Roof Leaking Around a Chimney
Chimneys are one of the most common sources of roof leaks in London's period homes.
Possible causes
- Failed or slipped lead flashing
- Cracked mortar fillets in place of lead
- Porous or damaged brickwork
- Cracked chimney crown or missing cowls
Warning signs
- Damp on the chimney breast inside
- Staining around the chimney in the loft
- Water entering after driving rain
How it's usually fixed
- Renewing lead flashing and soakers
- Repointing or rebuilding the stack
- Replacing the crown or flaunching
- Fitting cowls or caps to disused flues
When to call a roofer
Book an inspection — chimney leaks can also indicate stack damage that needs attention for safety.
This page describes possible causes only. We can't diagnose your roof without inspecting it.