Why chimneys need extra attention
Chimneys stand proud of the roofline, so they take the full force of wind, rain and temperature swings that the rest of the roof is partly sheltered from. The mortar joints between bricks, the flashing where the chimney meets the roof, and the pot or cowl on top are all points where weather can find a way in — and because a chimney is usually the tallest part of a roof, problems here often go unnoticed for longer.
Repointing
Mortar between the bricks of a chimney stack typically needs repointing every 20 to 30 years, sometimes sooner on exposed or older stacks common across Bristol's Victorian terraces. Crumbling or missing mortar isn't just cosmetic — it lets water into the stack itself, which can eventually affect structural stability as well as causing damp inside the property.
Flashing
The lead flashing that seals the join between a chimney and the surrounding roof is one of the most common sources of chimney-related leaks. It's a relatively small, contained repair when caught early, and a far more expensive one — a soaked ceiling or damaged timber — when it isn't.
Unused chimneys still need looking after
If a fireplace isn't in use, it's tempting to assume the chimney can be ignored. It can't — an unused chimney without a cowl or cap is an open route for rain and birds, and can develop damp problems that eventually show up as staining lower down the chimney breast inside the house. A simple cowl or capping is a cheap way to prevent this.
What we'd recommend
A visual chimney check as part of a general roof inspection is enough to catch most problems early. If you can see missing mortar, a leaning stack, or staining on an internal chimney breast, it's worth getting looked at properly. Our chimney and leadwork team handles everything from repointing to full rebuilds and lead flashing repairs.