Monmouth · Gwent
Chimney stack repairs in Monmouth
For terraced streets in Monmouth, stacks are often shared between neighbours. We plan scaffold access and the work so both sides know what is involved, and we can price the stack as a whole if you want to split the cost.
Guide price from£460per stack inc VAT
- Postcodes
- NP25
- Population
- about 10,000
- Area
- Gwent
- Pricing region
- Wales
Is Gwent prone to ground movement?
Monmouth (NP25) has around 10,000 residents and sits in Gwent. If you are just outside Monmouth, we also cover Chepstow (12 miles), Abergavenny (13 miles) and Pontypool (16 miles).
Clay soils are found in parts of Gwent. Historic coal workings are recorded beneath parts of Gwent, and a coal mining search is worth checking where movement is unexplained. What you mostly find across Gwent: valley terraces on steep hillsides, Victorian houses in Newport and Abergavenny, and post-war estates.
What happens when we carry out chimney stack repairs in Monmouth?
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.
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.
Scaffold to the stack
Safe access is set up with a working platform around the stack. On terraces we may need to agree access over a neighbour’s roof, and a council licence is arranged where the scaffold stands on the pavement.
Signs you may need chimney stack repairs
- Chimney pots that are loose, tilted or cracked at the base
- Bits of brick, mortar or render landing in the garden or gutter
- A stack visibly leaning when you look along the roof ridge
How much will chimney stack repairs cost in Monmouth?
Prices in Monmouth are worked out on Wales rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.
| 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 |
Which repair method suits a home in Monmouth?
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
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
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.
Chimney stack repairs in Monmouth: questions and answers
What is the price of chimney stack repairs in Monmouth?
Guide prices for chimney stack repairs in Monmouth 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 Monmouth?
We do. Monmouth and the surrounding area are covered, including nearby Chepstow and Abergavenny. A free initial assessment from your photos is the first step.
Does the ground around Monmouth cause cracking?
The valleys of Blaenau Gwent, Torfaen and Islwyn lie on the South Wales coalfield with extensive historic workings and spoil tips, while Newport and Monmouthshire have Mercia Mudstone, alluvium and Old Red Sandstone. Only an investigation can say why a particular building has moved.
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.
More repairs we carry out in Monmouth
Chimney stack repairs near Monmouth
If a stack in Monmouth has shed bricks or a pot, photograph it from a safe place and send it over so we can advise on next steps.