, and to make sure the frame behind it is solid.
Yes, on nearly any wood, steel-clad or fibreglass entry door. The locksmith marks a spot above the knob, clamps a jig to the door and bores a cross hole through the face and a smaller hole through the edge, then cuts a pocket and fits a strike on the frame. The main things checked first are the door's thickness, what is inside it at that height and whether glass sits close by.
NorthumberlandOntario
Deadbolt Installation · Alnwick/Haldimand, Brighton, Cramahe, Hamilton, Gosport, East Colborne, Coverdale, Norham, Codrington, Orland, Smithfield
Every square is one home in a hundred.
On-site assessment preferred · (289) 677-1674, open 24/7