How long do uPVC gutters last?

Look for a lifespan for plastic gutters and you find numbers for the neighbouring parts instead. Checkatrade says how often uPVC fascias and soffits get changed has no firm rule, though most panels carry a guarantee of ten years or more. A retailer, the Plastic Centre, writes that its fascia boards can last between 20 and 40 years. Gutters share the roofline with those boards, are made of the same family of plastic and face the same weather, so that is a fair hint, though not a measurement.

Notice who is speaking. A price guide describes when people replace, which includes cosmetic reasons. A seller of boards has an interest in a generous number. Neither tests a particular gutter on a particular house, and both are typical ranges, not promises. Treat the spread, ten to forty years, as a sign of how much depends on circumstances. A south-facing wall, a sheltered courtyard and a coastal road will not age a gutter at the same pace, and nobody can give you a single date for yours without seeing it. What we can do is read the condition in front of us.

The plastic is rarely the first thing to fail. More often it is a bracket, a joint or the board behind. A gutter that is cleared regularly and supported at sensible intervals carries water without strain. One that fills with silt and wet leaves becomes heavy, bends its brackets and then drops at the front edge.

Fixing quality counts. Brett Martin's guidance gives a fall of 1mm for every 600mm and brackets no more than 900mm apart, and runs set outside those limits tend to hold water or sag. Overhanging trees, a roof that sheds moss, and a downpipe that blocks all add load. Impacts matter too: a ladder leaned on the front edge each year can crack a gutter long before age would. How a gutter is treated usually explains its lifespan better than the calendar does. Two identical gutters on neighbouring houses can end up ten years apart, and the difference is nearly always care, fixing and a sound board behind.

Colour is the first clue. White plastic turns yellow or chalky with age, and a brittle surface that cracks when pressed is past mending. A gutter that has gone out of shape, with a sagging front edge or a joint that has opened, may still be serviceable if the plastic is supple. If it has lost its stiffness, new brackets will not bring it back.

Count the problems. One weeping joint is a repair. Joints weeping all along the run, brackets snapping when touched, and cracks near the stop ends together tell you the system is finished and patching will only delay the bill. Our page on leaking gutter joints shows what a single repair involves. Check the fascia behind too, since a soft board ends a gutter's useful life regardless of the plastic, and a screwdriver pressed gently into the timber will tell you if it has gone spongy. Stains on the wall under a joint, and green growth in the same spot, show where water has been escaping.

Clean it before it overflows. Removing silt and leaves once or twice a year takes weight off the brackets and keeps joints dry. Check the run after a gale, looking for slipped sections or a bent bracket. Reset small faults at once, because a drooping length lets water sit, and standing water speeds the damage. A gutter that drains freely is working with its design.

Keep the roof edge clear of moss, and trim branches that drop leaves. Keep ladders off the front edge: a stand-off bar passes the load to the wall instead. If a section has pulled away at the bracket, refix it before the next heavy rain. Our guide to how often to clean gutters sets a sensible routine. If you do get a leak, a quick re-seal costs far less than waiting until the fascia behind has soaked through and needs replacing as well.

Where the plastic is sound, repair is the right call. Where the system is brittle and failing along its length, replacement wins, ideally with the fascia checked and renewed at the same time. A roofline done together needs access once, and Checkatrade's scaffolding guide (updated October 2026) lists roughly £875 for a month on a two-storey semi, a figure that shows why combining the work makes sense. Replacement cost also follows the length of the run, the house height, the colour and the state of the fascia, so a guide figure is a rough guide only.

We photograph the gutters and the boards behind, then give a plain verdict: repair, patch for now or replace. A single written total follows from the survey, and if a repair will hold we say that rather than selling a new run. Our answer on replacing 20-year-old gutters and the guttering, soffits and fascias hub cover the next steps.