The published figures
Two sources are worth reading together. HomeBuilding's guide to roof costs, last updated on 30 September 2025, lists clay tiles at 60 to 80 years. Marley, writing on tile life, attributes to the BRE a minimum of 60 years for clay.
The BRE figure applies to clay only. It is a floor set for one material, not a general number for all tiles, and it should never be carried across to concrete. Our concrete tile lifespan answer gives the separate figures for that covering.
| Covering | Published range |
|---|---|
| Clay tile | 60 to 80 years |
| Welsh slate | 100+ years |
| Spanish slate | 75 to 100 years |
The slate figures come from HomeBuilding as well. Read each one as a national guide's range, and treat a figure for a covering as different from a promise about one roof. How a particular roof was built and kept will move it either way, so a survey of your own roof, slope by slope and from the loft, matters more than the table.
What decides how long your clay roof lasts
A tile that can last six decades does so only if the rest of the roof lasts with it, and in a clay roof the tile is often the part that outlives everything else. These are the usual weak points:
- Nails and clips that corrode and let tiles slip.
- Underlay that has perished in the roof space.
- Battens that have rotted at damp joints, such as under a leaking valley.
- Lead flashings and mortar at chimneys and abutments.
Frost is the other test for clay. When a soaked tile freezes, the surface can flake away. The Met Office records 21.43 air-frost days a year at Manston as a 1991 to 2020 average, so winter cycles are a real part of a Thanet roof's year.
Quality varies by maker and by tile. Tiles of the same age can be sound on one roof and tired on another because of where they face, how well the roof drains and whether the gutters have kept water off the eaves. Shade from trees keeps a slope damp, which suits moss and slows drying after rain.
Signs that the tiles themselves are going
A roof with sound tiles and failing fixings can be given new battens and underlay and the tiles refixed. A roof whose tiles are failing is different, and the signs show from the ground and the loft.
Look for these signs, from a safe place on the ground or in the loft:
- Tiles flaking or splitting across the face, not just at the edge.
- A soft, crumbly texture where a tile has been scratched.
- Many tiles slipped out of line on one slope.
- Daylight through the roof from the loft, away from the ridge.
One or two cracked tiles are not a sign of an end-of-life roof, and a patch can usually avoid any wider strip. They can be swapped without taking the roof apart, and the guide to replacing a single roof tile shows how that is done.
A typical UK range for swapping up to six broken tiles is £75 to £400 from Which? Trusted Traders in November 2025, ex VAT. Which? adds that quotes in the South East tend towards the upper end, and Kent falls in that region.
Repair, refix or replace
A repair is often the right answer, since a clay roof of sound tiles should not be stripped just because it is old. If the underlay and battens are the failing layer, the tiles can be lifted, sorted and relaid on new timber with new fixings, with any broken ones replaced from reclaimed stock.
Full replacement is the answer when the tiles themselves are failing across whole slopes, and the survey photographs the evidence so you can see it for yourself before deciding. The survey looks at the faces, edges and undersides, tests the fixings and checks the loft, then says which of the three routes fits. It also notes the pitch of each slope and any trees overhanging the roof.
That check is more useful than the age of the house, because tile age is rarely recorded and roofs are often part-replaced over time. A roof can have 90-year-old tiles at the ridge and a rear slope redone twenty years ago.
If you are weighing clay against concrete for a re-roof, the page on clay against concrete roof tiles sets them side by side. All tiled work is grouped under pitched roofing, and pictures of the slopes and the loft side are all we need to start.
