Question answered
Can one cracked roof tile be replaced?
The short answer
Yes. One cracked roof tile can be replaced on its own. The neighbouring tiles are eased up, the broken tile is freed from its batten, and a matching tile is slid in and fixed. The harder parts are safe access and finding a tile that matches the roof. A crack can also point to a torn underlay or soft batten beneath, so the area is checked before and after the swap.
Yes, a single cracked tile can be changed without disturbing the rest of the slope. The skill is in reaching it, finding a tile that matches and checking what the crack has let through.
Swapping one broken tile in an intact slope
Tiles overlap like fish scales, so the one to be replaced is pinned in place by those above it. The roofer lifts the courses above with wedges or a tile lifter, just far enough to free the cracked tile. The tile hangs from its nibs on a batten, and any nail or clip holding it has to be released or cut. It then comes out in pieces or whole.
The new tile slides in, hooks over the batten and is fixed with a nail or clip, so it stays put in a gale. The neighbouring tiles are lowered back. Interlocking tiles, which lock together at their sides, are fiddlier than plain tiles because the lifting has to clear a side channel as well. Done properly the repair is invisible from the ground, apart from the new tile's colour, which brings us to the next problem.
Finding a tile that matches
A new tile beside a thirty-year-old one will look brighter, and sometimes a different shape. The usual answers are a salvaged tile of the same type, or a new tile from the nearest range. A hidden swap can be made by taking a sound tile from a low-visibility slope, such as the back of a garage, and fitting the new one there. The patch on the street side then blends in. The detail of weathering, reclaimed supply and old types that are no longer made is in how to match old roof tiles.
On a listed building, replacement in non-matching materials is the sort of repair the council says may need consent, and like-for-like repair in place usually does not. If your home is listed or in a conservation area, raise it with the Adur & Worthing planners beforehand, or with the South Downs National Park Authority if the house lies inside the Park.
Reaching the tile safely
Access decides the cost more than the tile does. If the cracked tile is low on a rear slope, a ladder with a roof ladder laid on the slope may be enough. Higher up, over a conservatory or a stair void, or on a steep slope, the safe way is a scaffold tower or a scaffold, and that can cost more than the repair itself.
MyBuilder gives a typical UK range of £100 to £300 for a minor roof repair, and about £850 to £1,200 to scaffold a two-storey house. Both figures are guides only, and the quote is put in writing once we have seen the roof. Tiles are brittle underfoot, and a walker will crack more than they find, which is a good reason to keep off the roof. If you can see the tile from the ground, take a photograph and send it, because it helps to plan the access before anyone arrives.
What a cracked tile can hide
The crack is a visible fault that may lead somewhere. Water that gets through it lands on the underlay, runs down to the batten and keeps going. If the underlay is torn there, the batten can be wet and soft. If it is not, the crack may only have let a little rain through to a sound sheet that shed it. The only way to tell is to look, so we lift the tile and check the layers beneath before fixing the new one.
A cracked tile can also be one of several. A slipped tile beside it, a line of cracks from a fallen branch or tiles that have crumbled along a frost-prone slope all change the diagnosis, and what causes slipped roof tiles explains the first of these. We photograph what is found underneath and show you, so the cause is plain and the swap is not guesswork.
One tile, a patch, or a bigger decision
A single swap is the right job when the rest of the slope is sound, the batten under it is firm and the underlay has no tear. Pay attention to the tiles around it too: if neighbours ring dull when tapped, or crumble at the edges, they are close behind. When tiles are cracking across a large area, the covering has probably aged out, and replacing them one at a time is a false saving. The kind of tile matters here, because concrete and clay, plain and interlocking, age in different ways. Our guide to roof tile types sets out the differences.
Our rule is a repair sized to the fault and no larger. If one tile is all it needs, one tile is what we quote, and a clear photograph of the finished slope shows it. If the survey shows more, we show the photographs and talk it through. The full range of tiled roof work, from small swaps to complete re-covers, is on the pitched roofing hub.
Cracked tiles: two practical questions
Can a cracked tile be sealed with mastic instead of replaced?
Mastic or bitumen may hold for a short time, but it hides the crack, can trap water against the tile and fails as the tile moves. It also makes the later proper repair harder. Swapping the tile is the lasting fix.
Why did a tile crack when nothing hit it?
Frost splitting a damp tile, movement as the batten shifts, a footstep from someone working on the roof, or simple age are the usual causes. A line of cracked tiles suggests something pressing on them. A lone one is often just an old tile that has had enough.
Tell us about your roof
Describe what is happening and we will call you back to arrange a visit.
- Photographs of what we find
- A written quote with one total price
- Or call 01903 299063
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