Rhondda · Mid Glamorgan
Chimney stack repairs in Rhondda
On older houses around Rhondda, many stacks lean slightly away from the prevailing weather. That is usually sulphate attack in the mortar, and the repair depends on how far the stack has moved and how sound the brickwork still is.
Guide price from£460per stack inc VAT
- Postcodes
- CF40, CF41, CF43
- Population
- about 70,000
- Area
- Mid Glamorgan
- Pricing region
- Wales
Why does the ground in Mid Glamorgan matter for chimney stack repairs?
Rhondda, Mid Glamorgan: about 70,000 residents across postcode districts CF40, CF41, CF43. We also take enquiries from nearby Tonypandy (3 miles), Mountain Ash (3 miles) and Aberdare (4 miles).
Clay soils are found in parts of Mid Glamorgan. Historic coal workings are recorded beneath parts of Mid Glamorgan, and a coal mining search is worth checking where movement is unexplained. Typical buildings in Mid Glamorgan: Long stone and brick terraces on valley sides, Victorian houses in Bridgend and post-war estates.
From first photo to finished repair
Check what is below
We ask whether any chimney breasts have been removed, and check the loft and rooms below for cracking. If a breast has gone without proper support, we recommend an independent chartered structural engineer before any stack work.
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.
Symptoms that point to chimney stack repairs
- Mortar washed out of joints, leaving bricks standing proud
- A stack visibly leaning when you look along the roof ridge
- Cracked or missing flaunching around the top of the stack
Guide prices for chimney stack repairs in Rhondda
The ranges below reflect typical Wales 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 | £460 – £1,850 | per stack |
| Partial or full stack rebuild | £2,750 – £9,200 | per stack |
| Stack restraint or strappingest. | £370 – £1,100 | per stack |
Methods for chimney stack repairs
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
Stack restraint or strapping
A stack that has leaned slightly but is otherwise sound can be restrained with stainless straps or ties fixed back to the roof structure or the gable. This stops further movement without taking the stack down, and is often combined with repointing.
Best for: Slightly leaning stacks with sound brickwork
Rules for chimney stack repairs in Wales
In Wales, the Welsh version of the Building Regulations applies. Underpinning and other work that alters or strengthens the structure needs building control approval and inspection; like-for-like repairs often do not. The Party Wall etc. Act 1996 applies to work on party walls and excavation close to a neighbour’s foundations.
Frequently asked questions
What is the price of chimney stack repairs in Rhondda?
Guide prices for chimney stack repairs in Rhondda start from about £460 per stack, including VAT, on Wales rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you carry out chimney stack repairs in Rhondda?
Yes. We take enquiries from across Rhondda, including CF40, CF41, CF43, and from nearby places such as Tonypandy and Mountain Ash. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Rhondda cause cracking?
Mid Glamorgan lies on the South Wales coalfield, with dense historic workings, spoil tips and steep valley sides. Landslip, retaining walls and mining legacy are all live issues in the valleys. Only an investigation can say why a particular building has moved.
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.
Is a leaning chimney dangerous?
A leaning chimney can become dangerous, because stacks are heavy and stand high above the roof. A slight, long-standing lean may be stable for now, but a lean that is worsening, or loose bricks and pots, should be looked at quickly. Keep people away from below if anything looks loose.
More repairs we carry out in Rhondda
Chimney stack repairs near Rhondda
Sharing a stack with next door in Rhondda? We can quote for the whole stack so you and your neighbour can see the full picture.