Specialist chimney repointing across Bath from 250 pounds per stack. NHL lime mortar for Bath stone and heritage stacks, flaunching renewal, cowls and capping. We survey all four faces, not just the one you can see.
Chimney repointing in Bath costs 250 to 800 pounds per stack depending on height and access. Bath stone and limestone chimneys must be repointed in NHL lime mortar, never cement, which would spall the soft stone. We also renew flaunching, fit cowls, and cap disused stacks.
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Honest advice
Do You Actually Need Chimney Repairs?
Chimney trouble shows as damp on the breast inside, crumbling mortar, or a leak where the stack meets the roof. On Bath's soft stone stacks, eroded lime pointing and failed lead are the usual causes.
Damp staining on the chimney breast inside the house
Crumbling or missing mortar in the stack
A leak in the ceiling near the chimney
Loose or leaning pots
Vegetation growing from the stonework
When it is not the answer: If only the flaunching or a length of flashing has failed, you don't need a full rebuild — a targeted lime repair is far cheaper and keeps the original stack. Read the full guide.
Chimney lead weatherproofing: flashing, apron and back gutter
Chimney Repointing in Bath
Specialist Chimney Repointing Across Bath
Chimney repointing is the renewal of the mortar joints between the bricks or stones of a chimney stack. Exposed on all sides at the highest, most weather-beaten point of the roof, chimney mortar erodes faster than anywhere else on a building. Once the joints open up, water gets into the stack, and freeze-thaw action through a Bath winter accelerates the decay. Repointing a stack in Bath typically costs 250 to 800 pounds depending on its height, the number of faces, and the access required.
This is a distinct job from general chimney repair, and on Bath's properties it is a specialist one because of the stone. A large proportion of Bath's chimneys are built of Bath stone or a similar soft limestone, and these cannot be pointed with ordinary cement mortar. Doing so is one of the most damaging mistakes made on the city's period buildings.
Our Process
Our Chimney Repointing Process
Survey all four faces. We inspect every face of the stack, not just the one visible from the street, as the weather-facing and north sides deteriorate fastest and are often the worst.
Rake out the old mortar. We carefully rake out the failed and eroded joints to a sound depth without damaging the surrounding stone or brick arris.
Repoint in the correct mortar. We repoint in NHL lime mortar for stone and limestone stacks, or a suitable flexible mix for post-war brick, matching the joint profile and colour.
Renew flaunching and fit cowls. We renew the flaunching that beds the pots, fit or replace cowls to prevent rain and bird ingress, and cap disused stacks where required.
Pricing
Chimney Repointing Prices in Bath
Service
Typical Bath price (2026)
Repoint standard stack (per stack)
£250 – £650
Repoint tall / multi-face stack
£600 – £800+
Renew flaunching (bed the pots)
£150 – £350
Fit / replace cowl (each)
£80 – £180
Cap disused stack (weatherproof)
£200 – £500
Full stack rebuild (per specification)
priced after survey
Prices per stack, scaffolding or access quoted separately where required. Lime mortar work on Bath stone and heritage stacks is priced to the specification the property needs.
Historic England guidance: Historic England guidance is clear that soft limestone such as Bath stone must be pointed in lime mortar, as hard cement traps moisture and causes the stone face to spall and erode irreversibly.
Chimney mortar crumbling or damp on the breast in Bath? Get a free four-face stack survey and a fixed-price quote.
The defining fact about repointing chimneys in Bath is the stone. Bath stone is a soft oolitic limestone that breathes — it takes up and releases moisture through its surface. Point it in hard cement mortar and the cement traps moisture inside the stone, which then has nowhere to go but out through the stone face itself, blowing off the surface layer in a process called spalling. Within 10 to 20 years a cement-pointed Bath stone stack shows crumbling, hollowed stone faces that cannot be undone. NHL lime mortar flexes with the stone and lets it breathe, which is why it is the only correct choice.
Exposure is the other Bath factor. Chimney stacks on the city's hillside terraces — the steep streets of Widcombe, Beacon Hill and the upper reaches of Lansdown — catch the prevailing south-westerly weather with no shelter, and their stacks decay years ahead of more sheltered properties. The weather-facing and north faces are always worse than the street elevation, which is why we survey all four faces of every stack rather than quoting on the one you can see from the pavement.
Conservation and listed status apply to chimneys just as they do to roofs. On listed Bath properties, repointing must use lime mortar matched in colour and joint profile to the original, and on some the work needs consent. Because the chimney is such a prominent feature of Bath's Georgian and Victorian roofscape, the conservation authority takes its appearance seriously, and a cement-pointed stack on a listed terrace is both a technical and a planning problem.
The process
How a Bath Chimney Repairs Job Runs
1. Four-face survey
We inspect every face of the stack — the weather-facing sides erode faster than the one you see — and photograph the faults.
2. Written quote
We quote the repointing, flashing, flaunching or rebuild needed, using lime mortar for Bath's soft stone, at a fixed price.
3. Scheduling & access
We book the work and arrange the tower or scaffold access a stack needs for safe standing time.
4. The work
We rake out failed mortar, repoint in matched NHL lime, renew lead flashing and flaunching, and re-bed pots as needed.
5. Cleanup & sign-off
We clear debris, leave the stack weathertight, and hand over your guarantee.
Timescales
Job Durations at a Glance
Job
Typical duration
Re-flaunching / re-bed pots
Half a day
Lead flashing renewal
Half to full day
Stack repointing (lime)
1–2 days
Partial stack rebuild
2–3 days
Full stack rebuild
3–5 days
Lime mortar needs frost-free conditions to cure properly, so we schedule stack work around cold snaps in winter.
Access
Getting Safely onto Bath Roofs
Chimney work almost always needs a tower or scaffold for safe standing time at the ridge — itemised in your quote, never a hidden extra. Scaffold is specified for: nearly all stack work — safe access to the ridge is essential and always specified - 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 Chimney Repairs Costs in Bath
Job
Typical range
Notes
Re-flaunching / re-bed pots
£150–£350
Per stack
Lead flashing renewal
£250–£600
Stack-to-roof junction
Stack repointing (lime)
£350–£850
Four faces, NHL lime
Partial stack rebuild
£800–£2,000
From roofline up
Full stack rebuild
£1,800–£4,000+
Incl. scaffold
What moves the price
Soft Bath stone requiring NHL lime mortar, never cement
How many faces of the stack have failed (weather sides worst)
Access height and scaffold vs tower for safe standing time
Whether pots, flaunching and flashing all need renewal
Worked example: Repointing all four faces of a soft-stone stack in lime plus renewing the lead flashing on a Widcombe hillside terrace: around £900 including tower access.
No deposit on smaller chimney repairs. Staged payment on rebuilds, balance on completion — nothing before materials are on site. VAT included.
Covering BA1, BA2 and surrounding postcodes.
Guarantee
Your Guarantee, Explained
Chimney workmanship is guaranteed for 10 years, extending to rebuilds and full repointing; because we use correct NHL lime, the work lasts rather than damaging the stone as cement does.
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
Stack work means access equipment up for a few days and some mess at the base — we sheet and protect below, and clear everything on completion. You do not need to stay home for external work - we just need power and access agreed in advance.
Lime pointing waits for frost-free weather to cure; we won't point a stack into a cold snap and risk the mortar failing. Bath's valley setting holds humidity, so north-facing slopes dry slowly and moss builds up through autumn.
Customer Reviews
What Bath Homeowners Say
★★★★★
Our stack on the hill catches all the weather and the mortar was washing out. They pointed all four faces in lime, not just the front, and renewed the flaunching. Proper heritage job.
Christopher H., Widcombe
★★★★★
The previous owner had cemented the chimney and the Bath stone was starting to blow. They raked it out, went back to lime and it looks right for the house now. Knowledgeable about the stone.
Diane R., Lansdown
★★★★★
Repointed the stack and capped a disused flue that was letting rain in. Clear about what each part cost. No damp on the chimney breast since.
Nigel P., Bathwick
Common Questions
Frequently Asked Questions
Repointing a standard chimney stack in Bath costs 250 to 650 pounds, and a tall or multi-face stack 600 to 800 or more. Renewing flaunching adds 150 to 350, and fitting cowls 80 to 180 each. Access is quoted separately where scaffolding is needed.
Bath stone is a soft limestone that must breathe. Cement mortar traps moisture inside the stone, forcing it out through the face and causing the surface to spall and crumble irreversibly. We use NHL lime mortar, which flexes with the stone and lets it breathe.
Signs include crumbling or missing mortar between the stones or bricks, staining or damp on the chimney breast inside, and vegetation growing from the stack. If mortar can be scraped out easily with a screwdriver, the stack is due for repointing.
Flaunching is the mortar fillet that beds the chimney pots into the top of the stack. It cracks and washes out over time, letting water into the stack and loosening the pots. If it is cracked or missing, it should be renewed alongside repointing.
Capping a disused stack keeps rain and birds out while allowing some ventilation to prevent condensation inside the flue. We fit weatherproof caps or vented cowls that protect the stack without sealing it completely, which would risk damp.
On listed buildings, repointing must use lime mortar matched to the original, and some work requires listed building consent. We advise on what BANES requires and carry out the work to conservation standards so it is both correct and compliant.
Lime-pointed stonework, correctly done, lasts several decades — often 40 to 60 years — before it needs attention again. The key is using the right mortar for the stone; a correct lime repoint outlasts a cement one that will have failed and damaged the stone within 20 years.
