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Technician using a screwdriver on the deadbolt of an open blue-gray front door, with a tool bag and screw tray nearby. — Deadbolt Installation, Tranquility

Change or rekey · Tranquility

Deadbolt Installation in Tranquility

The back door has a deadbolt in name only: a short bolt, a thin brass strike held by two little screws, and a jamb you can flex with your palm. It was fine for a builder's showing.

Call now · open 24/7(548) 900-9717

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In plain words

If your door already has a knob or lever bore and nothing above it, adding a deadbolt is a boring job in the literal sense. A jig clamps to the door at the right height, usually 140 to 150 mm above the knob centre, and guides a hole saw through the face and a smaller bit through the edge. The locksmith mortises the edge so the bolt faceplate sits flush, sets the bolt to the door's backset, then fits the cylinder outside and the thumb-turn inside. The frame is marked from the bolt itself, bored and chiselled for the strike, and the lock is tested open and closed.

Sound familiar?

The back door has a deadbolt in name only: a short bolt, a thin brass strike held by two little screws, and a jamb you can flex with your palm. It was fine for a builder's showing. It is not fine for a laneway.

How the visit goes

Deadbolt Installation · Tranquility

How the visit goes

Technician in a cap fitting a black mortise lock case into the edge of a wooden door beside an old knob plate. — Tranquility
  1. 1

    Measuring the bore and the backset

    Deadbolts are built around two dimensions. The cross bore is the large hole through the face of the door, 54 mm on most residential hardware, though some older or imported locks used 38 mm. The backset is the distance from the door edge to the centre of that hole, 60 mm or 70 mm on nearly every door in this part of the world. If a deadbolt is being replaced, both are measured so the new lock lands in the existing holes without a shim or a gap. On a new installation they are chosen to match the knob below, so the two locks line up and any future keypad or smart deadbolt drops straight in.

  2. 2

    Working on a steel-clad or fibreglass door

    Insulated doors are cut with the skin in mind. A hole saw with fine teeth is run at low speed through the metal face, with the jig doing the steering so the saw does not skate on the smooth surface, and the cut is finished from the second face to keep both skins clean. Swarf is vacuumed out of the core so it cannot work into the bolt. The edge is usually a wood or composite stile inside a folded metal lip, and the bolt is finished with a drive-in collar or a plate screwed into the stile rather than a chiselled mortise. Fibreglass is scored first so the skin does not chip, then cut the same way.

  3. 3

    A safer way out as well as a stronger way in

    With a thumb-turn inside, everyone in the household can leave through this door without hunting for a key, day or night. The locksmith walks the family through the thumb-turn and shows children how it turns. If a double-cylinder bolt was replaced, the inside key is no longer needed at all and can be retired. Where glass sits near the lock, whatever measure you agreed on, a thumb-turn that locks with its own small key, a laminated pane, or a tested security-film system that can delay an arm's reach, is in place, so security did not come at the cost of a clear way out.

In the van

  • 75 mm (3 in) strike screws
  • Sharp chisel and mallet
  • Dry PTFE lubricant
  • Reinforced strike plate
  • Manufacturer's bore template

What affects the quote

  1. 1

    Strike and frame reinforcement

    A reinforced strike with long screws is standard; a full-length jamb reinforcer, a strike box or repairs to a split jamb after a forced entry are extra items quoted on their own.

  2. 2

    Travel to the property

    Distance and access are part of any call-out: a house on a suburban street and a rural property down a long road involve different driving time, and the quote says so.

  3. 3

    Mechanical, keypad or smart lock

    Electronic deadbolts carry a different hardware line and add setup time for codes, pairing to a phone and a walk-through, all of which appear as their own entries.

Same fees day, night or weekend.

Have it ready

Before you call · 0 / 3

(548) 900-9717

Deadbolt Installation: questions

Advice · (548) 900-9717

How do I look after a deadbolt once it is installed?

Very little is needed. Each spring and autumn, lock the door from inside and feel whether the bolt still goes home without the door being pulled; if it hesitates, the door has moved with the season and a small strike adjustment restores it. Whatever lubricant the lock's own maker specifies keeps it smooth, often a dry PTFE or graphite type in the keyway and along the bolt, though some cylinders are meant to be serviced with oil. In winter, wipe road salt off the outside trim to protect the finish.

I just moved in. Should the new deadbolt be keyed to a new key?

It is a good moment for it. Nobody knows how many copies of a previous owner's key exist, so pinning the new bolt, and the rest of the exterior doors, to one fresh key retires all of them at once. Lock manufacturers list a move as one of the main reasons to rekey. You come away with a known number of keys, each tested in every door it is meant to open.

Should I choose a single-cylinder or a double-cylinder deadbolt?

For any door people leave the house through, a single cylinder with an inside thumb-turn is the sensible choice, and provincial building rules for dwellings call for exit doors that open from inside without a key. Double-cylinder bolts are keyed on both faces and are sometimes proposed where glass is near the lock, but a captive thumb-turn, laminated glass, or a tested security-film system with its specified attachment, addresses that without a key on the inside.

Brant, Ontario

Tranquility information

Town
Tranquility, Brant, Ontario
In business
17 years
Hours
Open 24/7 · nights, weekends and holidays, same fees
Visits
On-site assessment preferred. Request a visit or call.

What the census means at the door

63%

Older homes. About 63% of homes in Brantford were built in 1980 or earlier, according to the 2021 Census.

Older homes tend to have had many hands on their doors: owners, tenants, tradespeople, family. A locksmith visiting such a house pays attention to who holds keys now, and rekeying or a keyed-alike set often matters more than any new hardware.

61%

Mostly houses. Single-detached houses make up about 61% of homes in Brantford (2021 Census).

In areas of single houses, the door nobody watches is the side or back entry. It often has the weakest lock on the property. Fitting a proper deadbolt and a reinforced strike there is a modest job that closes the obvious gap.

Source: Statistics Canada, 2021 Census of Population

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Request a visit

The back door has a deadbolt in name only: a short bolt, a thin brass strike held by two little screws, and a jamb you can flex with your palm.

Call now · open 24/7(548) 900-9717
  • On-site assessment preferred
  • Same fees day, night or weekend
  • 17 years in business