Clydach · West Glamorgan
Subsidence repairs in Clydach
Tapered cracks around the windows or doors of a Clydach home are worth taking seriously without assuming the worst. In most cases the cause can be found and removed, and the house then needs crack stitching and making good rather than new foundations.
Guide price from£2,300per property inc VAT

- Postcodes
- SA6, SA7
- Population
- about 19,000
- Area
- West Glamorgan
- Pricing region
- Wales
How do local ground conditions affect subsidence repairs in Clydach?
Clydach (SA6, SA7) has around 19,000 residents and sits in West Glamorgan. We also take enquiries from nearby Neath (4 miles), Swansea (5 miles) and Gorseinon (6 miles).
Parts of West Glamorgan have clay that can shrink near trees in dry spells. Historic coal workings are recorded beneath parts of West Glamorgan, and a coal mining search is worth checking where movement is unexplained. What you mostly find across West Glamorgan: hillside terraces, Victorian villas in Swansea and post-war estates.
Symptoms that point to subsidence repairs
- Doors and windows that start to stick or no longer close
- Cracks that open in summer and partly close again in winter
- Wallpaper rippling or tearing where the wall meets the ceiling
Guide prices for subsidence repairs in Clydach
These are guide prices for Clydach, using Wales rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Structural engineer's investigation and report | £460 – £1,850 | per property |
| CCTV drain survey (common first check) | £140 – £320 | per survey |
| Typical repair once the cause is dealt with: crack stitching and making goodest. | £2,300 – £11,000 | per property |
| Foundation strengthening where it is needed (see underpinning) | £920 – £3,200 | per metre of wall |
Methods for subsidence repairs
Crack stitching and making good
Once movement has stopped, cracked brickwork is cut along the bed joints, stainless helical bars are bonded in to tie the wall together, and the joints are repointed to match. Inside, plaster is renewed along the crack line before redecoration.
Best for: Category 1 to 3 cracking in walls that are otherwise sound
Remove the cause, then repair
Most subsidence is dealt with this way. The drain is repaired or the vegetation managed, the house is watched to confirm it has stabilised, and then the cracks are stitched, repointed and made good inside. It is the least disruptive route and usually the cheapest.
Best for: Clay movement or drain leaks where the cause can be removed
From first photo to finished repair
Send photos or call
Send photos of the cracks with a coin or tape for scale, and say when you first noticed them. We give a free initial assessment and suggest whether an engineer, a drain survey or your insurer comes first.
Find the cause
An independent chartered structural engineer inspects the house and, where needed, arranges a drain survey, trial pits or soil tests. We can arrange the engineer. The aim is to know what is moving, and why, before money goes on repairs.
Deal with the cause
Drains are repaired, vegetation is managed on the engineer’s advice, or a foundation scheme is designed if nothing else will work. Where monitoring is recommended, readings run for several months to show the movement has stopped.
Rules for subsidence 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 subsidence repairs in Clydach?
Guide prices for subsidence repairs in Clydach start from about £2,300 per property, 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 subsidence repairs in Clydach?
Yes. We take enquiries from across Clydach, including SA6, SA7, and from nearby places such as Neath and Swansea. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Clydach cause cracking?
Swansea and Neath Port Talbot lie on the South Wales coalfield, with historic workings, tips and steep valley sides, and softer estuarine ground around the docks. Only an investigation can say why a particular building has moved.
How do I know if cracks are subsidence?
Subsidence cracks are usually tapered, run diagonally from door and window corners, and show on both faces of the wall. Fine vertical cracks in new plaster are more often shrinkage. An engineer’s inspection, sometimes with monitoring, is the reliable way to tell.
Should I cut down the tree near my house?
Not without advice, because felling a mature tree on clay can make things worse. As the roots stop drawing water, the clay swells and can lift the foundations, which is called heave. Pruning or staged removal may be advised instead. Check whether the tree is protected.
More repairs we carry out in Clydach
- Mining subsidence repairs
- Lintel replacement
- Structural crack repairs
- Resin injection ground stabilisation
- Extension pulling away repairs
Subsidence repairs near Clydach
Send photos of the cracks in your Clydach home, with something for scale, and we will give a free initial assessment and tell you the sensible next step.