Can I re-bed ridge tiles myself?

Ridge tiles cap the apex, the line where the main slopes of the roof come together. Getting to them means standing at the very summit, usually from a ladder that cannot be tied to anything useful, or from a roof ladder hooked over the ridge you are trying to repair. Tiles are slippery when damp, mortar dust makes the surface worse, and ridge tiles are heavy enough to take a hand with them when they slide.

The risk is not limited to you. A tile or a bucket of mortar that goes over the edge lands on a path, a car or whoever is below. A proper repair uses scaffold or an access tower with edge protection, which is why access is often the largest single cost on a small ridge job. Doing it without that is where accidents happen.

If you want to see what the trade method involves, our guide to re-bedding ridge tiles on Stroud roofs sets it out step by step. Read it as an explanation of the work, not as a recipe.

Bedding tiles in mortar sounds simple, but a repair that lasts depends on details you cannot see from a ladder.

• The old bed. Loose and crumbling mortar has to be raked out and the tile seats cleaned, or new mortar bonds to dust.
• The mix. A mortar too strong or too weak for the tiles will crack or powder within a few seasons.
• The fixing. The 2014 edition of BS 5534 treats mortar as a bedding, not a fixing, so each tile also needs a mechanical fastening suited to the covering.
• The line. A ridge that is not straight and level shows from the street and traps water.
• The ends. Ridge ends, junctions with hips and the last tile at a gable all need cutting and sealing correctly.

If the structure underneath has moved, new mortar will not hold it. A sagging ridge line is a timber problem first, and that needs diagnosing before any tile is touched.

You can learn a good deal without leaving the pavement or the garden. A pair of binoculars or the zoom on a phone camera does most of the work.

On the outside

Look along the ridge for a wavy line, a tile that sits proud, a visible gap, or white mortar staining on the slope below. Check the gutters and the ground by the downpipes for pieces of mortar, which is a sign the bed is breaking up. Look at the ends of the ridge, where tiles meet a gable or a hip, since that is where cracks often start first.

From the loft

Should the loft hatch be easy to reach, torch the underside of the ridge on a bright day for daylight showing through, and check for damp staining or wet patches on the timber near the top. Do not step off the joists, and do not go up if the boards are not clear.

Photograph what you find and keep the dates. Pictures help a roofer judge what is happening, and they help with an insurance claim if storm damage is behind it.

Some maintenance is genuinely safe to do yourself, provided your feet are on the ground. Clearing leaves from gutters with a steady ladder footed at the eaves, watching for mortar fragments, and trimming back overhanging branches that rub the roof are all reasonable. Moss on lower slopes can be seen from below, but scraping it off means going up, so leave that to a roofer too.

What we ask you not to do is paint or smear sealant, mastic or a bag of cement along a cracked ridge. A skin of sealant over a failing bed traps water, hides the crack and makes a proper repair slower, because it has to be chipped away first. It may also hold a loose tile in place just long enough to fall later.

If a ridge tile has already slipped, keep people away from the area beneath it. Our answer on what a hip iron is explains one fitting that stops hip tiles sliding, and the main ridge tile profiles help you describe what you have when you call.

A roofer brings safe access, the right mix and tiles, mechanical fixing to the current standard, and the means to correct what is underneath. In MyBuilder's 2026 figures, re-bedding or replacing ridge tiles runs £300 to £600, and repointing a ridge or hip £200 to £400. A dry ridge system is quoted by the metre, at £40 to £60 per metre for a typical job of £500 to £1,000. These are national typical ranges, and your own total depends on roof length, height and access.

Scaffold is the swing factor. On a steep Stroud lane, a terrace on a hillside or a roof with a long run of ridge, platforms are priced in at the survey, so the quote does not change on the day.

Our survey photographs your own ridge, and the quote afterwards covers access, tiles, bedding or dry-fix parts and labour. A 10-year workmanship guarantee in writing covers the finished repair, and waste leaves with us. For a first opinion, phone 01453 933613 or WhatsApp us a few pictures. Our main ridge, verge and dry-fix page lists every repair we do at the top of a roof.