Most Bath roof repairs trace back to a handful of failure points: a slipped slate, cracked mortar, or tired lead flashing letting water past. The tell-tale signs usually show inside before the roof looks obviously wrong.
A damp patch or brown stain on an upstairs ceiling after rain
A slate or tile lying in the garden or gutter
Daylight visible in the loft, or wet felt and timbers
Mortar crumbling from ridge or verge
Water tracking down a chimney breast
When it is not the answer: If more than about a third of the covering has failed and slates lift by hand across the whole slope, repairing tile-by-tile is money wasted. Read the full guide.
Cross-section of a pitched roof showing where leaks start
Ridge tile mortar failure is one of the most common roof repair calls across Bath. It affects all housing eras — from lime mortar bedding on Victorian Welsh slate roofs to cement bedding on post-war concrete interlocking tile roofs. Left unaddressed, loose ridge tiles create an open gap at the ridge line that allows wind-driven rain, birds and debris into the roof void. In winter, shifting or displaced ridge tiles are the most frequent emergency call type across Bath's post-war housing.
Ridge Re-Bedding on Post-War Bath Housing
The concrete interlocking tile housing in Twerton, Foxhill, Whiteway, Keynsham and Midsomer Norton has ridge tiles bedded in cement mortar now 40 to 70 years old. This mortar carbonates over time, losing its bond and allowing tiles to shift under wind load. Full ridge re-bedding in flexible mortar is the correct repair — we never spot-point individual joints on a deteriorated ridge as this provides only short-term improvement before the surrounding mortar fails in turn.
Ridge Work on Victorian Welsh Slate Roofs
Victorian Welsh slate roofs in Bath use a ridge board with clay or concrete ridge tiles bedded in lime mortar. The lime mortar has typically lasted well but on older properties is now beginning to fail on exposed ridges. We re-bed in lime mortar on all stone and traditional masonry properties. Matching ridge tile profiles are sourced for conservation area and listed building work.
Ridge Repair Costs in Bath
Ridge re-bed (per metre): £25–£45 Full ridge run (3-bed semi): £250–£500 Individual ridge tile replacement: £40–£100 Hip tile replacement and re-bed: £40–£80 per tile Free quotes for all ridge work.
For ridge tile repairs in Bath call 0122 528 7924. Same-day emergency response available.
Why Ridge Tiles Fail
Understanding Ridge Failure on Bath Roofs
The Mortar Carbonation Process
Cement mortar used for ridge tile bedding on post-war Bath housing undergoes carbonation over time — a chemical reaction where calcium hydroxide reacts with atmospheric CO2 to form calcium carbonate. This process is unavoidable and reduces the mortar's tensile bond strength progressively. After 20 to 30 years, cement ridge mortar has typically carbonated to the point where it holds the ridge tiles in position under static load but provides minimal resistance to dynamic wind loading. The tiles are held by gravity until the first significant wind event.
Lime Mortar for Victorian Bath Roofs
Victorian Welsh slate roofs in Bath use a ridge board with clay or concrete ridge tiles bedded in lime mortar. Lime mortar does not undergo the same carbonation process as cement — it actually gains strength slowly over decades as carbonation converts calcium hydroxide to calcium carbonate in a controlled way. A correctly mixed lime mortar ridge bed on a Victorian Bath property can remain serviceable for 60 to 100 years. We re-bed Victorian ridge work in NHL 3.5 lime mortar, never in cement.
After the Re-Bed — What to Inspect
After ridge re-bedding, we inspect the near-ridge slates or tiles for any that have displaced or cracked, repoint any verge sections that are deteriorated, and check the condition of the lead flashing at the nearest chimney. Ridge failure on a Bath property often reveals that surrounding details are also in need of attention — a comprehensive approach in one visit saves the cost of scaffold erection for follow-up work within 2 to 3 years.
Customer Reviews
Recent Jobs
★★★★★
“Ridge tiles lifting on our 1972 semi in Twerton — two had moved noticeably over the winter. Full ridge re-bed done in one visit, hips checked at the same time. Very efficient.”
Barry F. · Twerton, Bath
★★★★★
“Three ridge tiles blown off our Foxhill property in a January storm. Called Saturday morning, they confirmed Monday attendance and had matching tiles sourced and re-bedded by lunchtime.”
Shirley G. · Foxhill, Bath
★★★★★
“Ridge re-bed on our Victorian slate roof in Oldfield Park. They used the correct lime mortar, matched the ridge tile profile, and re-pointed the verge on both sides at the same time.”
Peter H. · Oldfield Park, Bath
The process
How a Bath Roof Repairs Job Runs
1. Survey
We inspect the roof inside and out, identify every fault, and photograph what we find so you can see it too.
2. Written itemised quote
You get a fixed-price quote listing each repair and the materials, with no call-out fee and nothing hidden.
3. Scheduling
We book a slot that suits you, usually within a few working days, and confirm access needs in advance.
4. The work
We carry out the repair with matching materials and correct fixings, keeping you updated as we go.
5. Cleanup & sign-off
We clear all debris, leave the site tidy, and hand over your written workmanship guarantee.
Timescales
Job Durations at a Glance
Job
Typical duration
Slipped or cracked slate refix
1–2 hours
Lead flashing repair
Half a day
Ridge or verge re-bed (per section)
Half to full day
Rear valley rebuild
2–3 days
Multiple-fault repair visit
1 day
Wet or high-wind days pause work at height — we build weather margin into every Bath booking and never leave a roof open.
Access
Getting Safely onto Bath Roofs
Most Bath repairs run from roof ladders or a tower; scaffold is specified only where the job needs safe standing time at height. Scaffold is specified for: chimney-side repairs, full valley rebuilds, and anything beyond a day at height - always itemised in your written quote, never a hidden extra, and we arrange it.
Bath's Georgian and Victorian terraces mean tight pavements, controlled parking, and rear-access scaffold on many streets. Pavement scaffold and skip permits go through Bath & North East Somerset Council; allow a few working days on streets like Milsom Street, Broad Street, Margaret's Buildings where space is tight.
Pricing
What Roof Repairs Costs in Bath
Job
Typical range
Notes
Slipped/cracked slate refix
£150–£350
Per visit incl. access
Lead flashing repair
£250–£600
Chimney or abutment
Ridge/verge re-bed
£300–£700
Per section, lime mortar
Valley repair or rebuild
£450–£1,200
Depends on length
Multiple-fault repair day
£600–£950
Full day, two roofers
What moves the price
Roof height, pitch and access on Bath's taller terraces
Whether lime mortar and matching Welsh slate are needed (conservation stock)
Scaffold vs tower vs ladder for safe access
Extent of concealed damage found once opened up
Worked example: A slipped-slate refix plus a length of failed lead flashing on a Victorian terrace off the Wells Road: around £480 including tower access and matching slate.
No deposit on repairs under £500. You pay on completion once you're happy — never before the work is done. VAT included in every quoted figure.
Covering BA1, BA2 and surrounding postcodes.
Guarantee
Your Guarantee, Explained
Workmanship on the repaired section is covered for 10 years in writing; any replacement slates or tiles carry their manufacturer warranties on top.
Covered: workmanship for 10 years, in writing, transferable if you sell.
On top: manufacturer warranties on materials (terms vary by product).
Not covered: storm or impact damage - that is an insurance matter, and we will document it for your claim.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Good to know
What It Is Like While We Work
A repair is usually a day of ladder or tower work with a small amount of debris — we sheet below the work area and clear everything before we leave. You do not need to stay home for external work - we just need power and access agreed in advance.
Repairs run year-round; if rain stops work mid-job we fit temporary weatherproofing the same day so no more water gets in. Bath's valley setting holds humidity, so north-facing slopes dry slowly and moss builds up through autumn.
FAQ
Frequently Asked Questions
Ridge re-bedding costs 25 to 45 pounds per metre. A full ridge run on a 3-bed semi costs 250 to 500 pounds. Individual cracked tile replacement costs 40 to 100 pounds. Free quotes for all ridge work.
Most ridge re-bedding jobs on a standard 3-bed semi are completed in 3 to 5 hours. We can usually complete the work in a single visit.
Yes. We carry ridge tile profiles for concrete interlocking tile roofs and clay ridge tiles for Victorian and conservation area properties. We source matching profiles for like-for-like repair.
Lime mortar is used on all Bath stone, limestone and traditional brick properties. Flexible cement mortar is used on concrete interlocking tile housing. We never use rigid cement mortar on traditional masonry.
Yes. We offer same-day emergency response for displaced or missing ridge tiles that leave an open gap in the roof. Call 0122 528 7924 at any time.
Cement mortar bedding on post-war housing typically lasts 20 to 30 years before requiring re-bedding. Lime mortar bedding on Victorian properties lasts longer but should be inspected every 10 to 15 years. Exposed ridges on elevated locations like Bear Flat and Lansdown deteriorate faster.
No. We never charge a call-out fee. Free assessment on every job.
