Chimney repair specialists covering Keynsham and the surrounding BS31 area. Repointing, lead flashing, pot replacement and stack rebuilding. Free no-obligation quotes.
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 Repairs in Keynsham
Chimney Repairs Keynsham
Keynsham's housing stock spans Victorian terraces in the town centre, 1970s to 1990s estate housing across Somerdale and surrounding streets, and more recent development on the town's fringes. Chimney repair requirements differ significantly between these eras. Victorian terraces in the town centre require lime mortar for Bath stone and local brick chimneys. Post-war properties use cement pointing throughout and are generally easier to repoint, but the older chimney stacks on 1970s properties are now showing significant mortar deterioration after 50-plus years of weather cycling.
Chimney Repointing in Keynsham
Chimney repointing is the most common chimney repair call from Keynsham. Mortar joints between courses deteriorate through frost cycling and wind-driven rain, allowing water to penetrate behind the flaunching and into the stack. On stone properties we always use NHL lime mortar matched to the original profile. On brick properties we match the existing mortar colour and texture. We never use cement mortar on traditional stone or soft brick as it causes irreversible damage through differential movement.
Lead Flashing Repairs in Keynsham
Lead step flashings and back gutters at chimney bases are the second most common chimney repair type in Keynsham. Failed flashings allow water to run behind the stack and into the roof structure, often appearing as a damp patch on the internal chimney breast before the external source is identified. We carry Code 4 and Code 5 lead for same-day or next-day flashing repair in most cases.
Chimney Repair Costs in Keynsham
Repointing (standard stack): £300–£700
Lead flashing replacement: £300–£800
Pot replacement & reflaunching: £150–£400
Stack rebuilding (per metre): £400–£1,000
Free quotes for all chimney work in Keynsham.
For chimney repairs in Keynsham call 0122 528 7924. Free assessment, no call-out fee.
Our Process in Keynsham
Chimney Repairs in Keynsham: How We Work
Free Assessment
Every chimney repairs job in Keynsham starts with a free assessment visit. We inspect the full roof condition — not just the reported problem — and give a written fixed price before any work starts. No call-out fee for the assessment. No obligation to proceed.
Local Knowledge
Keynsham's housing stock has specific characteristics that affect how chimney repairs work is specified and carried out. We have been working across BS31 for over 20 years and understand the local materials, construction methods, and planning requirements that apply to your property type.
What Good Completion Looks Like
At the end of every chimney repairs job in Keynsham we carry out a site check: confirm the work is complete, clear all debris, and ensure drainage is running correctly. You receive a written confirmation of the work done and a guarantee certificate. For any job over 500 pounds we provide a full written specification of materials and methods used.
The process
How a Keynsham 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 Keynsham 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.
Keynsham's Victorian terraces and 1930s semis off the High Street need tower or scaffold access; the town centre has controlled parking. Pavement scaffold and skip permits go through Bath & North East Somerset Council; allow a few working days on streets like High Street, Temple Street, Bath Hill where space is tight.
Pricing
What Chimney Repairs Costs in Keynsham
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 BS31 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. Sitting between the Avon and Chew valleys, Keynsham holds river-valley damp that accelerates moss on shaded roofs.
Customer Reviews
Recent Jobs
★★★★★
“Chimney repointing on our Victorian terrace. They matched the lime mortar correctly and re-flaunched both pots at the same time. No more damp on the chimney breast.”
R. Hamilton · Keynsham, BS31
★★★★★
“Lead back gutter behind the chimney was completely failed. New Code 5 lead properly dressed in one visit. Solved a problem that had been causing damp for two winters.”
Roger D. · Keynsham BS31
★★★★★
“Emergency chimney repair after high winds shifted the stack. They attended next morning, made it safe, and the full repointing was completed later that week. Professional and reliable.”
S. Bell · Keynsham, BS31
Pricing and Process
What to Expect from Chimney Repairs
How We Price Chimney Work
Chimney repair pricing is driven by three variables: height (which determines scaffold or access equipment cost), extent of mortar failure (how many courses need repointing), and lead specification (whether step flashings, back gutters, or saddles need replacement alongside the masonry work). We always inspect the full chimney — all four faces, not just the accessible street-facing side — before providing a quote. Work found on the less visible faces is included in the original quote, not added as a surprise on completion.
Mortar Matching on Period Properties
One of the most visible quality differentials between chimney repointing contractors is mortar colour matching. Lime mortar comes in a range from near-white to warm buff depending on the aggregate used, and Bath stone properties in particular show mismatched pointing very clearly. We carry iron oxide pigments and a range of aggregates to match the existing mortar colour as closely as possible. For listed buildings where the planning authority may inspect the completed work, we prepare a sample panel for approval before committing to the full stack.
After the Repoint — What to Check
A correctly completed chimney repoint should show no mortar smearing on the face of the brickwork or stonework, clean raked joints at a consistent depth, and a struck profile that matches the original. Flashings at the base should be dressed tight to the masonry with no visible gaps. Flaunching around pots should be smooth with no cracking. If you notice any of these issues after a repointing job, call the contractor back before the mortar has fully cured — remedial work on fresh lime mortar is straightforward; remedial work on hardened mortar requires breaking out and starting again.
FAQ
Frequently Asked Questions
Chimney repointing on a standard stack in Keynsham costs 300 to £700 depending on height, access and extent. Free quotes for all chimney work.
Yes, on all stone and soft brick properties. We use NHL 2 or 3.5 lime mortar matched to the original profile. Cement mortar is never used on traditional masonry as it causes stone damage through differential movement.
Yes. Lead step flashing, back gutter and apron flashing repair and replacement is a regular service across Keynsham. We carry Code 4 and Code 5 lead for same-day or next-day repair in most cases.
Signs include mortar visibly crumbling between courses, white lime efflorescence on the internal chimney breast, damp patches on the chimney breast wall, and chimney pots that have shifted. Any of these warrant a close inspection.
Yes. Full and partial chimney stack rebuilds are carried out across Keynsham using appropriate materials. For stone properties we use matching stone or locally approved brick with lime mortar throughout.
No. We never charge a call-out fee. You pay only for work carried out, quoted and approved before we start.
Yes. We cover Keynsham and surrounding BS31 24/7 for emergency chimney repairs. Call 0122 528 7924 at any time.
Free Keynsham Roofing Quote
No call-out fees. No obligation. Free assessment and honest quote before any work starts.
