Leadwork & Flashing Repairs
Leadwork & Flashing Repairs That Stop Leaks for Good
Chimneys, valleys and roof-to-wall joints are the most common places water gets in. Our leadwork is dressed and detailed to keep it out.
- Fully insured tradespeople
- 10-year workmanship guarantee
- Rapid emergency response
- Locally based in Welwyn
Signs you need this service
- Leaks that appear specifically around a chimney breast
- Cracked, lifted or missing flashing visible around chimneys or walls
- Water staining where a roof meets an extension or dormer
- Green or white residue (old, perished lead) around joints
- A leak that only appears where two roof sections meet in a valley
Our process
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1
Inspect existing leadwork
We check flashing at every chimney, valley and abutment for cracking, lifting or perishing.
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2
Strip and prepare
Failed lead or flashing is removed and the area prepared for a proper, dressed installation.
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3
Install new leadwork
New lead (or appropriate modern flashing material) is cut, dressed and secured correctly to the specific joint.
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4
Weatherproof seal
Joints are pointed and sealed so the repair performs in driving rain, not just light weather.
Why choose CS Roofing
- Specialist leadwork around chimneys, valleys and abutments
- We dress and detail lead properly rather than relying on sealant alone
- 10-year workmanship guarantee
- Often resolves leaks that other repairs have missed
Frequently asked questions
Why does flashing fail before the rest of the roof?
Lead flashing is a wear joint — it flexes with temperature changes and can crack or lift over time even when the surrounding tiles are fine, which is why it needs checking separately.
Can you repair flashing without disturbing the tiles around it?
In most cases yes, though we'll always check the adjoining tiles are sound while we have access.
Do you use lead or modern alternatives?
We use traditional lead in most cases as it remains the most durable option, but can advise on modern flashing alternatives where appropriate for the property.
Is a leaking chimney breast always a leadwork problem?
Often, yes — chimney leaks are frequently caused by failed flashing rather than the brickwork itself, though we also offer chimney repointing & capping where the masonry needs attention too.