Relining a gutter that cannot be taken down
Built-in, box and yankee gutters are part of the roof structure, not hung off it. Relining puts a new waterproof surface inside them. We match you with the specialists who do this work.
What is gutter relining?
Relining is the repair method for gutters that are built into the roof structure rather than hung from the fascia - box, built-in and yankee gutters, common on older and larger houses. Because the trough is part of the cornice, it cannot be unclipped and replaced; instead the failed surface is stripped and a new continuous liner is installed inside it. If your gutters are ordinary aluminium hung on the fascia, this is not your service - repair or replacement is.
Signs you need gutter relining
- Water appearing inside the house at the top of an exterior wall, or staining on a ceiling directly under the eave line
- A gutter that is formed into the roof edge itself, so you cannot see a separate trough hanging below the shingles
- An older or architecturally significant house where the cornice returns and the gutter are one continuous detail
- A previous repair visible as a patchwork of asphalt compound, tar or mismatched flashing inside the trough
- Soldered seams in a metal trough that have opened, or corrosion pinholes in an old metal lining
- A flat-bottomed trough that holds standing water long after rain has stopped
Seeing something not on this list? Browse gutters problems by symptom →
How gutter relining actually works
Confirm what kind of gutter you actually have
A built-in gutter sits within the roof structure and its outer face is part of the cornice; a box gutter runs in a valley between roof planes or behind a parapet. Both are structural. Hung gutter, however old, is not relined - it is replaced.
Watch forA quote to reline conventional hung gutter. That is a repair method applied to the wrong problem, and it is more expensive than replacing the gutter outright.
Strip back to a sound substrate and find the real damage
Old lining, failed compound and accumulated patching come out. The important part is what is underneath - decades of leaking almost always means rot in the gutter boards, the rafter tails or the cornice framing, and none of it can be assessed until the trough is bare.
Watch forA liner installed over soft wood or over an existing failed layer. A liner is only a surface; it moves with whatever it is bonded to, and rotten timber underneath will telegraph and split it.
Repair the carpentry and re-establish the fall
Rotten boards are cut out and replaced, and the fall toward the outlets is corrected while the trough is open. Many old built-in gutters were nearly flat to begin with and hold water permanently, which is what destroyed the original lining.
Watch forA reline with the original flat profile reproduced exactly. If the trough held water before, it will hold water again, and standing water is what finishes a liner off.
Install the liner - membrane or metal
The two families are a fully adhered or torch-applied membrane, and a formed metal liner in copper, stainless or coated steel with soldered or lock seams. Membrane is faster and cheaper and reads as a modern repair; metal is the traditional and longer-lived answer and costs accordingly.
Watch forAny liner terminated without a proper upstand and flashing under the roof covering. The head of the trough is where relining fails - water gets behind the liner and the leak reappears in exactly its old position.
Detail the outlets and test
The outlet is where a liner has to be dressed into a pipe, and it is the second most common failure point after the head. Once complete, the trough is flooded and watched, because there is no other way to prove a repair to a component that is inside the building envelope.
Watch forNo flood test. A built-in gutter leak reappears as water inside your house, and by then the ceiling has been redecorated.
What does gutter relining cost?
Relining is specialist work and it is priced accordingly - by the linear foot, with carpentry repair usually a significant separate item and metal liners costing considerably more than membrane. On a historic house it can approach the cost of other major roof work. See the gutters cost guide for context.
See the full gutter relining cost guide - by material, size and region →
If the number is the problem, here are the ways people pay for it →
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When gutter relining is the wrong call
When saying yes is the wrong move:
- You have ordinary hung gutters. Relining is not a method for aluminium or vinyl gutter bolted to the fascia. Those get repaired or replaced, and either is far cheaper than a lining system.
- The timber structure is extensively rotten. Once the gutter boards, the rafter tails and the cornice framing have gone, you are looking at reconstruction with a new lining as the final step, not at a relining job. Getting that reframed as what it is prevents an unpleasant mid-project conversation.
- The roof covering above the gutter is due for replacement anyway. The liner has to be dressed under the roof covering at the head. Doing it now means disturbing new work later, or leaving the one detail that matters most untouched.
- Nobody local does this work. Built-in gutter is a sheet-metal and restoration trade, and a general roofer improvising a lining out of roll material is where most of the worst examples come from. If you cannot find a specialist, wait for one rather than accepting the nearest willing bidder.
- The house is listed, in a historic district, or subject to design review. Substituting a membrane for original metalwork can require approval, and doing it first and asking later is expensive. Check before specifying.
- The leak has not been located. Water at the top of an exterior wall can come from the gutter, from failed flashing above it, or from the wall itself. Relining an intact gutter because the ceiling is stained is a costly way to not fix a problem.
Types of gutter relining
| Option | What it means for you |
|---|---|
| Gutter materials | Copper, stainless and coated steel behave very differently as liner materials. |
| Leaking joints and standing water | The symptom pages that help distinguish a lining failure from a hung-gutter fault. |
| Aluminium versus copper | Relevant to liner choice on a house where the original detail was metal. |
What to check when hiring for gutter relining
- How much of the gutter carpentry is included, and how is extra priced? Rot is found once the trough is stripped and it is nearly always there. An agreed rate per foot beforehand prevents the worst mid-job conversation on this type of work.
- How will the liner be terminated at the head, under the roof covering? The head detail is the most common failure point. A specialist will describe an upstand and a flashing lap without being prompted.
- Are you correcting the fall, or reproducing the existing profile? Many original built-in gutters were close to flat and held water permanently. Rebuilding that faithfully rebuilds the cause of the failure.
- Membrane or metal, and what is the expected service life of each here? A real trade-off with a large price gap. You want the contractor to explain the choice rather than to present one option as the only method.
- How many of these have you done, and can I see one? This is a narrow specialism. On a general roofer's truck it is an occasional improvisation; on a restoration contractor's it is routine work.
- Will you flood-test the finished trough before you leave? A built-in gutter leak shows up as water inside the house. There is no acceptable substitute for proving it while the crew is still on site.
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Sources
Sources last checked
- Flood Insurance — Know Your RiskFEMA / National Flood Insurance ProgramRetrieved 2026-08-04Water management context for drainage and gutter decisions near flood risk.
- Occupational Employment and Wages — Construction TradesU.S. Bureau of Labor StatisticsRetrieved 2026-08-04Labor cost context for home-services trades nationally.
Sources for figures and claims on this page.
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