Wales
Structural repairs in Gwent
Structural repairs across Gwent: subsidence, cracks, underpinning, wall ties, lintels and claim repairs. Gwent has a mix of ground, with clay in some places and firmer rock in others.
- Nation
- Wales
- Pricing region
- Wales
- Towns listed
- 11
- Mining legacy
- Coalfield
What is the ground like in Gwent?
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.
Historic coal workings are recorded beneath parts of Gwent, and a coal mining search is worth checking where movement is unexplained.
What usually causes cracking in Gwent?
Before pricing a repair in Gwent, we look at these likely causes first.
- Clay in parts of the area that dries out near trees in long dry spells
- Historic coal mining close to the surface
- Weathered lime mortar letting stone walls spread
- Solid stone walls bulging where the rubble core has loosened
- Garden and boundary walls leaning as tree roots and frost get to them
What kind of buildings are common here?
Valley terraces on steep hillsides, Victorian houses in Newport and Abergavenny, and post-war estates.
Which repairs do we carry out in Gwent?
- Bay window subsidence repairs
- Roof structure repairs
- Lintel replacement
- Resin injection ground stabilisation
- Floor joist repairs
- Gable end wall repairs
- Concrete repairs
- Crack stitching
- Retaining wall repairs
- Structural crack repairs
- Structural surveys and crack monitoring
- Subsidence insurance claim repairs
- Brick arch repairs
- Subsidence repairs
- Bowing wall repairs
- Chimney stack repairs
- Underpinning
- Wall tie replacement
- Boundary and garden wall repairs
- Mining subsidence repairs
- Extension pulling away repairs
Guide prices in Gwent
A selection of guide prices on Wales rates, including VAT. Each repair page has the full table.
| Item | Guide price | Per |
|---|---|---|
| Underpinning: mass-concrete underpinning | £920 – £1,400 | per metre of wall |
| Resin injection ground stabilisation: resin injection ground stabilisation | £735 – £1,400 | per metre of wall treated |
| Lintel replacement: standard window or door opening | £690 – £2,300 | per opening |
| Bowing wall repairs: lateral restraint for a typical gable | £920 – £2,750 | per wall |
Towns we cover in Gwent
We list 11 towns in Gwent, covering 12 postcode districts in the NP postcode area. The largest are Newport (about 160,000 people), Cwmbran (about 49,000 people) and Pontypool (about 36,000 people). Each town page has local postcodes, nearby places and the repairs we carry out there.
Do repairs in Gwent need approval?
Structural work in Wales, such as underpinning, needs building control approval. Party wall notices can apply where work affects a shared wall.
Questions about structural repairs in Gwent
Do you cover the whole of Gwent?
Yes. We take enquiries from across Gwent, including Newport, Cwmbran, Pontypool and Ebbw Vale. A free initial assessment from your photos is the first step.
Is Gwent affected by subsidence?
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. Whether a particular building has moved, and why, needs an investigation on site.
How much do structural repairs cost in Gwent?
It depends on the repair. On Wales rates, a standard window or door lintel from about £690 per opening and lateral restraint for a bowing gable from about £920 per wall, including VAT. Your written price follows photos or a survey.
What should I send for a free assessment in Gwent?
Photos of each crack inside and out with a coin or tape for scale, a wider shot showing where it is on the building, your postcode in Gwent, and when you first noticed it. If an insurer is involved, include the claim reference.