Serving Kent, Medway & South East London

Chimney Repairs Specialists

Re-pointing, re-rendering, lead flashings, cowl installation, and structural repairs — keeping your chimney weathertight and sound.

Chimney Problems Are Roof Problems

Chimneys are one of the most exposed elements of any roof — they sit above the ridgeline, take the full force of wind-driven rain, and are subject to constant thermal cycling. They're one of the most common sources of water ingress we encounter.

Common Chimney Defects

Chimney issues almost always involve water ingress — either through failed lead flashings, crumbling mortar joints, or cracked render. Left unaddressed, these defects lead to internal damp, timber rot, and expensive roof repairs down the line. Read our guide on signs your roof needs replacing to understand when chimney problems indicate wider issues.

Chimney stack with crumbling flaunching needing repair

What We Typically Find

Failed PointingMortar joints eroded by frost and rain — water enters the masonry core
Cracked RenderSand/cement render crazing — traps moisture behind the surface
Lead FlashingFatigue cracking, lifting from chase, or sealed with silicone
FlaunchingCracked or missing — allows rain into the flue
Structural LeanSulphate attack or frost damage — may need partial rebuild

Our Chimney Repair Services

Full re-pointing with appropriate lime or cement mortar
Render removal and re-rendering
Lead flashing replacement to LSA standards
Flaunching renewal and chimney pot replacement
Partial or full chimney stack rebuild
Scaffold erection and management

A Note on Gas Flues

If your chimney serves a gas appliance, any work affecting the flue must be signed off by a Gas Safe registered engineer. We coordinate with Gas Safe professionals where needed.

Chimney flashing repair by Ikon Roofing
Chimney stack with crumbling flaunching and mortar damage

Chimney Repairs FAQs

Common questions about our chimney repair services.

Chimney repair costs depend on the extent of the work. Reflashing a chimney base typically costs £400–£800. Repointing a chimney stack ranges from £300–£600. A full chimney rebuild can cost £1,500–£3,000+. We provide detailed quotes after inspection.

Common signs include crumbling mortar joints, staining on internal walls near the chimney, loose or missing flaunching around pots, cracked render, and water ingress during heavy rain. Any of these warrant a professional inspection.

Yes. Failed or poorly installed chimney flashings are one of the most common causes of roof leaks. We install all chimney flashings in lead to LSA standards — never silicone or lead substitute.

All chimney repair work comes with our standard guarantee package: a 15-year workmanship guarantee, a 15-year manufacturer-backed materials warranty, and a 10-year insurance-backed guarantee (IBG).

Yes. If a chimney is no longer in use and is causing persistent problems, removal can be a cost-effective long-term solution. We remove the stack down to roof level, install a ventilated cap, and make good the roof covering.

Yes. We cover the full DA, BR, SE, ME, and TN postcode areas including Sidcup, Orpington, Bromley, Dartford, Medway, Rochester, Welling, Chislehurst, and surrounding towns.

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