Chimney Repointing & Capping
Chimney Repointing & Capping That Protects the Whole Roof
A crumbling chimney stack isn't just a cosmetic issue — failing mortar lets water track down into the roof space. We repoint properly and cap redundant chimneys correctly.
- Fully insured tradespeople
- 10-year workmanship guarantee
- Rapid emergency response
- Locally based in Welwyn
Signs you need this service
- Crumbling, cracked or missing mortar between chimney bricks
- Loose bricks or visible movement in the chimney stack
- Damp patches on a chimney breast wall inside the house
- An unused chimney that has never been capped, letting in rain and birds
- Efflorescence (white powdery staining) on chimney brickwork
Our process
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1
Inspect the stack
We assess mortar condition, brick stability and whether the chimney is in use, to recommend the right repair.
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2
Rake out and repoint
Failing mortar is raked out to sufficient depth and repointed to match the existing brickwork.
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3
Cap if redundant
For chimneys no longer in use, we fit an appropriate cap or cowl to keep out rain, birds and nesting material while maintaining necessary ventilation.
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4
Final check
We confirm the stack is structurally sound and weathertight before finishing.
Why choose CS Roofing
- Repointing matched to existing mortar colour and profile
- Correct capping that still allows necessary ventilation
- 10-year workmanship guarantee
- We check structural stability, not just cosmetic mortar
Frequently asked questions
How do I know if my chimney needs repointing?
Crumbling or missing mortar you can see from ground level, or damp patches on a chimney breast wall inside, are the most common signs. We're happy to assess it as part of a roof survey.
Should I cap a chimney I no longer use?
Generally yes — an uncapped, unused chimney is an open route for rain and birds. We fit caps that keep the elements out while still allowing the flue to breathe.
Can repointing fix a chimney leak?
It depends on the cause — if the leak is from cracked mortar, yes. If it's from failed flashing where the chimney meets the roof, you may also need our leadwork & flashing repairs service. We check both.
Is chimney work covered by your workmanship guarantee?
Yes, repointing and capping work carries the same 10-year workmanship guarantee as our other roofing services.