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A damaged chimney can quickly lead to leaks, loose masonry and wider roof problems if it’s left untreated. At RJC Roofing & Building, we carry out professional chimney repairs across London, helping homeowners, landlords and property managers keep their roofs safe, weatherproof and structurally sound.

We deal with a wide range of chimney faults, from minor pointing repairs to more involved restoration work. Every job begins with a proper inspection so we can identify where the problem starts rather than only treating the visible signs.
Our chimney services include repointing, flashing repairs, replacement leadwork, brick repairs, chimney pot repairs, flaunching and partial rebuilding where sections have become unstable. We also carry out chimney roofing repairs where water is entering around the base of the stack or where nearby tiles, slates or mortar have failed.
Some customers contact us after noticing damp around a chimney breast. Others see cracked mortar, missing bricks or debris in the gutter below. Whatever the issue, we’ll explain what we’ve found and recommend a practical repair based on the condition of the chimney.

What Include
Mortar joints naturally wear over time, particularly on exposed chimney stacks. Once gaps form, water can enter the brickwork and cause further deterioration. Our chimney repointing work removes loose material and replaces it with fresh mortar suited to the existing structure.
Lead flashing seals the point where the chimney meets the roof. If it lifts, splits or pulls away from the masonry, rainwater can travel into the roof space. We carry out chimney flashing repairs using properly fitted leadwork designed to keep the junction watertight.
Older chimney stacks often show signs of weathering, frost damage or movement. We can replace damaged bricks, secure loose sections and rebuild unstable areas where necessary.
Our Process
We believe every successful roofing and building project starts with clear communication and careful planning. From your initial enquiry to the final inspection, our straightforward process ensures quality workmanship, complete transparency, and a hassle-free experience every step of the way.
We’ll discuss the problem you’ve noticed, such as staining, loose mortar, falling debris or water entering the property.
We inspect the stack, pointing, flashing, pots, flaunching and nearby roof covering to identify the source and extent of the damage.
Once we understand the condition of the chimney, we’ll explain the work required and provide a clear quotation.
The damaged areas are repaired using suitable materials and methods. This may involve repointing, leadwork, brick replacement or partial rebuilding.
We check the repaired area, clear away waste and make sure the chimney and surrounding roof have been left secure and weatherproof.
Expertise
Whether you need reliable roofing solutions or want to know why homeowners and businesses across London choose RJC Roofing & Building, you'll find everything here. Explore our professional services and discover our commitment to quality workmanship, honest advice, and exceptional customer care on every project.
London has a large number of older properties, and many chimneys have been exposed to decades of rain, wind and repeated patch repairs. Victorian and Edwardian terraces in places such as Islington, Camden, Hackney and Hammersmith often need a more careful approach than newer homes.
We don’t assume that every chimney needs major restoration. Where localised repairs will solve the problem, we’ll say so. Where the masonry or leadwork has deteriorated more seriously, we’ll explain why more extensive work may be needed.
Our focus is on reliable workmanship, clear communication and a tidy working area. We take care around existing tiles, slates, gutters and neighbouring roof sections, particularly on terraced properties where access can be limited.
Some chimneys need more than a basic repair. Where brickwork is badly weathered, mortar has failed across a large area or the stack has become unstable, chimney restoration may be the safest long-term option.
Restoration work can include dismantling and rebuilding sections of the stack, replacing damaged bricks, renewing lead flashing and reflaunching around the chimney pots. We aim to retain the character of the property wherever possible, especially on period homes where matching the existing brickwork and finish matters.
Areas
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Faq
Have questions about our roofing or building services? We've answered some of the most common queries to help you better understand our services, our process, and what you can expect when working with RJC Roofing & Building. If you can't find the information you're looking for, our friendly team is always happy to help.
Common signs include cracked mortar, gaps between bricks, loose debris on the roof or visible deterioration around the stack.
Yes. Failed or poorly fitted flashing is a common cause of leaks around chimneys, particularly after heavy rain or strong winds.
Yes. Even if a chimney is no longer in use, the external stack still needs to remain stable and weatherproof.
Yes. If only one section is damaged, a partial rebuild may be possible. We’ll assess whether the remaining structure is sound before recommending this.
Smaller repairs may be completed within a day, while repointing or restoration work can take longer. The timescale depends on access, weather and the extent of the damage.
Yes. We can secure or replace chimney pots and repair the mortar flaunching around their base.
Yes. We can assess the visible condition of the chimney and surrounding roof as part of a roof survey.
If you’re concerned about loose brickwork, damaged flashing or a leaking chimney, contact RJC Roofing & Building. We provide straightforward advice and professional chimney repairs across London, whether the issue needs a small localised repair or more detailed restoration work.

RJC Roofing & Building provides professional roofing and general building services across London. We work with homeowners, landlords and property managers who want clear advice, dependable workmanship and a job completed properly.
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