The repair didn't hold. Which of its two claims broke?

A repair that came back early has broken one of the two claims it made: “this is the cause”, and “this will hold”. They break three ways: the cause was never found, the part is declining, or the work was defective. A stopgap claimed a date, not a lifespan. What the first repair claimed tells you which.

The two claims a repair makes

Both claims should sit in the paperwork from the first job. One is diagnostic: “this is what is causing the problem”. The other is about duration: “this work will stop it, and will go on stopping it for some length of time”.

A stopgap makes the second claim in a narrower form. It is applied to keep a defect from getting worse while the proper repair is planned, and the same reading covers any work that was knowingly limited in scope and given an end date. What it promises is a date: sealant until spring, a tarp for the week it takes a roofer to arrange access.

Test a stopgap that has come back against the date it was meant to carry you to. If it reached that date, it did its job and the proper repair is now due. If it gave way short of that date, the two duration cases below are the ones open to you.

When the defect reappears early, at least one of the two claims was wrong, and the three ways they break route to three different purchases:

• The diagnostic claim was wrong: the work was aimed at the wrong thing. You buy a diagnosis.
• The duration claim was wrong because the component is declining: a sound repair bought less time than anyone estimated. You run the replace arithmetic again.
• The duration claim was wrong because the execution was faulty: the work was done badly, whatever the diagnosis behind it. You make a warranty claim.

Buying the wrong one of the three is how the same defect gets paid for more than once.

The three-way split, and the claim that the questions below sort them, are ours: no source we found makes that distinction. The damp guidance treats a recurrence as a reason to investigate further and to verify the fix on a later date; it does not name which of the three cases you are in, and nor does the other page. Where damp and mould have reappeared, “further investigation and intervention should be pursued” (GOV.UK, damp and mould guidance for rented housing providers, updated 1 April 2026).

That page applies to the private and social rented sectors, and the second English source, below, is guidance written for social landlords, so nothing quoted from either here is a duty you hold over your own house. We cite both for the reasoning, and never as an obligation on you.

Four questions that sort the three cases

Three of the four are answered off paperwork you already have; the one about place you answer by looking at the wall.

• Was a cause ever written down? Not a part, not a procedure: a cause. If the invoice says “replaced seal” and nothing names what destroyed the seal, you never bought a diagnosis, and you have no wear story either, because wear was never established. Dutch professional inspectors work to the shorthand locatie, oorzaak, oplossing (location, cause, solution), and the cause is the middle one for a reason: without it, the contractor fixes the symptom and the defect comes back.
• How long did it hold, against how long it was sold to last? This is the arithmetic, and its unit is years. A fix presented as buying five years that failed inside a year has falsified its own duration claim. The same fix failing at year four has not; it did roughly what it promised, and you are in a replacement conversation with nothing to dispute. Where no duration was named at all, there is nothing to measure the failure against, and this question hands you to the other three.
• Same place, same failure? A defect returning at the identical spot through the identical mechanism says the cause is still running. One that has moved but kept its mechanism is still the same failure. Trace it back to where the water or the movement starts, not to where it shows. A failure arriving by a different mechanism elsewhere in the system is a case that leaves the first repair unimplicated.
• How many times now? Count the non-routine repairs on this one component; the whole-house total is the wrong number. A second repair within two years is the signal to rerun the annual cost method; by the third in two years the arithmetic stops being the tool, because the years-bought figure you would feed it is the exact number the pattern has discredited.

The question about place is the one easiest to answer too fast. A patch of damp returns on the chimney breast where it was cut out before: same failure. A resealed gutter joint drips again at the same seam: same failure, and the sealant was the second guess at it. The ridge tiles lift again in the next storm: same failure, and suspicion moves from the tiles to the fixing method. A different radiator goes cold while the repaired joint stays dry: a separate failure, and the first repair is not on trial.

When the cause was never found, buy a diagnosis

The next purchase is a diagnosis, and it is not a repair. A contractor arrives to do work; an inspector arrives to establish what is happening and has no priced job riding on the answer. The same guidance quoted above is blunt about why: landlords should not assume they will be able to diagnose the problem themselves in all instances, and should seek guidance from an appropriately qualified professional “to avoid misdiagnosis of the cause or causes” (GOV.UK). A housing ministry writing that down about damp is a signal about the difficulty of the diagnosis.

Rising damp is called out as specifically prone to it: in the same guidance it “is usually found in older properties and is often misdiagnosed” (GOV.UK). That is the shape of the trap: a mechanism with a well-known name attracts a well-known fix, and the fix gets fitted before the mechanism is confirmed.

Watch for one particular answer, because it ends enquiries early. The explanation offered may be your own household behaviour: how you ventilate, how you dry laundry, how warm you keep the rooms. The factor named may be a contributor. It cannot be both the whole answer and the end of the investigation.

English guidance for social landlords is direct about that stopping point, calling it “unacceptable for social landlords to assume that the cause of a hazard, such as damp and mould, is due to the tenant’s ‘lifestyle’”, and warning them not to “make assumptions and fail to take action or to investigate” on that basis (GOV.UK, Awaab’s Law timeframes guidance, updated 16 July 2026). That text governs social landlords and tenants, not you and your contractor; the same guidance puts the landlord’s duty, where a structural defect is behind the hazard, on “addressing the root cause”.

The same reasoning error has a price in an owner-occupied house: on our reading, behaviour measures belong alongside the repair and not in place of it. Once you have a cause in writing, the follow-up work is a different brief, and describing the symptom instead of prescribing the fix is what keeps the diagnosis on the contractor’s side of the table next time.

The version that gets paid for twice: replacing the visible layer

Treating the surface is the missed-cause case in disguise: the cause is still running, and the work was aimed at what you can see. The damp guidance states the mechanism outright: removing the surface mould “will not prevent the damp and mould from reappearing” (GOV.UK). Mould is the visible layer; whatever is wetting the wall is the failed one.

The same shape turns up wherever a finish sits over a fault. Fresh plaster over a wall that is still being wetted buys a stretch of looking repaired, and so does new sealant over a joint that is still moving. The reason this one is worth naming separately is that it does not look like a mistake while it is being made. The surface does improve.

When the part is declining, stop buying repairs

The years figure you fed into the repair-or-replace arithmetic was too generous. The recurrence has not changed the method; it has corrected an input.

Dividing each side by the years it buys is the annual cost method, and the repair-or-replace guide runs it in full, including the four situations where the arithmetic is the wrong tool and the cases where deferring with a date on it is the right call. Components also fail along a two-inflection curve, not at a steady rate, so a part in its steep phase buys less time per repair each round, and the second repair’s estimate is more suspect than the first’s.

When the work was defective, the remedy may be free

Defective execution routes to a warranty, not to a new invoice, and it is the cheapest of the three cases if you catch it inside the window. The routing runs by the nature of the defect:

• A defect in the product goes to the manufacturer or the retailer.
• A defect in the installation, such as a leak at a joint or an incorrect fitting, goes to the contractor who did the work.
• Normal wear falls outside all of the warranties and is yours.

Where the manufacturer and the contractor each point at the other, the written cause from the first job is the first evidence either side has, which is why the question about the cause comes first. The full routing, and the ninety-day reminder that keeps you from discovering the window after it shut, is in what your warranty actually covers.

A contractor whose work came back is not thereby a bad contractor, and the charitable reading is also the more useful one. The three cases are hard to tell apart from your side of the wall, and one of the three turns on their workmanship. Establishing which before the conversation starts is what lets you ask for the warranty remedy without the argument that comes from having accused them first.

Build the check into the next repair

You cannot re-run the first repair, so put the check into the next one, at the point you commission it. Four instructions:

1. Ask for the cause in writing, named separately from the work. One sentence is enough.
2. Ask how long the repair is expected to hold, and write the answer down with the date.
3. Agree a revisit at the time you agree the work, not when something goes wrong.
4. Photograph the area before the work starts.

A revisit is in scope if the quote says so. The damp guidance above asks for improvement work to be “accompanied by a follow up visit to the property”, and tells landlords to allow “at least 6 weeks after the initial treatment” before that revisit happens (GOV.UK).

That interval is specific to damp and mould treatment in rented housing, and it is not a general rule for repairs: do not carry the six weeks across to a boiler or a roof. What carries across is the shape, which is that a repair is verified on a chosen date and not at handover.

In appkeep you keep three things in one place: the defect as you described it, what the work cost, and the warranty terms the quote stated. That warranty term is the only duration it has a field for; if the contractor named a longer life for the work itself, that stays with the invoice. The cause, the revisit date and the photographs have no field yet, so keep those wherever you keep the invoice. A repair that was written down is straightforward to question a year later, and one that was only ever remembered is close to impossible.

Worked example: Jolanda in Deventer

Jolanda has a damp patch on an interior wall of a 1930s house, in the corner behind a downpipe. It was treated fourteen months ago: the plasterwork was cut out, replaced and redecorated, on an invoice reading “remedial plaster to affected area” at no stated cause. It is back, in the same corner, to about the same size.

Nothing on that invoice describes a temporary fix with a date on it, so the work was sold as the repair itself and the four questions apply. No cause was ever written down. No duration was named either, so the fourteen months cannot be read as early or late. The failure is in the identical place through the identical mechanism. This is the first return, so the second-repair signal has not been reached.

That silence is what rules the replace arithmetic out, for now. With no cause and no claimed duration, a figure for years bought would be invented, and feeding an invented number into a calculation returns an invented answer, so the replace arithmetic is not the move. It also tells her what the next quotation should not be. A second round of replacement plaster is the same purchase she already made, and a decorative covering over it renews the visible layer and leaves the failed one.

So she buys the diagnosis instead: the downpipe and the wall together, with the cause written down, before any plasterer is called. Her instruction names what she observes and asks for the cause, rather than naming the plaster. If the answer comes back as a defect in the fourteen-month-old work, she is in a warranty conversation, and if the contractor’s workmanship warranty is still running the remedy is free. If it comes back as a failed downpipe joint soaking the wall from outside, the plaster was always going to fail, again and again, for as long as the joint was left unfixed.

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Related guides

• Describe the symptom, not the solution: how the first sentence to a contractor decides who owns the diagnosis, and therefore who pays when a repair does not hold.
• Repair, replace, or wait: the annual cost method: the declining-part branch this page hands off, including the pattern override at the third repair.
• How long does a heating system last: where repair frequency beats age as a signal.
• When to hire a building inspector: what a diagnosis costs and what the report has to contain.
• What your warranty actually covers: the routing for a defect in the work itself.
• What to do when something breaks in your house: the six-step process a recurrence drops you back into.

Glossary terms used in this guide

• Glossary: Defect: what counts as one, and why the category matters at warranty time.
• Glossary: Component: the unit the repair count belongs to.
• Glossary: Stopgap: the temporary fix whose promise is a date, and what separates it from neglect.
• Glossary: Annual cost method: the arithmetic a recurrence sends you back to.
• Glossary: Two-inflection curve: why the years a repair buys shrink as a component nears the end.
• Glossary: Inspector: who you are buying a diagnosis from, and why their fee does not move with the answer.