Replacing locks feels like a simple job. The old lock comes out, the new one goes in, problem solved — right?
In reality, many of the security problems we’re called out to fix in Somerset West come from well-intentioned but incorrect lock replacements.
As local locksmiths working with homes, rental properties, and small businesses across the Helderberg, these are the most common mistakes we see — and how to avoid them.
Why replacing locks seems simple (and why it often isn’t)
Locks are visible, mechanical, and familiar. That makes them feel easy to replace without much thought.
What most people don’t see is:
- How the lock works with the door and frame
- How key control affects long-term security
- How environmental conditions impact performance
A lock is part of a system. Replacing one part without understanding the rest is where trouble starts.
Mistake 1: Buying the wrong type or quality of lock
Not all locks are suitable for all doors.
Common errors include:
- Using indoor locks on exterior doors
- Choosing low-quality cylinders that wear quickly
- Ignoring coastal corrosion in Somerset West conditions
A lock that looks solid on the shelf may fail early once exposed to salt air, frequent use, or misalignment.
Mistake 2: Replacing locks when rekeying would have been enough
This is one of the most expensive mistakes people make.
If your concern is who has keys, not the lock itself, rekeying is usually the better option:
- Old keys stop working
- Hardware stays in place
- Costs are lower
- Installation risk is reduced
We often see perfectly good locks thrown away when a rekey would have solved the problem.
Mistake 3: Ignoring door alignment and hardware condition
A lock doesn’t operate in isolation.
If the door is:
- Dropping on its hinges
- Swollen from moisture
- Misaligned with the strike plate
Even the best lock will feel stiff, jam, or fail prematurely. Replacing the lock without fixing alignment issues leads to repeat problems.
Mistake 4: Poor installation and DIY shortcuts
DIY lock installations often look fine — until they’re used daily.
Typical shortcuts include:
- Over-tightening screws
- Incorrect cylinder depth
- Misaligned strike plates
- Damaging the door during fitting
These issues increase wear and make locks harder to use, especially for children or elderly users.
Mistake 5: Losing control of key duplication
Security doesn’t end once the lock is installed.
Without a plan for key control:
- Keys get copied without permission
- Access spreads over time
- You lose track of who can enter
This is especially risky in rental properties, offices, and shared homes. Key control should be planned at the same time as lock replacement.
Mistake 6: Forgetting secondary access points
Front doors get attention. Everything else gets ignored.
We regularly find:
- Back doors with outdated locks
- Garages leading directly into homes
- Garden gates with mismatched keys
One weak point undermines all the effort you put into the main entrance.
Mistake 7: Not planning for future access needs
Many lock replacements solve today’s problem but create tomorrow’s headache.
Questions people forget to ask:
- What happens when staff change?
- Will tenants rotate?
- Do cleaners or contractors need access?
Without planning, you’ll end up replacing or rekeying again sooner than expected.
Mistake 8: Overlooking load-shedding and electronic locks
Electronic and smart locks are popular, but they need proper planning.
Common oversights:
- No manual override
- No backup power
- Tenants or staff not trained on use during outages
In South Africa, load-shedding turns small oversights into emergency call-outs.
Frequently asked questions
Should I replace locks when moving into a new home?
Yes. You don’t know who still has keys.
Is rekeying always cheaper than replacing locks?
In most cases, yes — if the lock is in good condition.
Can I mix different lock types on one property?
You can, but it often creates usability and key management problems.
How often should locks be replaced?
Only when worn, damaged, or no longer suitable — not on a fixed schedule.
Get advice before you change anything
Most lock replacement mistakes aren’t careless — they’re uninformed.
Before replacing locks or keys, especially after a move, renovation, or tenant change, get professional advice. A licensed local locksmith can help you decide what actually needs changing — and what doesn’t — saving you time, money, and future frustration.
