Quick Answer
Roof repointing means replacing the mortar that beds and secures ridge tiles, hip tiles, and verge tiles. It costs £500–£1,500 for a typical ridge repoint in 2026 and is one of the most important maintenance jobs on a pitched roof — failing mortar is a leading cause of loose ridge tiles and water ingress.
Roof repointing is one of those maintenance tasks that many homeowners have never heard of until a ridge tile comes loose — or crashes off the roof entirely. In 2026, failed ridge mortar is one of the most common causes of roof leaks and structural damage in UK homes. This guide explains what repointing involves, how to spot when it is needed, what it costs, and the difference between traditional mortar and the modern dry-fix alternative.
In this guide
What Is Roof Repointing?
On a pitched roof, ridge tiles run along the apex — the highest horizontal line of the roof. Hip tiles run diagonally down the corners. Verge tiles run along the sloping edges. All of these are traditionally bedded and pointed in mortar — a sand and cement mix that holds them in position and seals the gaps between them and the underlying tile courses.
Over time, this mortar deteriorates. Frost-thaw cycles, UV exposure, and thermal movement all cause cracking, shrinkage, and eventual failure. When the mortar fails, ridge and hip tiles become loose — and this is when problems begin:
- Water penetrates under loose tiles, causing leaks and timber rot
- Loose ridge tiles can dislodge completely — a safety hazard and a potential insurance event
- Wind gets under loose verge pointing, progressively undermining more of the roof edge
Repointing means raking out the old, failed mortar and applying fresh mortar to resecure and reseal the affected tiles. It is a maintenance job that extends the life of an otherwise sound roof by many years.
Signs You Need Roof Repointing
From the ground (use binoculars if needed), look for these warning signs:
- Gaps in the mortar along the ridge — Visible gaps or missing sections of pointing at the ridge line
- Ridge tiles that look out of alignment — A ridge line that appears wavy, with tiles at slightly different heights, indicates the mortar bed has failed
- Crumbling or powdery mortar — If you can see the texture of deteriorated mortar from the ground, it needs attention
- Vegetation growing in the ridge — Moss and weeds take root in deteriorated mortar, accelerating its breakdown
- Water ingress at ceilings near the ridge — Damp patches at the top of a room below the ridge are a strong indicator of failed pointing
- A roofer's inspection report — Any professional roof survey should assess the condition of pointing as standard
A ridge tile that is visibly loose or displaced is an urgent issue. A loose ridge tile can fall without warning — from heights of 6 metres or more — and the consequences can be catastrophic. If you spot a loose ridge tile, call a roofer promptly and keep people away from the area below. This could also be the source of the roof leak you are investigating.
Cost of Roof Repointing in 2026
The cost depends primarily on the length of ridge/hip/verge to be repointed and the access required:
| Job | Typical Cost (2026) | Notes |
|---|---|---|
| Ridge repoint — 3-bed semi (mortar) | £500–£900 | Typically 8–10m of ridge |
| Ridge repoint — 4-bed detached (mortar) | £700–£1,200 | Longer ridge line, more tiles |
| Hip and ridge repoint (full) | £800–£1,500 | Includes diagonal hip tiles |
| Verge repoint — full perimeter | £400–£900 | Depends on perimeter length |
| Dry-fix ridge system (full replacement) | £1,200–£2,500 | No mortar — mechanical fixing system |
| Single loose ridge tile reset | £100–£250 | Emergency repair, includes access |
Most roofers will include scaffolding or a tower in their quote for repointing work — make sure this is explicit. A quote without scaffolding for a two-storey roof should raise questions about how the work will be carried out safely. For broader context on roof repair costs, see our roof repair cost guide. And if you need to check a roofer's credentials before booking, our roofer vetting guide explains exactly what to look for.
Dry-Fix vs Mortar: Which Is Better?
Traditional mortar bedding has been the standard for ridge tiles for over a century. But dry-fix ridge systems — which mechanically fix ridge tiles using PVC or aluminium clips, ventilated components, and foam mortar fillers rather than sand and cement — have become the preferred approach in new work and many re-roofing projects.
The advantages of dry-fix:
- Tiles are mechanically secured and cannot come loose due to mortar failure
- The system accommodates thermal movement — less risk of cracking
- Ventilated ridge systems improve loft ventilation
- No ongoing maintenance of mortar joints
- Most manufacturers now specify dry-fix for new installations
The main downside is cost — dry-fix systems are more expensive than mortar repointing. However, when you factor in that dry-fix requires no future maintenance visits for pointing, the long-term cost advantage is clear. If you are having a new roof installed, our pointing and brickwork cost guide covers wider pointing work that might be needed alongside roofing work.
Frequently Asked Questions
How often does a roof need repointing?+
Traditional mortar bedding typically lasts 15–25 years before needing attention. Factors like frost exposure, the quality of the original mortar mix, and thermal movement all affect how quickly it deteriorates. A professional roof inspection every 10 years should assess pointing condition as standard.
Can I repoint my own ridge tiles?+
Working at ridge height is extremely dangerous without proper access equipment — scaffolding or an access tower. The materials are also specific (the mortar mix must be correct, and some tiles are heavy and awkward). Ridge tile repointing is not a DIY job for most homeowners.
What is the difference between repointing and re-bedding?+
Repointing means replacing the pointing (the visible mortar joint between tiles). Re-bedding means fully removing and re-laying the mortar bed that the tile sits on. Ridge tiles often need both done at the same time if the bedding mortar has failed significantly. Your roofer should specify which they are quoting for.
Are loose ridge tiles covered by home insurance?+
If a ridge tile has been displaced or lost due to a storm, this is often covered as storm damage by home insurance. Gradual mortar deterioration from age and weather (general wear and tear) is typically excluded. Contact your insurer before arranging repairs if the cause could be storm-related.
My ridge tiles are still in place but there are gaps in the mortar — is that urgent?+
Gaps in ridge pointing are important to address but not necessarily an emergency if the tiles themselves are still sitting firmly. However, every winter of frost-thaw cycles will widen those gaps further. Getting repointing done before the next winter is sensible — do not leave it another year.
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