Chimney Repairs in London
City Building and Roofing Ltd carry out all types of chimney repairs across London and Surrey. Repointing, lead flashing, stack repairs and full rebuilds — City & Guilds trained team.
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Chimney repairs and roof refurbishment restore the weatherproofing and appearance of a tired roof and chimney without a full rebuild. City Building and Roofing Ltd repoint and rebuild chimneys, renew lead flashing and refurbish roofs across London and Surrey — including cleaning, repointing and replacing worn components — with free written quotes.
Your chimney is an important part of your roof structure — but it is also one of the most exposed elements of your property, subject to extremes of heat, cold, rain and frost. Over time, this weather exposure gradually deteriorates the materials a chimney is constructed from, affecting its structural integrity and appearance.
City Building and Roofing Ltd carry out all types of chimney repairs across London and Surrey. Our skilled tradesmen will ensure your chimney remains stable, safe and in good working order — from minor repointing through to complete chimney stack rebuilds.
All chimney repair work is carried out by City & Guilds qualified tradesmen, backed by written guarantees and £5,000,000 of public liability insurance. We offer free, no-obligation inspections — call us on 020 7118 0095.
Chimney Repair Services We Carry Out
Chimney Repointing
Cracked or deteriorated mortar between bricks allows water penetration which can seriously damage the chimney structure. Repointing removes the damaged mortar and replaces it with a fresh, weather-resistant mix.
Lead Flashing Repairs
Lead flashing seals the junction between your chimney and roof. Damaged or poorly fitted flashing is one of the most common causes of roof leaks. We repair and replace lead flashing correctly.
Chimney Stack Repairs
Loose or damaged brickwork at the top of the chimney stack is a common problem. We secure loose bricks, repair damaged sections and restore the structural integrity of your chimney.
Chimney Stack Rebuilds
Where a chimney has deteriorated beyond repair, a full or partial rebuild is required. Our tradesmen carry out complete chimney stack rebuilds to a very high standard.
Chimney Cap & Crown Repairs
The chimney cap and crown protect the top of your chimney from rain and debris. We repair and replace damaged caps and crown mortar to prevent water ingress.
Chimney Pot Replacement
We supply and fit replacement chimney pots — whether you need an exact match for a period property or a modern capping solution — fitted correctly and securely.
Signs Your Chimney Needs Repair
- Mortar or brick pieces falling into the fireplace or onto the roof
- Damp patches on the chimney breast inside the property
- Visible cracks or gaps in the mortar between chimney bricks
- Loose or displaced chimney pots
- Deteriorated or lifting lead flashing at the chimney base
- White staining (efflorescence) on the chimney brickwork
- The chimney appears to be leaning or no longer straight
Why Choose City Building and Roofing for Chimney Repairs?
- All chimney repairs carried out by City & Guilds qualified, experienced tradesmen
- Free chimney inspections available across London and Surrey
- We work on Victorian, Edwardian and modern period properties — matching original materials
- £5,000,000 public liability insurance
- Written guarantees on all chimney repair works
- Chimney repair services throughout London and the South East
- Competitive, transparent pricing — free written quotes before any work begins
Need a Chimney Repair in London or Surrey?
Call us today for a free inspection and no-obligation quote. We carry out chimney repairs across London — including Kensington, Chelsea, Fulham, Westminster and Central London.
Common Problems We Fix
Leaking flashing around the chimney
Failed lead or mortar flashing is the most common cause of chimney leaks. We renew the flashing and soakers so the joint is watertight.
Cracked crown and flaunching
The mortar crown that holds the pots cracks and lets water into the stack. We renew the flaunching and re-bed pots as needed.
Spalling brick and failed pointing
Frost and weather erode chimney brickwork and pointing. We rake out and repoint, or replace damaged bricks.
Leaning or unsafe stacks
A stack that is leaning or badly eroded may need partial or full rebuilding. We make it safe and rebuild to match.
Slipped tiles and worn components
Across the wider roof, refurbishment addresses slipped tiles, tired ridge mortar and worn flashings in one planned visit.
Moss, debris and blocked valleys
We clear moss and debris, free valleys and gutters, and treat the roof as part of a refurbishment.
How Our Process Works
Inspection
We assess the chimney, the flashing and the condition of the wider roof.
Written quote
A clear plan covering the chimney works and any roof refurbishment.
Safe access
Scaffolding or a tower is set up for safe working at height.
Carry out works
Repointing, flashing renewal, re-bedding and roof refurbishment as agreed.
Guarantee
A written workmanship guarantee, with insurance-backed cover on eligible works.
How Much Does It Cost?
Costs depend on the scope — a flashing renewal or repoint is at the lower end, while rebuilding a stack or refurbishing a whole roof costs more. Access is a major factor, as safe working on a chimney almost always needs scaffolding.
- The scope — repoint, reflash, re-bed or rebuild
- Whether the wider roof is refurbished at the same time
- Scaffolding and safe access to the stack
- The condition of the brickwork and flaunching
- Materials needed to match the existing roof and chimney
City Building and Roofing Ltd provide free written quotes before any work begins, across London and Surrey.
Get a Free Quote
Find City Building and Roofing Ltd on Google
Customers across London and Surrey can find City Building and Roofing Ltd on Google to read reviews, view recent work and contact the team directly. We recommend calling the correct local number for your area — Surrey enquiries on 01932 950 995 and London enquiries on 020 7118 0095.
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Areas We Cover
Frequently Asked Questions
Why is my chimney leaking?
Most chimney leaks come from failed flashing where the stack meets the roof, a cracked mortar crown or flaunching, or porous, spalling brickwork and open pointing. Occasionally the cause is a worn or missing chimney cap. A proper inspection identifies which it is, so the repair fixes the real problem.
How do I know if my lead flashing has failed?
Signs of failed flashing include damp patches on the ceiling or chimney breast, staining on the wall by the stack, lifted, cracked or slipped lead, and visible gaps where the flashing meets the brickwork. If you see any of these, the flashing should be inspected before water damages the structure.
Can damaged flashing cause damp?
Yes. Flashing seals the join between the roof and features such as chimneys, valleys and walls. When it fails, water runs straight into the structure, causing damp on ceilings and walls, rotten timbers and stained plaster. Renewing the flashing promptly stops the ingress at its source.
Do you repair chimney stacks?
Yes. We repoint and rebuild chimney stacks, renew flaunching and re-bed pots, replace spalled bricks and renew flashing. Where a stack is leaning or unsafe we can take it down to a safe height or rebuild it to match. All chimney work is carried out from proper scaffolding.
Can you repoint a chimney?
Yes. Repointing rakes out the old, eroded mortar joints and replaces them with fresh mortar, restoring the weatherproofing and appearance of the chimney. We use an appropriate mortar mix for the brickwork and, on older or period properties, can match traditional lime mortar where required.
Do I need scaffolding for chimney repairs?
In most cases, yes. Safe, lasting chimney work needs a stable working platform, so scaffolding or a suitable tower is almost always required. We include access in our written quote, and proper scaffolding also lets us inspect and address the surrounding roof at the same time.
Ready to Get Started?
Contact us today for a free, no-obligation quote. We serve all of London and Surrey with professional roofing and building services.
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