Chimney Repairs in CoventryRebuilds, Cowls & FlashingsStopping Leaks at Source

Chimney repair work covers everything above the roof line: brick repointing or rebuilds, replacement of cracked flaunching (the mortar cap around the pot), pot replacement, cowl fitting, lead flashing renewal, and where the stack is compromised, a full below-roofline rebuild. Each is a distinct fix, we identify which of them your chimney actually needs.

Homeowners with a damp patch on the chimney breast that keeps returning, buyers whose survey has flagged chimney condition, landlords managing tenanted properties, and anyone with a chimney that visibly leans, has open joints, or has lost bricks.

You need chimney repair when there's damp on internal chimney breasts, when mortar joints are open or missing, when flaunching is cracked and gapping around the pot, when the stack is leaning or has moved, when pots are cracked or unstable, or when birds/squirrels have made a nest in an open flue.

Chimneys are working at height in wind exposure, and every layer of the stack (bricks, mortar, flaunching, flashings, pot, cowl) is a potential leak. Diagnosing which layer is failing needs drone photography, not guesswork, and rebuilding a stack safely needs scaffold access, PASMA training, and lead work skills. All of which we bring as standard.

Rendering over cracked brickwork

A skim of render hides cracked joints for one summer, then falls away in sheets by the next winter, leaving a worse-looking chimney than you started with.

New pot on old flaunching

Fitting a new pot into cracked flaunching guarantees the pot moves in the first storm. The correct fix breaks out and re-forms the flaunching around a securely bedded pot.

Ignoring a leaning stack

A lean of more than 25mm is a structural issue, not a cosmetic one, the stack is being pushed by frost expansion in saturated brickwork. Left, it eventually needs demolition rather than rebuild.

Open flue, no cowl

Uncapped flues attract birds, squirrels and rain, all of which stain and damage the chimney breast internally. A £120 anti-downdraught cowl solves it.

Step 1

Free Drone Inspection

We fly a drone across the entire roof, ridge, valleys, verges, flashings and gutter line, capturing high-resolution photography. No ladders leaning against your walls, no guesswork, no call-out fee.

Step 2

Written Diagnosis

You receive a written report with annotated photographs showing exactly what we've found: the condition, the cause, and the specific work required to fix it properly rather than paper over it.

Step 3

Fixed, Itemised Quote

An itemised written quote, materials, labour, access, waste removal, VAT, with clear deposit terms. Domestic jobs under £2,000 need no deposit. Stage payments available on larger projects.

Step 4

Clean, Guaranteed Execution

Lyndon and the four-man crew arrive on time, protect your driveway and garden, work to PASMA/IPAF safe-access standards, and leave the site clean each evening. All workmanship is guaranteed.

Step 5

Final Sign-Off

Once the job is complete we walk the property with you, share drone photography of the finished work, and provide a workmanship guarantee in writing. Your invoice is emailed the same day.

Damp patch actually stops

By diagnosing all four leak paths, brick, mortar, flaunching, flashing, we fix the source, not the visible symptom.

Structural rebuild option

Where the stack has moved beyond repair, we rebuild from the roof line up with matching bricks, new flaunching, new pot and new lead flashings, all in one visit.

Correct lead flashings

Every chimney repair includes checking and, where needed, renewing back gutter, side flashings and front apron in code 4+ lead, the LSA-standard detail.

Cowls fitted to spec

Anti-downdraught, bird-guard, rain-cap or disused-flue cowls, matched to whether the flue is in use, capped, or on a working stove.

Scaffold-based safety

Chimneys are not ladder work. We use a proper scaffold or MEWP for every stack, with edge protection and lifting gear for bricks and pots.

Written guarantee

All chimney workmanship is guaranteed in writing.

The four leak paths

1) Bricks: fired clay bricks absorb water once the mortar around them fails; frost cycles then crack them. 2) Mortar joints: lime or cement mortar breaks down after 40–60 years; open joints admit water directly. 3) Flaunching: the mortar cap around the pot cracks and lets water down the outside of the pot into the flue void. 4) Flashings: failed lead lets water down inside the stack against the roof, hidden until it appears internally.

Repair vs rebuild decision

Localised damage, a few open joints, a cracked pot, a failed flashing, is a repair. Structural movement (lean over 25mm), extensive brick face spalling, or missing bricks means the stack needs rebuilding from a sound course. Drone photography and a physical inspection tell us which.

Methods and materials

Repointing: rake out to 25mm depth, brush clean, repoint with matched mortar (typically 1:1:6 cement:lime:sand for post-1919 property, hydraulic lime NHL 3.5 for older). Rebuilds: match existing bricks or source reclaimed; bed in matched mortar to same proportions; flaunching in 1:3 cement:sand with pot bedded on lead sole. Flashings: code 4 lead, LSA-detail, chased 25mm into brick joint.

Residential vs commercial

Residential chimneys: single or twin-stack terraced, semi and detached, 1–3 days for a full repair, 3–5 days for a rebuild. Commercial: factory or industrial stacks and boiler flues, usually MEWP access and phased around production. Both use the same diagnostic approach.

Related services

While we're on the roof,
we handle all of this too.

"Excellent service. Lyndon explained the damage and the work needed and their quotes were reasonable. Honest, open communication and did everything they said they would."

, Naheed Khan, Google review