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05 — Lock replacement

Lock Replacement North Melbourne

Replacing a lock is straightforward work with one non-negotiable first step: establishing what the existing door, frame and hardware will actually accept.

Modern apartment building entrance door with an intercom panel and access reader
Architectural reference image

A replacement removes the existing hardware and fits new hardware in its place. It is the appropriate response when a mechanism is worn past adjustment, when a lock has been damaged in a way that affects how it holds, when parts are no longer obtainable, or when the hardware is not suited to how the door is used.

Where it goes wrong is almost always compatibility. A lock that suits one door may not suit the one next to it, and discovering that after the old hardware has been removed is the wrong time to find out.

Why locks may be replaced

  • The mechanism is worn beyond what adjustment or servicing can correct.
  • Physical damage has affected the lock case, faceplate or how the lock holds in the door.
  • Components or parts are no longer obtainable for older hardware.
  • The hardware was never well matched to the door or its level of use.
  • The door has been altered, rehung or replaced and the original hardware no longer suits it.
  • Access requirements have changed in a way that rekeying alone cannot address.

Compatibility

Compatibility is determined by measurement, not preference. The relevant factors include door thickness, whether the door is timber, aluminium or a manufactured door set, the stile width on glazed doors, the existing preparation in the door, the backset and centres of the current hardware, and the condition of the frame and keep.

The practical consequence is that some replacements are like-for-like and take very little time, while others require additional preparation. Establishing which situation applies is part of the assessment.

Existing door hardware

Locks rarely sit in isolation. A front entry may carry a mortice lock, a separate deadbolt, a security screen door with its own lock, and a handle set that is cosmetic rather than functional. Each of those is a separate decision, and replacing one can affect how the others behave.

It is also worth deciding at the outset whether the aim is a single key across multiple locks or separate keys. That is easier to arrange when hardware is being replaced than to retrofit later, though what is achievable depends on the specific products involved.

Residential situations

In houses, the most common replacements are entry doors where a period mortice lock has reached the end of its life, and rear or side doors where hardware has weathered. In apartments, the apartment door itself may form part of a fire-rated door set, so hardware cannot be substituted freely and compatibility has to be established before anything is changed.

Communal entrances are a building matter rather than an individual one — see the residential locksmith page for how that is handled.

Commercial situations

Commercial replacements are driven by duty cycle. A door used hundreds of times a day needs hardware selected for that pattern, and interacting components — closers, push bars, latches — need to work together rather than against each other.

Doors that are part of base building fabric frequently sit within requirements determined by the building and its documentation, including egress arrangements and hardware specified as part of a door assembly. Those are checked against the building's own documentation rather than assumed. More detail on the commercial locksmith page.

What customers should consider

  • Whether the problem genuinely needs replacement, or whether a repair or rekeying would resolve it.
  • How the door is actually used — frequency, who uses it, and whether it is exposed to weather.
  • Whether one key across several locks is wanted, and whether the hardware allows it.
  • How many keys are needed and who will hold them.
  • For apartments and commercial tenancies, who authorises work on the door.
  • Whether other doors on the property are heading the same way and are worth looking at together.

On brands: no particular lock brand is advertised on this site, because the hardware supplied depends on the door, its requirements and current availability. What is fitted to your door will be discussed with you before the work proceeds.

Questions

Lock replacement questions

When should a lock be repaired?

Repair can be appropriate when the lock body itself is sound and the problem is a specific, serviceable fault — a misaligned strike plate, a dry or dirty cylinder, a loose handle, or a component that can be adjusted or replaced individually. Repair is less appropriate when the hardware is significantly worn, damaged, or no longer suits how the door is used.

When should a lock be replaced?

Replacement tends to make sense when a mechanism is worn beyond adjustment, when the lock has been physically damaged, when parts are no longer obtainable, or when the current hardware is not well matched to the door. Replacement is also common when a door has been altered or when access requirements have changed.

What is rekeying?

Rekeying changes the internal configuration of an existing lock so that it operates with a different key. The lock body stays on the door. It only applies to locks that are designed to be rekeyed and that are in serviceable condition, so the specific hardware needs to be checked first.

Do you work with apartment doors?

Yes — apartment entry doors are a regular part of residential locksmith work. Apartments often involve fire-rated door sets, communal entrances, intercom or reader-controlled access, and owners corporation rules. Work on a shared entrance usually needs to be arranged through building management rather than an individual resident.

Not sure which you need?

If you are still deciding, read lock repair vs lock replacement, or compare it with rekeying if the hardware is sound and only the key situation has changed. Otherwise, start a quote enquiry.

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15 Melrose St, North Melbourne VIC 3051, Australia