How long do uPVC fascias last?

MyBuilder's roofline price guide (updated 21 August 2026) advises an inspection of the roofline at five-year intervals, and puts typical replacement at every 10 to 20 years, with the material and the local weather changing the answer. Plastic Centre, a retailer of uPVC products, says its boards last between 20 and 40 years.

Those do not agree, and it is fair to say why. A price guide for homeowners tends to describe what tradespeople see on ordinary houses, including cheap boards and rushed fitting. A retailer describes the product under good conditions, and it also has something to sell. Neither figure is a promise for your house.

The safe reading is a broad band. A well-made board, properly fixed and kept clean, can plausibly sit at the upper end. A thin board on a south-facing wall, fixed to damp timber, may need attention far earlier.

Sunlight is the first culprit. Ultraviolet light slowly yellows white plastic and makes it brittle, and the south and west faces of a house age faster than the north. Cheaper boards often have a thinner skin of weather-resistant material over the core.

Heat movement matters too. Plastic grows and contracts as the day warms and cools, and a board nailed too tightly will bow or crack at the joints. Look at the corner joints and the places where a board meets the gutter bracket, because splits show there first.

The timber behind is the quiet cause of many failures. A uPVC fascia is usually a cover board fixed over an old timber fascia. If water gets behind it from a leaking gutter or a gap at the roof edge, the timber rots, the fixings loosen and the new plastic droops. The plastic looks fine and the failure is underneath.

Stand back from each wall in turn and look up at the roof edge. Yellowing or chalky patches, hairline cracks along a board, joints that have opened, and boards that wave or bow between fixings are all age signs. A gap along the top edge where the board no longer meets the roof tiles lets wind and rain in, and offers wasps and birds a route into the roof void.

Soffits, the boards underneath the overhang, show their own signs: sagging, black marks from damp, and gaps at the wall. If the soffit carries vents, check they are still open, because blocked vents let the loft build up condensation. Our page on fascia and soffit materials compares the boards you might choose next time.

Staining that drips from a joint in the gutter and runs down the face of the fascia suggests a leak, not age. Fix the gutter first or the new board will suffer the same fate. See leaking gutters for how that is traced.

Cleaning helps more than people expect.

A little attention at the right moment saves money. Fixing a loose clip or resealing a corner joint while the board is otherwise healthy costs very little compared with replacing a run that has been left to fill with water. Check also that the ends of the boards, where they meet the wall or the bargeboard, are still closed, because an open end is an easy route for rain and nesting birds.

Wiping white plastic with warm soapy water and a soft cloth once a year removes the dirt film that holds moisture against the surface. Avoid abrasives and strong solvents, which dull the finish.

Keep the gutter running. Overflowing water is the greatest threat to the board behind it, and a blocked outlet or a collapsed bracket will send water straight down the back of the fascia. The gutter lifespan page explains how long the gutter itself tends to work for, since fascia and gutter are best treated as a pair.

Where the original timber is sound, a cover board can last a long time. Where it is rotten, the right job is to remove and replace the timber rather than fix new plastic over a rotten surface. Choosing a colour matters too. A black board shows less dirt but runs hotter in the sun, and our black roofline page deals with that trade-off.

A single cracked board or one open corner can often be repaired or replaced on its own, particularly on a house with easy access. Matching old white plastic to new can be harder than it sounds, because the old boards have yellowed, so a lone new piece sometimes stands out.

If several boards are failing, or the timber behind is damp, replacing the whole run at one visit tends to make more sense, since scaffolding is a large share of the cost. MyBuilder's same guide gives fascia at £80 to £150 per metre and soffit at £100 to £180 per metre, as typical UK figures, with scaffolding of roughly £20 to £40 per square metre. These are national numbers, so treat them as a guide to scale, and find out from every firm if its total allows for VAT and the scaffold.

At survey we photograph each elevation, tell you what is sound and what is not, and the written quote follows. We replace only what has failed, and our 10-year workmanship guarantee comes in writing. For the wider service, see gutters, soffits and fascias. If leaves and debris are filling the gutters that sit on these boards, our page on gutter guards looks at whether a guard helps.