Roofing service
Chimney Repairs in Carlisle and Cumbria
Chimney repairs cover repointing, rebuilding, flaunching, flashing renewal, pot and cowl work and, where a stack is redundant, removal below the roof line. Chimneys are the most exposed masonry on a building and are the single most common source of roof leaks.
Chimney Repairs in Carlisle and across Cumbria
A chimney stack is exposed on all four sides, above the roof, in the wettest and windiest part of the building. Its mortar takes more weather than any other masonry on the property, and the flashing where it meets the roof is one of the hardest details to get right.
When a leak appears near a chimney breast, the cause is usually one of five things: cracked flaunching, open mortar joints, failed or missing flashing, a cement fillet used instead of lead, or a redundant flue with no cap letting rain straight down the stack.
When to call us
- Damp patches on the chimney breast, upstairs or in the loft
- Cracked or missing flaunching around the pots
- Eroded, open or hollow mortar joints
- Leaning, bulging or visibly unstable stack
- Missing, lifted or cement-patched lead flashing
- Rain entering a disused flue
- Spalling brickwork from frost damage
- Loose or broken chimney pots
How we approach it
Stops the most common roof leak
Correcting chimney detailing resolves a large share of leaks that are wrongly blamed on the roof covering.
Proper lead, not mortar fillets
Step flashings, soakers and back gutters formed in lead last decades; a cement fillet cracks within a few winters.
Structural safety
A leaning or hollow-jointed stack above a street or garden is a genuine hazard, and is dealt with as such.
Options for redundant stacks
Where a flue is no longer used, capping with a ventilated cowl or removing the stack below the roof line are both offered with the pros and cons of each.
What happens, step by step
1. Inspect the stack
The stack is examined for movement, joint condition, flaunching, pots and flashing — by drone where the roof cannot be safely accessed.
2. Report and recommend
You are shown images of what has failed and given the realistic options: repair, rebuild, cap or remove.
3. Access
Scaffold with a working platform at stack level is normally required to work safely on a chimney.
4. Masonry work
Joints are raked out and repointed, or the stack is taken down and rebuilt in matching materials to a sound course.
5. Flaunching, pots and flashing
New flaunching is formed, pots reset or replaced, and lead flashings renewed and chased into the joint.
6. Check and hand over
The completed stack is photographed and the surrounding roof covering made good.
Properties we work on
- Victorian and Edwardian terraces with tall shared stacks
- Stone-built rural cottages and farmhouses
- Semi-detached and detached post-war housing
- Properties with open fires, stoves or redundant flues
- Listed buildings and conservation-area properties
Materials and systems we use
- Lime and cement mortars
- Mortar specified to suit the masonry — lime-based mixes on soft stone and older brick, where hard cement would damage the surrounding material.
- Code 4 and Code 5 lead
- Step flashings, soakers, aprons and back gutters formed in the correct code and clipped rather than sealed.
- Matching brick and stone
- Reclaimed or matched material used when rebuilding so the stack still belongs to the building.
- Chimney pots and cowls
- Replacement pots, terminals and ventilated caps for capping disused flues while keeping them ventilated.
Mistakes and shortcuts to avoid
Sealing a disused flue completely
Capping a flue without ventilation traps moisture inside the stack and causes damp on the chimney breast. Caps must be vented.
Cement fillets in place of flashing
Very common on older repairs, and a guaranteed future leak once the fillet cracks away from the masonry.
Hard cement pointing on soft stone
Strong mortar forces moisture to evaporate through the stone instead of the joint, causing the face of the stone to spall.
Repointing a stack that needs rebuilding
If joints are hollow through the depth of the wall or the stack is leaning, pointing the face achieves nothing.
Chimney Repairs: common questions
Where we carry out this work
We are based in Carlisle and cover the city, the wider county and across the border into South West Scotland.
Related services
- LeadworkLeadwork is the formed metal detailing that waterproofs the junctions of a roof — chimney flashings, valleys, soakers, box gutters, dormer cheeks and parapet linings. Correctly sized and fixed lead outlasts almost every other component on a roof.
- Roof RepairsA roof repair fixes a localised fault — slipped slates, cracked tiles, failed flashing, a leaking valley or a split flat-roof seam — without replacing the whole roof. Most Cumbrian domestic repairs are completed in a single visit once the true cause of the leak has been identified.
- Emergency Roof RepairsAn emergency roof repair makes a property safe and watertight quickly after storm damage, a sudden leak or falling slates. The first visit stops water entering and removes any danger to people below; the permanent repair follows once the roof is safe to work on.
- Drone Roof InspectionsA drone roof inspection surveys a roof using a camera-equipped UAV, producing high-resolution photographs and video of every slope, chimney, valley and gutter without scaffolding, ladders or anyone setting foot on the roof. It is faster, safer and cheaper than traditional access, and produces evidence you can keep.