Quick answer
Rental kitchens fail in a fixed order, and rarely the order owners budget for. The soft close goes first — doors start slapping inside the first tenancy or two, which is almost never a dead damper and almost always the first sign a fixing has moved. Then the floor of the sink base swells, where a slow weep sits unreported. Then the postformed edge at the sink lifts, and that stage is terminal: the manufacturer's own care guidance says a swollen top is not repairable. Then the runners bind, from the same swelling. Edge strips lift last. Nothing wears out the way people imagine: every stage is water finding the particleboard core through a hole somebody made.
Key points
- Blum's published figure for its hinges is 200,000 opening and closing cycles, so the mechanism rarely reaches its limit in a rental — what gives out is the chipboard the plate is screwed into.
- The soft close going is the cheapest signal you will get: the kitchen telling you something moved, months before anything looks wrong.
- Laminex's Melteca data sheet says the substrate must not come in contact with any liquid, while the face is tested at two hours of steam — the finish is rated, the board behind it is not.
- The postformed radius has no glue line and is not the weak point; the raw core inside the sink cut-out is, and it takes the whole top with it.
- Most of it meets the Tenancy Services definition of fair wear and tear — the landlord's bill, not the tenant's bond.
The order never changes. Only the spacing does.
A kitchen comes out of a Papatoetoe unit on a Tuesday and is on the truck to East Tamaki before lunch. You can read one like a core sample. The doors flanking the dishwasher sit low. The floor of the sink base has a dark tide line and a soft patch you can push a thumb into. The benchtop has a hairline lift at the front of the cut-out. The drawers still run — stiffly. Same story three suburbs over.
Ten-plus kitchens a week leave the workshop, but the ones coming the other way are the better education. Twenty-three years of strip-outs says rental kitchens fail in a sequence, and one variable drives it: not traffic, not tenants, but water, and how many holes there are for it to get through. What follows is ordered by time-to-failure, not by product — the melteca galley in a unit, not the stone-and-2-pac job on the isthmus.
The part that gets tested is not the part that fails
Blum publishes its testing: tests on hinges comprise 200,000 opening and closing cycles, and it reckons a kitchen's drawers, pull-outs, doors and wall cabinets are opened and closed more than 80 times a day between them. Its TANDEMBOX drawer systems are published at 100,000. Read that cold and you would expect drawers to die before doors. They don't — the rig tests a correctly fitted hinge on a square carcass in a controlled room, and none of those conditions survives a tenancy in Ōtara. What fails is what the rig cannot simulate: a door hung two millimetres out on handover day, four screws biting into chipboard, a cabinet quietly taking on water. Cycle counts are a floor, not a forecast.
Stage one: the soft close, inside the first tenancy or two
The first failure is not a thing breaking. It is a function quietly stopping. Doors that used to pull themselves shut start slapping, and one day the kitchen is louder than it was. Nobody rings about it — no leak, no crack, nothing a tenant would put in writing. And it is usually not the damper that died: the door has drifted far enough that the damper never gets a clean bite, or the plate screws have started working in their holes. The damping is the symptom. The fixing is the fault.
So the spec decision is not a better hinge. It is standardisation: one hinge, one plate, one runner across the portfolio, so a maintenance visit carries the right parts in the van instead of booking a second trip — the same argument as getting the hardware details right before anyone orders. The rest is process: set every door at handover, and again at every turnover, complaint or not.
Stage two: the floor of the sink base
Next, the cabinet nobody looks inside. Laminex's Melteca data sheet is blunt about the material most Auckland rental carcasses are built from: the substrate must not come in contact with any liquid, and failure to keep it dry will affect the performance of the panel. Any exposed substrate must be sealed before service. Melteca is melamine pressed onto Superfine particleboard or Lakepine MDF. The surface is genuinely tough. The board is not, and was never sold as though it was.
What kills a sink base is never a burst. It is a weep: a tap tail seeping, a waste connection sweating, a hose letting go a drop an hour. Not enough to pool and get reported. Enough to keep the board damp. Particleboard takes on water fast, the chips swell, the glue softens, and the floor goes spongy from underneath while the melamine on top still looks new. By then it is finished.
The fix is one schedule line and nearly free: MR-grade board in the sink base and the dishwasher gable. Melteca comes on Superfine MR particleboard and Lakepine MRZero alongside the standard grades, and MR for two cabinets out of fifteen is a rounding error. MR through the whole run is money you never see again — the same reasoning as which materials actually survive a rental. Spend where the water is.
The face is rated. The core is not.
Stage three: the postformed edge at the sink
This is the stage that turns a maintenance line into a capital one, and the one most often described wrongly. The postformed edge is not the culprit. It is the victim.
A postformed benchtop has the laminate wrapped over the front radius in one piece: no join, no glue line, nothing at the front for water to get behind. That is exactly why it is right in a rental — the front edge is the strongest part of the top. The problem sits forty millimetres behind it: the sink cut-out, where somebody sawed a rectangle out of the panel and exposed raw core to the wettest patch in the house.
Laminex and Formica's own care guidance says it plainly: the areas around the sink, hobs and joins are vulnerable to excess liquid and are moisture resistant only, they will not tolerate water left on them for any length of time, and where it is not wiped up straight away the top will swell, is not repairable, and will not be covered by warranty. Not repairable, and not covered. Even the laminate itself is allowed a mass increase of up to 19 per cent in a boiling-water immersion test — the surface takes on water too. The core just does it faster, and does not come back.
The spec decision here is not a product, which is why it never appears on a quote. It is workshop discipline — who seals the cut-out, with what, and whether that happens on the bench or on site at 4pm on a Friday. Ask directly. A cut-out sealed before the top reaches the unit is the difference between a top that dies at the sink and one that outlives two tenancies.
Stage four: the runners
Runners arrive fourth, and mostly do not wear out either. A runner is a precision part bolted to two gables, and it needs them parallel and still. Let one swell a millimetre — the same two cabinets from stage two — and the runner binds, the soft close stops closing, the drawer needs a shove. The runner is fine. The box it is screwed to has moved. One real hardware decision applies: load class. The cutlery drawer is never the problem; the pot drawer is, and one specified at the same class as the drawer above it fails first and predictably. Going up a class on the bottom drawer of each bank removes a callback you would otherwise fund forever — across a portfolio rather than one unit, that separates a maintenance budget from a replacement one.
If the soft close has gone on every door in the kitchen, I stop quoting hinges and start quoting a kitchen. The hinges are just the part that talks.
Stage five: the door edge strips
Last, and always last, the edgetape lifts — usually at a bottom corner under the sink or beside the dishwasher. It is the most visible failure here and the least urgent, which makes it a useful marker: when you see it across a kitchen rather than on one door, the kitchen is done.
Two things decide when it arrives. Thickness is the obvious one — Melteca is finished with 1mm or 2mm edgetape, and 2mm survives knocks and vacuum cleaners in a way 1mm does not. The glue is the one nobody asks about, and it matters more. EVA hot melt is a thermoplastic: it melts to go on, and heat and moisture can soften that same bond later — a poor trait forty centimetres from a dishwasher vent. PUR is a reactive polyurethane that cures into a cross-linked bond and does not re-melt. In a dry pantry the difference is academic; in a wet zone it decides whether stage five lands at the next refurb or the next inspection. Ask what glue the edgebander runs. If strips are lifting across a kitchen already, stop optimising — the honest version of the new doors versus a new kitchen conversation.
| Stage | What you see | What is actually happening | The spec decision that pushes it out | Cheap to fix? |
|---|---|---|---|---|
| 1 · Soft close | Doors slap instead of pulling shut | Door drifted or plate screws working; the damper never bites | One hinge and plate system portfolio-wide; set doors every turnover | Yes — minutes, if caught |
| 2 · Sink base floor | Dark tide line, soft patch underfoot | A slow weep keeps the board damp; chips swell, glue softens | MR-grade board in the sink base and dishwasher gable only | Yes, before the board blows |
| 3 · Postformed edge | Hairline lift at the front of the cut-out | Raw core in the cut-out has swollen; the radius is innocent | Cut-out sealed on the bench, in the workshop | No — the top is not repairable |
| 4 · Runners | Drawer sticks, soft close stops, needs a shove | Gables swollen or racked a millimetre; the runner binds | Load class up one on the bottom drawer of each bank | Sometimes — depends on the gable |
| 5 · Edge strips | Tape lifting at a bottom corner | Glue line has re-softened under heat and steam | 2mm ABS on PUR glue in the wet zone | No — by then it is a pattern |
What goes wrong
The most expensive mistake is budgeting by product instead of by order. An owner replaces a tired benchtop, bolts a new top onto the swollen carcass that caused the problem, then wonders why it lifts at the sink inside two years. The order is a dependency chain: stage three is the same water as stage two. Fix them out of sequence and you pay twice.
Second is treating the turnover adjustment as the fix. Someone winds the height cam up a millimetre and the door lines up. But if the plate screws have crushed their holes, that is re-timing a fastener with nothing left to grip. The test is free: adjust it, look again a fortnight later. Held? A setup problem. Moved? The board has gone.
Third is extraction, which is regulatory as well as physical. Under the healthy homes standards, kitchens need an extractor fan venting outdoors or a qualifying continuous mechanical ventilation system; for a kitchen with a cooktop, a fan installed after 1 July 2019 needs a minimum diameter including ducting of 150mm, or an exhaust capacity of at least 50 litres per second. Tenancy Services is explicit that recirculating units are not suitable, and the deadline for all private rentals has passed. The physics agrees: every gram of steam that does not leave the room condenses on something, and in a small unit that something is your cabinetry — the argument in ducted against recirculating.
Last is buying premium hardware as a substitute for spec. Expensive soft-close hinges screwed into standard-grade board in a wet zone fail on the same timeline as cheap ones, because the hinge was never what failed. Put the money in the board and the seal. And no tenant rings about a drop an hour under the sink — it is not a problem yet, only a problem in your ledger eighteen months later.
What to ask before you sign a rental kitchen order
- Which board is in the sink base and dishwasher gable — standard or MR grade? On the schedule, not in an email.
- Who seals the sink cut-out, with what, and on the bench or on site after the top is in?
- What glue does your edgebander run — EVA or PUR — and what goes on the wet-zone doors?
- Is the edgetape 1mm or 2mm, and is it PVC or ABS?
- One hinge and runner system across all my units, or whatever the installer had in the van — and what load class is the bottom drawer of each bank?
- Does the rangehood duct outside? A recirculating unit does not meet the ventilation standard, and does not move the moisture either.
- Who sets the doors at handover, and is a turnover adjustment in the maintenance programme or left to someone noticing?
Frequently asked questions
What breaks first in a rental kitchen?
The soft close, and it usually is not a break at all. Doors stop pulling themselves shut and start slapping, typically inside the first tenancy or two — most of the time the damper is fine and the door has drifted, or the plate screws have begun working in the chipboard. Treat it as the earliest and cheapest warning you get, because everything after it costs real money.
Is a swollen laminate benchtop the tenant's fault or the landlord's?
Usually the landlord's, as fair wear and tear — Tenancy Services defines that as gradual deterioration of things used regularly in the property, and a sink surround that has taken water over years fits squarely. A landlord arguing it goes beyond normal use has to show that first, and even then a tenant's liability for careless damage is capped at four weeks' rent or the insurance excess, whichever is lower. Budget it as an owner cost, not a bond deduction.
Can a swollen laminate benchtop be repaired?
No, and it is one of the few genuinely black-and-white answers in kitchens. The swelling is in the particleboard core underneath the laminate, not on the surface, so there is nothing to sand back or fill — and Laminex and Formica's own care guidance says a top swelled by standing water is not repairable and not covered by warranty. A postformed top is a single piece, so you replace the run, not the patch.
Is moisture-resistant board worth paying for in a rental kitchen?
In the sink base and the dishwasher gable, yes — those two cabinets are where nearly every moisture failure starts, and MR grade there is a small line against the cost of the kitchen. Through the whole kitchen it is harder to justify, since the wall units and the far end of the run never see liquid. Melteca comes on MR grades alongside standard ones, so it is a schedule decision, not a different product.
How long should a rental kitchen last in Auckland before it needs replacing?
It depends far more on the two wet cabinets and the extraction than on the age of the kitchen, so any single number is misleading. A kitchen with MR board at the sink, a sealed cut-out, a rangehood that ducts outside and a turnover inspection habit will outlast an identical one without them by years, at effectively the same build cost. The useful question is which stage it has reached: one or two is maintenance, three onwards is a replacement you have not scheduled.
Send us the unit count and the scope
MTN Kitchens & Maintenance builds out of its own workshop in East Tamaki and turns out ten-plus kitchens a week, largely for developers, builders and landlords running more than one door. Supply and install sit under one contract and one invoice, so nobody can point at the other between joinery and fitting, and there is no showroom to fund — which is why the pricing is trade pricing. Maintenance is in the name for a reason: the order above comes from what arrives back on the truck.
Send the unit count and a rough scope — a floor plan is ideal; an as-built, or photos and a linear-metre figure, will do — and you will have a trade-priced number back inside 24 hours, with the board grade and wet-zone spec named on the schedule rather than assumed. A single kitchen installs over five to seven days, and we are Site Safe qualified if it runs through a head contractor. If you are weighing what to do between tenancies rather than replacing outright, start with the fast turnover refresh and tell us which stage you are at.