24/7 · CF10 · DBS checked engineers
Lock Installation in Cardiff
Lock Installation throughout Cardiff, 24/7, any day of the year — average response 22 minutes. Free call-out with every job — fixed price agreed before any work starts.
Other locksmith services in Cardiff need lock changes, repairs, upgrades or commercial help instead?
All services in Cardiff →Door preparation on southern Victorian terrace stock must account for lime-mortar frames: Bath pre-1840 townhouses use lime rather than Portland cement, which means the rebate face is softer and more susceptible to damage from aggressive prep. We dress lime-mortar frames with hand tools only and avoid powered chiselling that could cause vibration damage to the surrounding mortar joints.
On the day
Fitting day in Cardiff — the five-step sequence
New locks go in against a defined sequence, not ad-hoc. Here's the order each of our engineers works through on a typical Cardiff installation — the same on a terraced front door as on a new-build UPVC back door.
- 01
Confirm parts and measurements
Before any tools come out we walk through the hardware that's been ordered for your Cardiff property — cylinder sizes, gearbox type where relevant, strike plate dimensions, and any fire or insurance ratings. If something's a size off, we reschedule rather than force the fit.
- 02
Prep door and frame
Existing furniture is removed, the door checked for square and for any swelling or drop on the hinges. On older CF10 stock the frame often needs a chisel adjustment at the keep; on new-build doors it's usually a clean lift and drop. Anything structural that's out of scope is flagged before we go further.
- 03
Fit the hardware
Cylinder, gearbox, multipoint strip, or mortice case goes in against the manufacturer's template. Fixings match the frame material — steel screws into softwood, self-tappers into aluminium, no-slip fixings into composite. Nothing is over-torqued; we measure Bath aperture in both imperial and metric before any fixing is committed to final torque.
- 04
Align and test
Every operation is tested with the door both open and closed — key in, key out, handle lifted, deadlock thrown, thumb-turn from inside. On a multipoint we test each hook and shoot-bolt independently before signing off. Anything that binds gets adjusted there and then, not "later".
- 05
Handover and keys
Keys are counted against the job card and handed over with a one-page written summary: what was fitted, the imperial case dimension spec noted, serial numbers where relevant, and a seven-day follow-up window. On insurance-graded installs the compliance paperwork lands by email the same day.
What we measure
Four measurements that decide the fit in Cardiff
Imperial aperture measurement: record aperture height and depth in both inches and millimetres. Compare against the metric BS3621 replacement case body. If no direct fit exists, source a pre-metric case from a heritage hardware supplier. Both measurement systems recorded on job card.
-
Door thickness
44 / 54 / 70 mm
Determines whether the standard cylinder length fits flush or needs a long-body variant.
-
Backset
45 / 60 / 70 mm
Distance from the edge of the door to the centre of the cylinder. Common on UK doors but not universal.
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Euro cylinder length
30/30 → 45/55
Measured separately from each side of the door. Must sit flush — too proud and the cylinder is vulnerable to snapping.
-
Frame material
Timber · Composite · Aluminium
Cardiff stock varies widely. Frame material dictates fixings, strike plate type, and the correct spec for the imperial case dimension.
- Georgian and Regency Bath apertures sized before 1850 use imperial proportions that do not correspond to any standard metric case — measure in both systems before ordering.
- Imperial forend recess in an early Bath door may be narrower than a standard 20 mm metric forend — confirm the recess width before ordering a metric replacement.
- Pre-metric case sourcing: Chubb and Union produce BS3621-compliant cases in imperial body dimensions for heritage applications.
Pricing — what shifts it
What affects a Cardiff lock installation price
Brighton Regency and early Victorian terraces combine narrow stileproportions with highly ornate door furniture that the owner frequentlywishes to retain. The mortice position must accommodate the existingknocker, knob, and letterplate geometry. Compatibility assessment is partof the survey visit and does not add to the quoted price. From £59.
- 01
New-fit vs like-for-like replacement
Fitting into an existing cut-out is cheaper than routing a new one. Period doors in Cardiff often need a fresh cut; UPVC is almost always like-for-like.
- 02
Hardware tier
Standard cylinder sits at the base price; TS007 3-star anti-snap, BS3621 mortice, and restricted keyways each add to the parts cost.
- 03
Door condition
A square door on tight hinges fits fast. Drop at the hinge side, swelling, or a warped strike plate adds time — we flag this during the measurement call, not at the end.
- 04
Number of doors on the same visit
Fitting front, back, and garage side-door in one appointment is meaningfully cheaper than three separate visits across Cardiff.
Lock Installation in Cardiff — FAQ
Common questions about lock installation in Cardiff.
Can you install a lock on a brand-new door?
Cardiff Victorian terraces include properties with Welsh lime mortar andslate-hung elements that resist drilling differently from standard brick.Where the frame involves lime mortar at the rebate, the fitting approach isadjusted to avoid cracking the mortar joint. Frame material is assessed onarrival. Yes — this is one of our most common installation jobs in Cardiff. Carpenters and joiners often hang the door and leave lock fitting to specialists. We measure the rebate, chisel for a BS3621 mortice case, fit the strike plate, and test through a full key cycle. Finished work looks factory-fit.
Do I need BS3621 on a new installation?
For external doors on Cardiff homes with standard insurance — yes, almost certainly. BS3621 is the minimum most UK home insurers specify on final-exit wooden doors. We fit BS3621 as standard and issue written paperwork confirming the standard for your insurance file.
Can you keyed-alike multiple new locks?
Yes — if you want one key to open your front and rear doors, we supply keyed-alike cylinders on the most common profiles. Arrange at the survey stage so we bring matching parts. This works cleanly on UPVC euro cylinders and on certain mortice profiles.
We've just moved into a new-build in Cardiff — do the locks already meet insurance standards?
Not always. Many Cardiff new-builds come with entry-level euro cylinders on UPVC or composite doors that lack the TS007 3-star anti-snap rating, and sometimes a mortice case that predates BS3621 on the side door. We survey the whole property, identify any hardware gaps, and upgrade to compliant standards on the same visit — with a compliance pack for your insurer.
Also nearby
Areas near Cardiff
we also cover
Our engineers don't just cover Cardiff — we serve the surrounding towns and neighbourhoods too. If you're just outside Cardiff, we can still reach you fast.
- Newport 12.1 mi
- Penarth 3.8 mi
- Barry 9.4 mi
- Pontypridd 11.7 mi
- Caerphilly 7.3 mi
Ready when you are
Need lock installation in Cardiff now?
24/7 dispatch across Cardiff and the CF10 area. Fixed quote before work starts. Free call-out with every completed job.