Quick answer
Modern composite door hinges offer three-way adjustment — vertical, horizontal and compression — each controlling a different aspect of fit. Getting the sequence and increments right, and understanding how the three interact, is what separates a lasting professional adjustment from a temporary fix, which is why this is a job we recommend leaving to a qualified technician rather than attempting yourself.
Overview
Modern composite door hinges have 3-way adjustment: vertical (up/down), horizontal (in/out on the reveal), and compression (in/out towards the frame). Each cam is usually a 4mm or 5mm Allen key.
Symptoms
- Any alignment issue.
Common causes
- Drop, movement, wear.
The three adjustments, and what each one actually does
Vertical adjustment controls how high or low the door hangs in the frame, correcting drop at a hinge and re-levelling the whole slab. Horizontal adjustment controls how far in or out the door sits relative to the frame reveal, correcting a door that's too tight against the frame on one side or too loose on the other. Compression adjustment controls how firmly the closed door presses onto the weatherseal, which affects both draught-proofing and how much resistance you feel when locking.
These sound like three independent controls, but on a real door they interact constantly — moving the vertical cam on one hinge changes the horizontal relationship at the opposite corner of the door, because the whole slab pivots and shifts as a single rigid unit. Understanding that interaction, rather than the location of each cam in isolation, is what a genuine adjustment skill consists of.
Why this needs to be a calibrated, sequenced job
A professional adjustment starts with a full reveal measurement at four points around the door before any cam is touched — establishing a baseline rather than guessing at the fix. From there, corrections are made in a specific order (vertical first, then horizontal, then compression) because getting the sequence wrong means correcting a symptom that then shifts again once the next adjustment is made.
Every change is made in small increments — often a quarter-turn or less — with the door's swing and lock tested after each one. This iterative, test-as-you-go approach is standard trade practice precisely because hinge cams have a limited working range, and pushing one too far in an attempt to correct a bigger problem simply strips the mechanism rather than fixing anything.
- Baseline measurement first — four points, compared against the manufacturer's target reveal.
- Vertical, then horizontal, then compression — in that order, never reversed.
- Small increments only — each cam has a working range of a few millimetres at most.
- Test the lock after every single adjustment, not just at the end.
Why different hinge brands change everything
There is no single universal composite door hinge — different manufacturers (and different door brands using the same hinge supplier under license) use different cam layouts, different Allen key sizes, and different adjustment ranges. A technician needs to correctly identify the hinge brand before touching anything, because assuming one brand's cam layout applies to another is a common cause of accidental over-adjustment.
This variability is one of the main reasons DIY attempts, sourced from a general online guide that assumes a single hinge type, so often go wrong on a specific door — the guide might describe the wrong cam entirely for the hardware actually fitted.
What can go wrong with an uncalibrated adjustment
The most common outcome of an incorrectly sequenced or over-forced adjustment is moving the problem rather than solving it: fixing a bottom rub by over-adjusting the top hinge, for example, often creates a new rub at the top of the door, or throws off the lock's engagement with its keeps so the door now catches or won't lock at all.
A more serious risk is stripping a cam mechanism by forcing it past its safe range, which converts a simple adjustment job into a full hinge replacement — a more expensive and more time-consuming repair than the original issue would have needed if handled correctly the first time.
Cornwall conditions that make correct calibration matter more
Because Cornish properties see wider seasonal swings from thermal expansion, more coastal humidity affecting seals, and more variable building movement on older stone properties than many parts of the country, doors here are often adjusted at, or close to, the edge of their working tolerance to begin with. That leaves less margin for error — an adjustment that would be forgiving on a sheltered inland door can tip a coastal Cornwall door the wrong way if it's not done with proper measurement and small, tested increments.
This is part of why we always take the wider context — property age, construction type, coastal exposure — into account on an adjustment visit, rather than treating every door as an identical, standard case.
What to expect from a professional adjustment visit
A typical visit starts with a conversation about the specific symptoms and when they started, followed by the reveal measurement, hinge brand identification, and a sequenced set of small adjustments with testing throughout. Most straightforward cases take 30 to 60 minutes; more complex cases involving multiple hinges or a suspected frame issue can take longer.
We always finish by testing the full lock cycle — not just the swing of the door — since alignment and locking are connected, and a door that swings freely but won't lock properly hasn't actually been fixed.
What to expect from a professional adjustment survey visit
A general adjustment visit — where a door has several minor niggles rather than one clear fault — starts with a walk-through of every symptom the homeowner has noticed, however small, since seemingly unrelated issues like a slight rattle and a stiff lock often share a single root cause. We then measure the reveal gap, check every hinge screw for tightness and elongation, test the lock cycle fully with the door both open and closed, and inspect the weatherseal along its full length before deciding on an adjustment plan, which we talk through before starting any actual work.
Hinge types you're likely to have and what each allows
Most composite doors fitted in Cornwall over the last fifteen years use one of three hinge types: exposed three-way flag hinges (the most common and easiest to adjust), concealed frame-mounted hinges (tidier in appearance but requiring more disassembly to adjust), or, on older installations, fixed butt hinges with no adjustment at all. Knowing which type you have before booking a visit — a quick photo sent over is usually enough for us to tell — helps us bring the right tools and set expectations on how much can be corrected without replacing hardware.
Guarantee and CERTASS considerations before you book an adjustment
If your door was installed within the last two to ten years, check whether your original paperwork includes a hardware guarantee, since some adjustments — particularly anything involving hinge or gearbox replacement rather than simple recalibration — may be covered at no cost if the original installer is still trading. As a CERTASS registered company we can carry out adjustment work on doors we didn't originally install, but we'll always flag if we think the work should be covered under an existing warranty elsewhere before charging for it.
Best time of year to book routine adjustment work
For a proactive check rather than a fault-driven call-out, spring and early autumn are the best windows: the door isn't at either seasonal extreme, so any adjustment made will hold well whether the following months bring summer humidity or winter cold. Holiday-let owners in particular benefit from a spring check ahead of the season and a light autumn recheck once bookings ease, catching small issues before they become guest complaints.
When adjustment alone has reached its limit
A general adjustment visit sometimes concludes that adjustment isn't the answer at all — where hinges are worn beyond their working range, the frame has moved structurally, or the door slab itself has warped. In those cases we'll always say so plainly rather than force a cam to its limit for a fix that won't last, and we'll price the actual remedy — hinge replacement, frame packing, or in rare cases a new door — separately and clearly.
Typical repair costs in Cornwall
| Work | Typical price | Notes |
|---|---|---|
| Standard single-hinge calibrated adjustment | £75–£120 | Covers most single-symptom cases |
| Full three-hinge recalibration with reveal mapping | £120–£180 | Recommended where multiple symptoms are present |
| Hinge brand diagnosis and cam identification | Included | Part of every adjustment visit |
| Hinge replacement (cam stripped or worn out) | £140–£220 | Where adjustment alone can no longer hold |
Guide prices only — we confirm the cost after seeing the door.
When to call a professional
- Cams stiff or seized.
- Adjustment not holding.
Prevention
- Don't over-tighten - cams have a limit.
