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Ridge tile repair covers the tiles that cap the very top of your roof, where two slopes meet, and the mortar that beds them. In Edinburgh, that mortar cracks and crumbles under wind and frost, letting water straight into the roof space.
At Edinburgh Borders Roofing, we re-bed and repoint ridge and hip tiles across Edinburgh, the Lothians and the Scottish Borders. This guide explains the warning signs, the difference between repointing and re-bedding, and when a dry ridge system is the better long-term fix.
Signs your ridge tiles need repair
The clearest signs of ridge trouble are cracked mortar along the ridge line and tiles that look loose or out of line from the ground. Others show up as debris or leaks.
Watch for these warning signs:
- Cracked or missing mortar along the ridge line at the top of the roof.
- Loose, slipped or rocking ridge tiles, or one sitting out of line.
- A missing ridge tile, leaving a gap at the apex.
- Mortar debris on the roof slopes, in the gutters or on the ground.
- Damp patches in the loft or on top-floor ceilings.
- Daylight visible at the ridge from inside the loft.
If a ridge tile has moved at all, the bedding beneath it has failed, even if the pointing still looks tidy in places.
Why ridge tiles fail in Edinburgh
Ridge tiles fail because the mortar bedding them weakens over time, and Edinburgh’s exposed roofs and harsh weather speed that up. The ridge takes the full force of the wind.
Traditional ridge tiles are bedded and pointed in sand and cement mortar. Over years, that mortar dries out, shrinks and cracks, and once cracks appear, water gets in, freezes, and widens them. Edinburgh’s wind-driven rain and freeze-thaw cycles attack the ridge harder than almost anywhere else on the roof, because it sits at the highest, most exposed line. A weak original mortar mix or a poor past repair, where new mortar was smeared over old, fails even faster. Once the bedding goes, the tiles loosen and let water into the roof space, so prompt roof repairs matter.
Repointing vs re-bedding: which do you need?
The right repair depends on one simple test: whether the ridge tile moves. Repointing renews the surface mortar joint, while re-bedding lifts the tile and sets it on fresh mortar underneath.
Repointing renews the outer joint of mortar along the ridge, targeting cracks and gaps that let wind-driven rain in. It suits a ridge where the mortar has cracked on the surface but the tiles are still firmly bedded. Re-bedding means lifting the ridge tiles, removing the failed bedding mortar underneath, and setting them back onto a fresh bed, then pointing the joint. It is the correct repair when tiles are loose, rocking or slipping, because the base support has failed.
| Repair | When it is right | What it does |
| Repointing | Mortar cracked, tiles still firm | Renews the outer joint only |
| Re-bedding | Tiles loose, rocking or slipped | Lifts and re-sets tiles on fresh mortar |
The key point: if a tile is loose, repointing the outside rarely lasts, because it does not restore the support underneath. Testing each tile for movement first is what avoids a repeat repair.
What is a dry ridge system?
A dry ridge system fixes ridge tiles mechanically, using screws, clamps and unions, instead of bedding them in mortar. It is a low-maintenance alternative to traditional mortar bedding.
Rather than relying on mortar, a dry ridge system secures each tile with stainless steel fixings and a ventilated union strip that also lets the roof breathe. Because there is no mortar to crack, it does not need the periodic repointing that a cemented ridge does, and it resists wind uplift well. It has been standard on many new roofs under British Standard BS 5534 for some time, though repairs to existing roofs, and many listed and period properties, are treated differently. On a traditional Edinburgh roof, whether to keep a cemented ridge or switch to dry fix is worth discussing with your roofer.
Hip tiles and verges
Hip tiles and verges suffer the same mortar problems as ridge tiles, and are repaired the same way. They sit on the sloping edges of the roof and at the gable ends.
Hip tiles run down the external angle where two roof slopes meet, and like ridge tiles they are traditionally bedded in mortar that cracks and loosens over time, needing repointing or re-bedding. Verges, the junction at the gable end, are also often bedded in mortar that deteriorates and lets water in, and can likewise be renewed or switched to a dry verge system. The same movement test applies: if the tile shifts, the bedding has failed.
Can you repair ridge tiles yourself?
For most homeowners, ridge tile repair is not a safe DIY job, because the ridge sits at the highest and most exposed point of the roof. The repair also needs the right mortar and technique to last.
Working at the apex of a pitched roof is dangerous, and a fall from that height can be fatal, which is why the job needs proper access and set-up, not a quick trip up a ladder. Beyond the danger, a lasting repair needs the tiles fully lifted, the old mortar removed, and a correct fresh mix, not new mortar smeared over old, which simply falls off again. This is work for a roofer with safe access, which for awkward roofs may mean rope access. The Health and Safety Executive stresses that roof work must be planned and carried out safely, whatever the job length.
How we repair ridge tiles at Edinburgh Borders Roofing
We check each ridge tile for movement first, then choose the repair that will actually last. Our free photographic roof survey shows you the condition of the ridge, hips and verges, so you can see whether repointing or re-bedding is needed. As an established Edinburgh roofing company, we re-bed, repoint and renew ridge, hip and verge tiles, and fit dry ridge systems where they suit, across Edinburgh, the Lothians and the Scottish Borders, with rope access for exposed roofs.
If your ridge line is cracked or a tile has slipped, book a free photographic roof survey with Edinburgh Borders Roofing and we will tell you honestly what it needs.
Frequently asked questions
Q1. What are the signs ridge tiles need repair?
Answer: The common signs are cracked or missing mortar along the ridge line, loose, slipped or rocking ridge tiles, mortar debris on the roof or in the gutters, and damp or daylight visible in the loft. If a ridge tile moves at all, the bedding beneath it has failed and needs attention.
Q2. What is the difference between repointing and re-bedding ridge tiles?
Answer: Repointing renews only the outer mortar joint along the ridge, and suits a ridge where the tiles are still firmly bedded but the surface has cracked. Re-bedding lifts the tiles and sets them on fresh mortar, and is the correct fix when tiles are loose, rocking or slipped.
Q3. Why do ridge tiles come loose?
Answer: Ridge tiles come loose because the mortar bedding them dries out, shrinks and cracks over time. The ridge sits at the highest, most exposed point of the roof, so Edinburgh’s wind-driven rain and freeze-thaw cycles attack it hard. A weak original mix or a poor past repair fails even faster.
Q4. Is a dry ridge system better than mortar?
Answer: A dry ridge system fixes tiles mechanically with screws and clamps, so there is no mortar to crack and it needs little maintenance. It resists wind well and ventilates the roof. It is standard on many new roofs, though period and listed properties are often treated differently, so ask your roofer.
Q5. Should I repair ridge tiles myself?
Answer: For most people, no. The ridge is the highest, most exposed point of the roof, and a fall from there can be fatal. A lasting repair also needs the tiles properly lifted and re-bedded in the correct mortar. It is safer and more reliable to use a roofer with proper access equipment.
Q6. Do loose ridge tiles cause leaks?
Answer: Yes. Once a ridge tile loosens, the seal at the top of the roof is broken, and wind-driven rain gets straight into the roof space beneath. From there it soaks timbers and insulation and shows as damp on top-floor ceilings. Loose ridge tiles are worth fixing promptly.