Ridge tiles sit at the very top of your roof and are held in place by mortar. Over time, that mortar cracks, crumbles and lets in water — which can cause tiles to slip and leaks to develop. Repointing is the solution, and it's a job best left to a professional roofer. Here's what it costs.
How much does ridge tile repointing cost?
Ridge tile repointing in the UK typically costs between £600 and £2,500.
Typical prices:
The price depends on the length of the ridge, how many ridges your roof has, the number of tiles that need repositioning, and whether scaffolding is required.
What does ridge tile repointing involve?
Repointing is the process of removing old, failed mortar from around the ridge tiles and replacing it with fresh mortar to resecure the tiles and seal them against water ingress.
A full repointing job typically includes: - Removing all loose and crumbling mortar - Inspecting each ridge tile for cracks or damage - Relaying any displaced tiles - Applying fresh mortar and bedding tiles back into place - A weatherproofing finish to the mortar joints
Some contractors now use dry-fix ridge systems as a modern alternative to mortar — these tend to last longer and are less prone to cracking, but cost more upfront.
Signs that you need ridge tile repointing
It's worth getting a roof inspection if you notice any of the following:
- Cracked or crumbling mortar along the ridge line
- Ridge tiles that look raised, shifted or wobbly
- Damp patches in the loft, particularly around the ridge
- Tiles or pieces of mortar in the gutters or on the ground
- Visible gaps between ridge tiles and the main roof tiles
Left unaddressed, failed ridge mortar can allow water to penetrate the roof structure, causing damage to the underlying timber and insulation.
What affects the price?
Length of ridge: Longer ridges mean more material and labour time.
Number of ridges: Hipped roofs have multiple ridge lines, increasing the total scope.
Condition of existing tiles: Heavily damaged or displaced tiles add to the job.
Access: Scaffolding adds £200–£600 depending on how much is needed.
Dry-fix vs mortar: Dry-fix ridge systems cost more but last significantly longer and don't require the same maintenance.
Location: As with all roofing work, prices are higher in London and the South East.
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Frequently asked questions
How long does ridge tile repointing last?
Good quality mortar repointing should last 15–20 years. Dry-fix ridge systems can last 30+ years and are increasingly preferred by roofers for their durability.
Can I leave failed ridge mortar untreated?
Not for long. Failed ridge mortar allows water ingress that can damage roof timbers, insulation and even ceilings below. Loose ridge tiles are also a safety risk in high winds. It should be addressed promptly.
Do I need scaffolding for ridge tile repointing?
In most cases, yes. Working safely at ridge height requires proper access equipment. Any reputable roofer will insist on this — be wary of anyone who doesn't.
Does ridge tile repointing require planning permission?
No. Repointing is a like-for-like maintenance repair and does not require planning permission.
Should I get ridge tiles repointed at the same time as a roof clean?
Yes — it's efficient and cost-effective to do both at the same time. Scaffolding is already in place, and the roofer can assess the full condition of the ridge while carrying out the clean.