Cheshire · England
Chimney stack repairs in Cheshire
Looking for chimney stack repairs in Cheshire? Send us photos for a free initial view. Clay soils are found in parts of Cheshire, so we look at the ground, drains and nearby trees before recommending anything.
Guide price from£480per stack inc VAT
- Area
- Cheshire
- Pricing region
- North West
- Ground
- Clay in parts
- Towns listed
- 13
What should you know about the ground under Cheshire?
Most of Cheshire is glacial till over Mercia Mudstone. Around Northwich and the Weaver valley, historic salt and brine extraction has caused subsidence in the past, and a separate brine subsidence compensation scheme exists for parts of the county.
Historic brine and salt working has caused ground movement in parts of Cheshire in the past. What you mostly find across Cheshire: brick terraces in Crewe, Northwich and Warrington, Victorian villas in Chester, and inter-war and post-war semis.
What to look for before calling about chimney stack repairs
- Cracked or missing flaunching around the top of the stack
- Bits of brick, mortar or render landing in the garden or gutter
- Chimney pots that are loose, tilted or cracked at the base
- Mortar washed out of joints, leaving bricks standing proud
Chimney stack repairs prices in Cheshire
The ranges below reflect typical North West costs for chimney stack repairs, including VAT. Scaffold, access and making good can push a job to the top of the range.
| Item | Guide price | Per |
|---|---|---|
| Repointing, flaunching and minor brick repairs | £480 – £1,900 | per stack |
| Partial or full stack rebuild | £2,900 – £9,600 | per stack |
| Stack restraint or strappingest. | £385 – £1,150 | per stack |
How we usually approach chimney stack repairs
Repointing and brick repairs
Eroded joints are raked out and repointed in a mortar suited to the brick, often a lime-based mix on older stacks. Spalled or cracked bricks are cut out and replaced with matched reclaimed or new bricks. On many stacks this, with new flaunching, is all that is needed.
Best for: Upright stacks with weathered joints and some damaged bricks
Flaunching and pot resetting
Old cracked flaunching is broken out, pots are lifted and reset or replaced, and new flaunching is formed to a fall so water runs off. Unused flues can be capped with ventilated caps, which keeps rain out while letting the flue breathe.
Best for: Loose pots and cracked mortar at the top of the stack
Partial or full rebuild
Where the lean is pronounced or the brickwork is badly decayed, the stack is taken down to sound masonry, often to roof level, and rebuilt plumb with new flashings and flaunching. Original bricks are cleaned and reused where possible to keep the appearance.
Best for: Badly leaning or decayed stacks
What happens during chimney stack repairs, step by step?
Look from the ground
Photos from the street and garden, ideally with a zoom, show us the lean, the pots, the flaunching and the state of the pointing. Damp patches inside are worth photographing too, as they help trace the route water is taking.
Repair, restrain or rebuild
The agreed work is carried out: repointing, new flaunching and pots, restraint, or taking the stack down and rebuilding it. Lead flashings where the stack meets the roof are checked and renewed if needed.
Weatherproof and clear
Caps or cowls are fitted where agreed, the roof around the stack is checked for slipped tiles, and debris is cleared from gutters. You receive photos of the finished stack taken from the scaffold, since it is hard to see from the ground.
Do you need approval for chimney stack repairs in England?
In England, underpinning and other work that alters or strengthens a wall or foundation is building work under the Building Regulations (Part A, structure), so building control approves and inspects it. Like-for-like repairs often are not, and we tell you which applies before a price is agreed. Work to a party wall, or excavation close to a neighbour’s foundations, can also need a notice under the Party Wall etc. Act 1996.
Chimney stack repairs near you in Cheshire
- Warrington
- Chester
- Crewe
- Ellesmere Port
- Widnes
- Macclesfield
- Northwich
- Winsford
- Congleton
- Wilmslow
- Sandbach
- Nantwich
- Neston
Questions about chimney stack repairs in Cheshire
Does the ground around Warrington cause cracking?
Most of Cheshire is glacial till over Mercia Mudstone. Around Northwich and the Weaver valley, historic salt and brine extraction has caused subsidence in the past, and a separate brine subsidence compensation scheme exists for parts of the county. Historic brine and salt working has caused ground movement in parts of Cheshire in the past. Only an investigation on site can say why a particular building has moved.
How much will chimney stack repairs cost in Cheshire?
On North West rates, chimney stack repairs starts from about £480 per stack, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.
What if a chimney breast below has been removed?
Where the breast has gone but the stack is still on the roof, how that stack is now held up is a structural question. Cracking in nearby ceilings or a dropped stack are warning signs. An independent chartered structural engineer should assess it before any repair, and we can arrange one.
What is chimney flaunching?
Flaunching is the sloped bed of mortar on top of a chimney stack that holds the pots in place and throws rainwater off. When it cracks, water gets into the stack and pots can work loose. Renewing it is one of the most common stack repairs.
Why is my chimney stack leaning?
Most leaning stacks are caused by sulphate attack, where chemicals from old flue gases make the mortar expand more on the wetter side, so the stack bends away from the weather. Frost damage and failed pointing can make it worse. A recently leaning stack can also signal problems below.