A tiled roof rarely fails in the first cold snap. It fails because of what happened to it in the summer before: a hairline crack, a dry nail head, a gap at the eaves. Winter finds those weaknesses. Water gets into the crack and freezes, wind drives rain up under a loose tile, and a tile that was holding by habit finally lets go.
This guide is about the whole roof across the cold months. It looks at frost damage to tiles (spalling, where the face of a tile flakes away), slipped and lifted tiles, what roofers can and cannot do safely when the weather is bad, and how temporary cover protects a house until the proper repair. It does not go deep on any one fault; lifted eaves tiles, for example, have their own page on eaves tiles lifting or missing. Start at pitched roofing for the whole service.
How frost damages a tile
Clay and concrete tiles are not completely waterproof material. Both take up a little water, which then has to dry out. Where a tile stays wet for long, for example under moss or on a north slope that gets little sun, that water can freeze inside the surface. Ice takes up more room than water, and over repeated cycles it pushes the face of the tile off in flakes. This is spalling.
What spalling looks like
From the ground, spalled tiles look pitted or scaly, and bits of orange or grey grit collect in the gutter. Up close, the face has come away in thin layers, and the tile is thinner and weaker than it was. A spalled tile still sheds water for a time, but it absorbs more and the damage speeds up.
Age and type matter
Lifespan figures vary by source and by exposure. MyBuilder (updated August 2026) gives clay tiles 40 to 60 years and concrete tiles 30 to 50 years, while Marley points to around 60 years for concrete and notes this is not a guarantee. Our guide to roof tile types compares the coverings in detail. Pitted tiles on a young roof suggest a poor batch or constant dampness; on an old one, it is more often ordinary wear.
Frost and moss together
Moss itself does little harm, but it holds moisture against the tile and feeds frost damage. Scraping moss by hand is gentler than pressure washing, which MyBuilder warns may damage delicate tiles. Manual scraping costs £5 to £10 per m² according to MyBuilder (updated August 2026).
Driving rain: when water goes uphill
A tiled roof is designed to shed water downhill. Wind-driven rain defeats that design by blowing water up and sideways, under the lap of the tile and into the batten space. The underlay (the membrane over the rafters) is the second line of defence, and it is meant to carry any water that gets past the tiles down to the gutter.
Where it gets in
The usual entry points are the places where the lap is least generous:
- Low-pitched sections of the roof, where tiles lie flatter, a point we cover in our guide to low-pitch tiled roofs.
- Cracked or chipped tiles, which let water through even when the lap is correct.
- Verges, the sloping edges at a gable end, and ridges, where pieces are bedded or clipped rather than lapped like the field tiles.
- Valleys and abutments, where the lining takes the water that tiles cannot.
Wet underlay
When the underlay has torn or sagged between the rafters, it collects water in a pocket instead of draining it. In a loft, this shows as a patch of wet insulation or a drip that appears only after a long wet spell. Because the loft is cold in winter, the damp can sit there for weeks and rot the battens. Our guide to roof underlay explains what the membrane does.
Why winter leaks show late
Water travels along rafters and timber before it drops. A tile that was damaged in an autumn gale can produce a ceiling stain in January. That delay is why we ask when you first noticed the problem and look at the whole line of the leak, not just the spot on the ceiling.
Wind: slipped, lifted and missing tiles
Wind acts on a roof by pressure and suction. The windward slope is pushed; the leeward slope, the ridge and the edges are pulled. Tiles held by their own weight and one nail are most at risk where suction is strongest, at the eaves, the verge and the ridge.
What loosens a tile
A tile slips when its nail has corroded or pulled out, when its batten has rotted, or when the clip that holds it has fatigued. In many cases the tile has been loose for some time, and a gust finishes the job. Our guide to slipped roof tiles follows a refixing from start to finish, and our page on tile clips and nails explains the fixings.
Ridge and hip tiles
Bedded ridge and hip tiles are heavy and sit high. The 2014 revision of BS 5534 stopped relying on mortar by itself for these pieces, so they also get mechanical fixings. A ridge that has lost its mortar may still look sound from below, but may be loose. We check by hand on the scaffold, not by eye from the ground.
The eaves line
On the lower roof, the first course up from the gutter takes the strongest uplift. A missing tile at the eaves lets the wind get under the next one, and the damage can run along the course. That specific fault is the subject of our eaves guide; here the point is that winter wind turns one lifted tile into a row.
After a gale, count what has landed in the garden. Fallen tiles, a stray ridge piece or a slipped course mean the roof is open and should be made safe before more rain arrives.
What roofers can and cannot do in winter
Some roof work is safe in cold or wet weather and some is not. A good roofer will tell you which is which, and will not rush a job to please the calendar.
Work that can usually go ahead
- Replacing individual tiles and refixing slipped ones, in dry spells.
- Dry-fix ridge and verge work, because no mortar is involved. BS 8612 covers the tested dry systems, according to Marley.
- Lead dressing, patching and re-fixing flashings.
- Fitting temporary cover and emergency make-safes.
Work that is better postponed
- Mortar bedding and pointing. Fresh mortar can be damaged by frost before it sets, so ridges and verges are often better left until the weather settles, or done dry-fix.
- Full strips and re-roofs. Opening a whole slope in unsettled weather exposes the house. We schedule these for a window with a stable forecast and strip in sections.
- Anything on a roof that is wet, frosted or in strong wind. Tiles are slippery when frosted, and a person on a roof in a gale is at risk. We stop, and the job waits.
Access in the valleys
Steep lanes and terraced hillsides make winter access harder. Scaffold, skip and delivery positions are planned at survey and written into the quote, so a frosty morning on a steep road does not turn into a surprise charge. Our guide to tiled roof repair costs explains how scaffold and access feed into a price.
Temporary cover: how a make-safe works
When a roof has been damaged and the weather will not allow a proper repair, the aim is to stop water entering until it can be fixed. We prioritise leaks and storm damage, and the first job is always to stop the water.
What the cover is
For a small area, such as a few missing tiles, a roofer can fit a temporary patch: a section of membrane or sheeting laid under the neighbouring tiles and tucked in, with the tiles above holding it. For a larger hole, such as a storm-damaged slope, a heavy-duty tarpaulin or sheeting goes over the area and is battened down to the rafters or battens. It is fixed through to the structure, not weighed down, so the wind cannot lift it.
What it cannot do
Temporary cover is a stopgap. It does not last through a long winter, and sheeting can chafe, loosen and trap moisture against the tiles. We record the work with photographs, so you have evidence for your insurer, and we agree the permanent repair before we leave. Our guide to tiled roof damage and home insurance explains why those records matter.
Cost of a make-safe
MyBuilder (updated August 2026) puts storm-damage fixes at £500 to £1,500 and moderate repairs at £500 to £1,000. Those are national ranges. The written quote after the survey covers the temporary cover and the permanent repair, so you know what each is for.
Looking after a tiled roof before and after winter
Most winter failures are visible beforehand, in the autumn. A short check before the cold arrives saves most emergency calls.
A ground-level check
From the garden or lane, with binoculars if you have them, look for:
- Tiles that sit proud of their neighbours or at an angle.
- Gaps in a course, or bits of tile in the gutter.
- Moss in thick cushions, especially on north-facing slopes.
- Ridge or hip tiles that look out of line.
- Gutters overflowing, which can soak the eaves.
After a storm
Walk round the house and the garden. Look for tile fragments, and take a torch into the loft and look for pinpricks of light, drips or soggy insulation. Photograph anything you find, with dates, before it is cleared. Do not climb onto the roof: wet or frosted tiles are slippery, and a fall is a far worse outcome than a leak.
A survey in the dry months
A roof survey and report costs about £150 to £250 for a standard visit, according to MyBuilder (updated August 2026). A survey in late summer or autumn leaves time to fix faults before the cold. You get photographs of your own roof along with a plain list that ranks urgent faults ahead of jobs that can wait a season, and a written quote with the guarantee, a 10-year workmanship guarantee in writing, set out on paper.
If a storm has already caused damage, ring 01453 933613, or send photographs by WhatsApp or use the enquiry form. We will tell you how we would make it safe.