The short answer
One cleaning firm's guide, Pureseal Services, December 2025, gives uPVC gutters 10 to 20 years, aluminium 20 to 30 and cast iron 40 to 70, sometimes more than 100. Only one source stands behind these figures. Care, fall and the fascia behind the gutter change the answer, and none of these figures is a promise.
The ranges we can source, and how far to trust them
There is no tested, independent figure for gutter life. The most useful published range comes from a single source: Pureseal Services, a gutter cleaning firm, in a guide dated 9 December 2025. It puts uPVC gutters at 10 to 20 years, aluminium at 20 to 30 years, and cast iron at 40 to 70 years, with some lasting beyond 100.
| Material | Typical life quoted | Source |
|---|---|---|
| uPVC | 10 to 20 years | Pureseal Services, 2025 |
| Aluminium | 20 to 30 years | Pureseal Services, 2025 |
| Cast iron | 40 to 70 years, sometimes 100 or more | Pureseal Services, 2025 |
Confidence in these numbers is low, , whatever the table seems to suggest. It is one company's blog, not a standard or a laboratory result, and it describes no test method. Read the numbers as an order of magnitude: plastic is the shortest-lived of the three, and iron the longest if it is kept painted and clear. Ask what the author actually measured, because a cleaning firm sees gutters that have already given trouble, which can pull its averages in either direction.
The materials themselves, and which to choose, are compared in our guide to uPVC, cast iron or aluminium gutters.
Why plastic, aluminium and iron age differently
Each material fails in its own way. Plastic gutters grow brittle in sunlight and cold. The surface chalks, the clips snap, and joints with rubber seals dry out and open. A plastic gutter rarely fails all at once; it develops drips at joints and cracks at corners, and the usual verdict is that the system has had its day.
Aluminium does not rust and holds a coating well, so it tends to fail at joints and at fixings, or through dents and damage. Cast iron is heavy, strong and rusts from the inside out. It lasts longest when it is kept painted inside and out and when the joints are kept sealed, but a neglected section can crack through at the bolted flange.
Black cast iron is a common feature of older Stroud houses, and a replacement that looks different is worth discussing with the council's planning team before ordering if the house has listed status. Our answer on black roofline looks at the colour choice when boards and gutters are renewed together.
What shortens a gutter's life
Standing water is the main enemy. A run with a poor fall, or one whose outlets are blocked, keeps water in the bed, which stresses joints and encourages rust and moss. Our answer on what fall a gutter should have gives the manufacturer ranges.
Debris is next. Wet leaves and silt hold moisture against the metal and weigh down the plastic. Under trees, a gutter that is never cleared ages faster than one that is, since leaf mould sits against the metal or plastic all winter and every wet spell tops it up. Ice does mechanical damage: water freezes in the channel, expands and pushes joints apart.
The fascia behind matters just as much. A gutter on a rotten board will pull away long before the material has worn out, and a perfectly good run can be scrapped because the timber behind it has failed. Ladders leant on the gutter, and brackets spaced too wide, also cause early damage. A tidy, clear, well-hung gutter lasts closer to the top of its range.
Repair or replace: when the numbers tip
A birthday does not condemn a gutter. A section of cast iron can be renewed, a plastic joint resealed and a bracket replaced. The balance tips when problems come in numbers: several leaking joints, a warped or cracked run, rust that has gone through, or a fascia that must be renewed in any case.
Cost helps the decision. MyBuilder's 2026 guide puts guttering at about £30 to £70 per metre, with scaffold extra at £20 to £40 per m². Where scaffold is needed anyway for fascias or roof work, renewing the gutters at the same time spreads that cost. On a house where several parts of the roofline are near the end of their lives, doing them together is normally tidier, and it means the new gutter is hung on a new board with the fall set once, not twice. If only the gutter is tired and the boards are sound, a gutter-only job is perfectly sensible.
It is worth reading our answer on whether gutter leaks are covered by home insurance before a problem develops, so you know where wear ends and insured damage begins.
Getting a straight answer for your own gutters
A survey gives a better answer than any table. We look at the material, the joints, the fall, the brackets and the board behind, and take photographs of each. From those we can say whether repair makes sense or whether renewal is the better value.
The written quote that follows covers scaffold, removal, new gutters, fascia work, waste and making good. Typical ranges are published first, with their source and date, so you can see what a job tends to cost before anyone visits. Work is like for like on older houses, and a 10-year workmanship guarantee in writing comes with finished jobs.
For the rest of the roofline see our guttering, soffits and fascias page. If you can, a few ground-level photographs of the joints and the run would let us suggest where to look first.