Walk down Redland Road, Cranbrook Road, or Coldharbour Road and look up. Almost every property has two or three chimney stacks rising above the roofline — a defining feature of the Victorian terrace that dominates BS6's housing stock. These stacks were built between 1875 and 1910, which makes them 115 to 150 years old. They have been standing through every South West winter since then, bearing south-westerly Severn Estuary weather with no shelter from surrounding buildings on the exposed sides.
At this age, the question isn't whether a Redland chimney stack needs attention — it's how much attention and what kind. The most common mistake we see is Portland cement repointing applied to Victorian brickwork that needs lime mortar. The second most common is lead flashing that has been siliconed over rather than properly replaced. Both look like a repair has been done. Neither solves the underlying problem — and both cause progressive long-term damage.
We use 4K drone surveys to inspect every chimney stack before quoting. You see exactly what's wrong before any work is agreed.
Chimney Repointing — Lime Mortar
The only correct specification for Redland's Victorian chimney stacks. We cut out all failed or cement-contaminated mortar joints and repoint in lime mortar — flexible, breathable, and appropriate for pre-1920 masonry. Never Portland cement. Not on a Victorian BS6 property.
Lead Flashing Repair & Replacement
The junction between chimney stack and slate roof slope is sealed in lead. On Redland's Victorian terraces this lead is frequently original — cracked, lifted, or siliconed over by a previous contractor. We install Code 4 step flashings and Code 5 cover flashings, correctly dressed and wedged into the mortar joint. Silicone is a temporary fix that fails within two to three winters. Lead properly installed lasts 60+ years.
Flaunching Repair & Replacement
The mortar crown that holds chimney pots in place on Redland's Victorian stacks deteriorates under Bristol's freeze-thaw cycles. Cracked or shrunk flaunching allows water directly into the flue and down into the chimney breast. We replace in waterproof mortar correctly crowned to shed water away from the pot base.
Chimney Pot Replacement
Cracked, leaning, or missing pots on Redland's stacks. We source matching terracotta profiles for Victorian properties — the standard red octagonal pot common across BS6 is readily available — and always specify new flaunching as part of any pot replacement.
Full or Partial Chimney Stack Rebuild
Where spalling, structural movement, or long-term moisture ingress has progressed beyond repair, we carry out full or partial stack rebuilds in matching brick with lime mortar throughout. On a shared terrace stack, we always advise on Party Wall Act obligations before work begins.
Chimney Removal
For unused chimney stacks on Redland terraces where internal space is being reconfigured — loft conversions are common across BS6 — we remove the external stack below the roofline and close the gap with matched reclaimed Welsh slate. Done correctly, it's invisible from the street.
Lime Mortar — Always, Without Exception
We never use Portland cement on a Victorian Redland chimney stack. Lime mortar is the only specification we use on pre-1920 brickwork across BS6. If a roofer is proposing cement repointing on your Victorian terrace, ask them to justify it — they won't be able to.
Free 4K Drone Survey on Every Quote
On a three-storey Redland terrace, a ground-level chimney assessment sees the bottom third of the stack at best. Our drone surveys the full stack — pot, flaunching, all four faces of brickwork, lead flashing junction — in high definition. You see the actual condition before we quote.
20 Years on Redland's Victorian Stock
Thomas Doherty has been working on chimney stacks across BS6 for over 20 years. The twin and triple stack configurations common on Redland's larger semis, the specific brick profiles used in the 1880s and 1890s, the lime mortar mixes appropriate for this age of construction — this is detailed knowledge built over two decades of consistent work in the area.
10-Year Workmanship Guarantee
Every chimney repair is backed by a full 10-year workmanship guarantee. Fully insured, Checkatrade vetted.
Portland Cement Repointing on Victorian Brickwork
The most damaging and most common finding across Redland's chimney stacks. The soft Victorian brick used in BS6's terrace rows needs a mortar that flexes with the building as it expands and contracts through seasonal temperature changes. Portland cement is rigid — it cracks under thermal movement, opens gaps at the brick face, traps moisture behind the joint, and causes the brick faces to spall progressively over years. We cut out all cement contamination and repoint correctly in lime mortar. It's more expensive than slapping cement over the top. It's also the only repair that lasts.
Silicone Over Failed Lead Flashing
We find this on a significant proportion of Redland chimney inspections — a previous contractor has applied silicone sealant over lifted or cracked lead flashing rather than replacing it. Silicone adheres well initially and appears to solve the leak. Within two to three winters, UV degradation and thermal movement cause it to crack and peel away, often leaving the underlying lead in worse condition than before because the silicone prevented inspection of the deterioration beneath it. The only correct repair for failed lead flashing is replacement.
Loose or Rocking Chimney Pots
Redland's prevailing south-westerly wind catches chimney pots projecting above the roofline on the exposed west and south-west elevations of BS6 terraces. When the flaunching bed beneath them deteriorates — cracking and shrinking as the mortar ages — pots begin to rock in wind. A rocking chimney pot on a tall Redland terrace above a busy pavement is a public safety issue that should be treated as a priority.
Damp Chimney Breasts Inside the Property
A chimney breast that's damp on the interior wall — particularly at upper floor level — is almost always a sign of external stack failure rather than an internal problem. The most common sources are failed flaunching allowing water into the flue, lifted lead flashing at the roof junction, or failed pointing allowing moisture directly through the brick. We identify the external failure point during the drone survey before recommending any repair.
My chimney was repointed recently but there's still damp inside — why?
The most likely explanation is that the repointing was done in Portland cement rather than lime mortar. Cement repointing on Victorian brickwork cracks under thermal movement within a few winters — it appears solid on the surface while water penetrates through the cracks and saturates the brick behind. We cut out all cement contamination and repoint correctly in lime. That's the only repair that addresses the actual cause.
My chimney stack is shared with the neighbouring terrace — does that cause any complications?
Yes. Shared chimney stacks on Bristol terraces are Party Structures under the Party Wall Act 1996. For significant repair work or removal, you're required to notify your neighbour in writing before work begins. We advise on Party Wall obligations as part of the survey on any shared stack repair or removal project.
My chimney pot is visibly leaning — how urgent is this?
On a tall Redland terrace above a pavement or public street, a leaning or rocking chimney pot is a priority safety issue. Treat it as urgent — call us for a same-day assessment.
Do you offer same-day emergency callouts in Redland?
Yes. Call 0117 370 9986 for same-day response across BS6.
Chimney problem in BS6? Call Thomas directly. Free 4K drone inspection, fixed written quote, no obligation and no pressure.
Contact TD Roofing Contractors today for your no-obligation professional chimney assessment.
We don’t just "patch leaks." At TD Roofing we deliver engineered solutions specifically designed to withstand the high-velocity winds of the Severn Estuary. Every project is executed strictly to BS 5534 standards, ensuring your home has the maximum wind resistance and structural longevity required for the Bristol climate.
TD Roofing Contractors are your local roofing contractors in Bristol, providing 20+ years of expert service. From emergency roof repairs to new slate installations, we cover all BS postcodes with quality and integrity.
Copyright © 2026 TD Roofing Contractors LTD. All Rights Reserved.
Web Design by Tradesman Marketing Experts