Quick answer
Most misaligned kitchen cabinet doors come right in about ninety seconds with a Pozidriv screwdriver and three adjustments on the European hinge: the front screw on the hinge arm slides the door sideways (roughly ±2mm of overlay), the rear cam screw pulls it in or out (about +3mm/−2mm), and a cam on the mounting plate lifts or drops it (about ±2mm, or ±3mm on a slotted plate). Set the side first, then the height, then the depth, judging each door against the one beside it. Adjustment stops working at one point: when the mounting plate screws have stripped their holes in a chipboard carcass. If a door drifts back out of line within a fortnight, the plate is moving under load — a carcass repair, not a hinge repair.
Key points
- A European hinge has no wearing pin and nothing in it stretches, so a door hung straight cannot sag on its own — if it has drifted, a fixing has moved.
- The three adjustments are side (front screw on the arm, ±2mm), height (a cam on the mounting plate, ±2mm) and depth (rear cam screw, +3/−2mm) — Blum's published CLIP top figures.
- Work side, then height, then depth, one door at a time, referenced against its neighbour: chasing a door against the benchtop walks a run out of square.
- The fortnight test settles it: if the adjustment holds it was a setup problem; if the door comes back out, the plate screws have stripped and nothing will hold.
- A stripped plate in a sound 18mm particleboard gable takes a glued dowel and a re-drill, but if the board has swollen from a leak the gable is finished.
Three screws move a door in three directions.
Stand in front of almost any ten-year-old kitchen in Flat Bush and you can pick the dishwasher without opening a door. The doors flanking it sit a couple of millimetres low, and the gap between them has gone wedge-shaped. Everyone calls that a sagging door.
It isn't sagging, and that distinction is the whole article. A modern door hangs on a concealed European hinge: a 35mm cup bored about 13mm into the back of the door, a steel arm, and a mounting plate screwed to the gable. Nothing in it wears. Nothing stretches. So a door that has gone crooked hasn't sagged — something moved, and it's usually the small screws holding the plate into chipboard. Adjustment brings it back into line. Whether it stays there is the only question.
Read the gap before you touch a screwdriver
Close every door and step back two metres. You're reading the reveals — the vertical gaps between doors. A gap that stays parallel but sits in the wrong place means the door just needs moving: one minute with a screwdriver. A gap that tapers means the door is rotating around one hinge. Proud of its neighbours is depth. Rubbing mid-swing is overlay.
Then the physical test, which most people skip. Open the door to ninety degrees, take the free edge by the handle and lift gently. Any clunk or play and a fixing has let go — this isn't an adjustment job. Watch the plate: if it rocks under thumb pressure, or there's a halo of pale chipboard dust on the shelf below, you have your answer before you've turned a screw. And if both doors on one carcass are out the same way, the box has racked. Hinges don't fix cabinets.
The three screws, in the order that works
Every mainstream hinge — Blum, Hettich, Grass, Titus — gives the same three axes, and Blum publishes its travel, so use that as the reference. Order matters. Side first, because overlay decides where the reveal lands. Height second, against the door beside it. Depth last: Blum's factory gap between the back of the door and the gable is 1.5mm. Half turns, one door at a time. And if you run an adjustment to its stop and the door still isn't right, stop turning — that travel absorbs tolerance, not a fixing that has failed.
Why it's always the run beside the dishwasher
Melteca — the melamine-faced board most Auckland carcasses are built from — is a melamine surface on a particleboard or MDF core, made by Laminex at Hamilton. The face is hard-wearing. The board behind a screw hole is not. Particleboard takes on water fast and swells, and the glue binding the chips softens. A gable that's taken a slow dishwasher weep has board around the plate screws that swelled, then dried back crumbly. The screws are still in the hole. They're just not in anything.
Which is the argument for the moisture-resistant grade in wet zones. Melteca comes on MR particleboard and MR MDF, and the research on screw withdrawal is consistent: MDF holds a screw better because it's denser. One schedule line decides whether you're back in five years — the same logic behind which materials actually survive a rental.
The line where adjustment stops working
Here is the test, and it costs nothing. Adjust the door properly, write the date on a strip of masking tape, stick it inside the cabinet, and come back in a fortnight.
Still in line? It was a setup problem — the door was never quite right, or its neighbour got adjusted and it didn't. You're finished. Back out of line? The adjustment didn't fail. It held perfectly. The plate moved.
That distinction matters, and almost nobody makes it. Once the plate screws have crushed their way through the chipboard, every close of that door lands a small impact on a fastener with nothing left to grip. The plate rocks a fraction, the door drops a fraction, the hole widens. You wind the height cam up a millimetre. Two weeks later you're winding it again. You're re-timing a fastener that's losing grip, and that loop ends one way. On a rental, name it early: it's the difference between a maintenance line item and a capital one across a portfolio you're actually running.
If I adjust the same door twice on one visit, I stop adjusting and take the plate off. The screwdriver isn't the tool that's needed by then.
If it comes back, it was never the hinge.
Fixing a stripped plate properly
The repair is straightforward, and it isn't a hinge repair. Take the door off — on a CLIP hinge you release the lever under the arm and it lifts away without a screwdriver. Unscrew the plate. Drill the failed holes out to clean, sound material, usually 8mm or 10mm. Glue a hardwood dowel in with PVA and let it cure overnight, not twenty minutes: a green glue line under a door shut forty times a day is a slower version of the same failure. Trim flush, drill a pilot, re-fix, clip the door on.
Three things kill that repair:
- The board crumbles as you drill the dowel hole. You're in blown material, and a dowel glued into wet Weet-Bix holds nothing.
- There isn't enough meat left. A gable is 18mm, and if the failure has spread across two of the four fixings you're repairing a repair.
- It's a pattern, not an incident. One stripped plate is a maintenance visit; every plate on the sink run is a message about the carcass.
A third hinge shares the load — Blum's guidance is two hinges for doors around 4 to 6kg and three from 6 to 12kg on widths up to 600mm. But it needs a new 35mm cup bored in the door, and boring a cup in an installed door you can't replace is a bad bet: fine on plain melamine, risky on 2-pac. That's already the new doors versus a new kitchen conversation.
What goes wrong
Adjusting the wrong door is the big one. One door is out, so the owner adjusts its neighbour to match, then the next to match that, and by Sunday afternoon the run has been walked out of square with no reference left. Fix one door to something that hasn't moved — the end door nobody's touched — and bring the rest to it.
Then there's blaming the hinge for something else. A door that slams instead of soft-closing usually isn't misaligned: Blum's BLUMOTION damper can be switched off on one hinge for small or light doors, and the door must be closed once for the deactivation to take. A door under-hinged from day one has been overloading its plates for years — a spec fault presenting as a maintenance fault, which is why the hardware details are worth arguing about upfront.
The last is a purchasing decision, not a maintenance one. Screw withdrawal in board is a function of density, gauge and embedment depth — thinner board and shorter fixings hold less, which is arithmetic, not opinion. If a kitchen is stripping plates at five years, the real comparison is flat-pack against made-to-measure.
| What you see | What it usually is | What fixes it | DIY or callout |
|---|---|---|---|
| Even gap, door sits a little low | Never set at handover | Height cam on the plate | DIY — ninety seconds |
| Reveal tapers, wide at the top | Door rotating on a loose top plate | Re-fix the plate, then adjust | DIY if the board is sound |
| Door drifts back out in a fortnight | Plate screws have stripped | Dowel and re-drill — a carcass repair | Callout |
| Plate rocks; chipboard dust below it | Board crushed or swollen | Dowel if sound; new gable if blown | Callout |
| Both doors on one cabinet out the same way | The carcass has racked | Level and pack the cabinet | Callout |
| Door slams instead of soft-closing | Damper off, or too few hinges | Re-activate the switch, or add a hinge | DIY, then a spec review |
What to establish before you call anyone
- Does the plate rock against the gable under thumb pressure? Then it's a fixing problem, and no screwdriver settles it.
- Pale chipboard dust or a dark stain under the plate? Dust means movement; stain means water, and water means the board.
- Has the door been adjusted before, and how long did it hold? A fortnight is diagnostic. Two years isn't.
- Only the dishwasher and sink cabinets, or the whole kitchen? One is a repair. The other is a replacement.
- Ask what the warranty covers: adjustment inside the defects period usually is, a stripped plate four years on generally isn't, and the fine print rewards reading before you need it.
Frequently asked questions
Which screw on a kitchen cabinet hinge moves the door up and down?
On a European hinge it usually isn't a screw on the hinge at all — height lives on the mounting plate screwed to the gable. A cam plate gives roughly ±2mm from the cam screw; a slotted one-piece plate gives about ±3mm, loosened, slid and re-tightened. The arm screws do side (the front one, ±2mm) and depth (the rear cam, +3/−2mm). If you're hunting for a height screw on the arm, that's why you can't find it.
Why does my cabinet door keep dropping even after I adjust it?
Because the adjustment isn't failing — the mounting plate is moving. A concealed hinge has no pin to wear and nothing that stretches, so once set it stays set unless a fixing lets go. When the plate screws have crushed their holes in a chipboard gable, every close works the plate a fraction further and the door drops again. The timeframe is the tell: an adjustment holding for years was a setup issue; one back in a fortnight is a carcass issue.
Can a stripped hinge screw hole in a chipboard cabinet be repaired, or does the cabinet need replacing?
If the board around the hole is dry and sound it repairs well: take the door off, unscrew the plate, drill the failed holes out to clean material, glue in a hardwood dowel with PVA, leave it overnight, then re-drill a pilot and re-fix. That repair will generally outlast the kitchen. It only fails where the board has swollen from a leak — if the gable crumbles as you drill, there's nothing to glue to. One stripped plate is a maintenance visit; a whole sink run is a replacement.
In a rental, is a misaligned cabinet door the landlord's cost or the tenant's?
Tenancy Services frames it around fair wear and tear — the gradual deterioration of things used regularly in a property — and landlords must keep a property in a reasonable state of cleanliness and repair, with what counts as reasonable depending on the age and character of the place. A hinge plate worked loose over years of normal use reads as exactly that. Careless damage is different: a tenant's liability is capped at four weeks' rent or the insurance excess, whichever is lower. Either party can issue a 14-day notice to remedy, so photograph it and check tenancy.govt.nz.
How many hinges does a tall pantry door need?
Blum's published guidance is two hinges for doors of roughly 4 to 6kg and three for 6 to 12kg, based on widths up to 600mm, with an extra hinge once the door goes wider. Handles count towards the weight, and Blum notes tall narrow doors are worth three hinges for stability even where weight alone wouldn't demand it — a full-height pantry door on two hinges is a plate-stripping machine. Get the count right on the drawing: free then, expensive later.
When it's worth a callout, and when it isn't
Be honest about which problem you have. One door, one plate, sound board around it: a maintenance visit, one of the cheapest things anyone will do in your kitchen. A door never right since install, still inside its defects period: a call to whoever fitted it. But a rental where the sink run and the dishwasher gable have all gone, and you've adjusted the same doors twice — you're keeping a dead kitchen upright. A replacement for a standard unit starts in the lower five figures plus GST supply and installed, materially cheaper over a five-year hold than four callouts and a tenant who doesn't renew.
We build kitchens in our own workshop in East Tamaki and we do maintenance — it's in the name, and it's why the same three failures turn up across two thousand-plus kitchens. Send photos: the reveal from a metre back, the plate with the door open, the bottom edge of the gable. Units to do? Send the count and a rough scope. A trade-priced number comes back inside 24 hours, supply and install under one contract, one invoice. And if it's three screws and a Pozi driver, we'll tell you that instead — the same reason we check a kitchen before handover the way we do.