The short answer
DIY ridge tile repair is not advised. The ridge sits at the top of the house in the full wind, getting there safely means scaffolding or a roof ladder, and current practice adds mechanical fixings to the mortar. A fall from a roof can cause life-changing injury, and a poorly bedded tile can come loose again within a season. A roofer does the job safely and fixes it to current practice.
The real problem is height, not the tile
Replacing a ridge tile is a small task on paper: remove the broken piece, spread mortar, press a new one down. What makes it hard is where it happens. The ridge is the very highest line of the roof. On a two-storey house you are working several metres off the ground, kneeling or leaning on a slope of slippery tiles, with wind that grows stronger the higher you go.
A ladder against the gutter is not a safe base. Gutters are made to carry water and not a person, and a ladder that slides sideways drops you with no warning. Stepping from a ladder onto the roof is the moment many accidents begin, and nothing on a tiled slope gives a handhold once you are on it.
Tiles themselves are fragile underfoot, as our page on walking on a tiled roof explains. A cracked tile under your boot starts a slide, and the slope does the rest.
What a safe ridge repair needs
Professionals do not simply climb up. Work at that height calls for edge protection, which in practice means scaffolding to the eaves, plus a roof ladder or crawling board to spread weight on the slope. MyBuilder's scaffolding guide, updated on 21 August 2026, gives about £850 to £1,200 for the usual two-storey house, which shows why hiring the platform is rarely worth it for one tile.
Beyond the scaffold you need the right materials and tools: a bedding mortar mixed properly, mechanical fixings, a trowel and pointing tools, and spare tiles of the right profile. Mixing is more skilled than it looks, and our page on mortar versus dry-fix explains how the choice of system changes what is needed.
You also need someone on the ground. Working alone at height with no one aware of it is a risk of its own, whatever the job.
Mortar alone is no longer the standard
Many people picture ridge repair as mortar only, because that is how their roof was first done. Practice has moved on. After BS 5534:2014 the tiles along a ridge or hip are secured by fixings in addition to the mortar bed. Dry-fix systems tested to BS 8612:2018 are one route, with clips, trays and fixings that need no bedding mortar.
A DIY repair that uses only a handful of mortar can look perfect from the road and still fall short. The tile sits on the mortar, but nothing secures it against wind uplift, and a good gust can lift it and break the bond. You then have the same crack, the same cost and a worse position.
Fixings also need to meet the right timber or the right bracket. On a hip, the bottom tile is stopped from sliding by a small metal bracket, and our page about the hip iron shows why that detail matters.
Getting the right tile
Ridge tiles are made in half-round, angled, ogee and several other shapes, and they come in many sizes and colours. A replacement that is slightly the wrong profile will not seat on its neighbours, and a gap at the joint lets rain in. Old clay and concrete weather in colour, and a fresh piece can look different for a long time.
Our guide to types of ridge tiles helps you tell which you have. Even so, matching is usually a job for someone with a supplier and an eye for old stock.
Buying a tile from a builders' merchant, climbing up and finding it does not fit is a common outcome. The tile then has to be bought again, and the hole in the ridge stays open meanwhile.
What can go wrong afterwards
If the repair is done badly, you often will not know at once. Water enters a gap, runs under the felt and dampens the ridge board or the upper rafters. The first hint may be a tide-mark on a bedroom ceiling months afterwards, or damp insulation in the loft that you never look at.
Poor bedding also shrinks and cracks, leaving the tile loose within a season or two. A tile dropped from the ridge can hit a car, a conservatory roof or a person below. Cement mixes too strong for old tiles can crack them too.
A professional repair sits on a sound bed, is fixed mechanically and has a written guarantee behind it. If something goes wrong with ours within the guarantee period, we put it right, which is not an option when the work is your own.
What is sensible to do while staying on the ground
Quite a lot of useful checking needs no ladder. Look at the ridge with binoculars, note any tile that is out of line, and check for pieces in the garden or gutter. Photograph the problem with a zoom. In the loft, check the timbers below the ridge for damp marks or daylight.
Then send those pictures to a roofer. Once we have surveyed, the written quote follows, and when a single tile is the fault we suggest only that. Where the fault lies at the edges instead, such as caps blown off a dry verge, our page on dry verge caps describes what to look for.
The ridge, verge and dry-fix service pages explain the options. We work across Swindon and the area within 30 road miles, and take the waste away. Telephone 01793 626096 or use WhatsApp to arrange a visit.