Resin injection ground stabilisation in Mid Glamorgan

Area: Mid Glamorgan
Pricing region: Wales
Ground: Clay in parts
Towns listed: 12

What should you know about the ground under Mid Glamorgan?

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.

Historic coal workings are recorded beneath parts of Mid Glamorgan, and a coal mining search is worth checking where movement is unexplained. Housing stock in Mid Glamorgan: Long stone and brick terraces on valley sides, Victorian houses in Bridgend and post-war estates.

What to expect when we carry out resin injection ground stabilisation

Is resin suitable?
Send photos and any reports you hold. We give a free initial assessment, and an independent engineer then checks soil type, depth to firm ground and the cause. We can arrange the engineer. Clay and tree problems need particular care.
Ground and drain checks
Trial pits or probes confirm the soil profile, and a CCTV drain survey checks for leaks and for pipes in the injection zone. Damaged drains are repaired first, so resin is not lost into them or used to treat a cause that is still active.
Design and written price
The injection depths, spacing and target lift are set out before work starts. We confirm a fixed price in writing for the treated length, the monitoring and the making good, and deal with building control where the work needs it.

Is it time for resin injection ground stabilisation? Common signs

Sinking that trial pits trace to loose or washed-out soil
Floor slab dropping or hollow-sounding near one external wall
A corner that has dropped but no longer moves with the seasons
Cracks over a section of wall built on loose fill

What should you budget for resin injection ground stabilisation in Mid Glamorgan?

The ranges below reflect typical Wales costs for resin injection ground stabilisation, including VAT. Scaffold, access and making good can push a job to the top of the range.

Guide prices inc VAT on Wales rates. Items marked est. are our estimates.
Item	Guide price	Per
Resin injection ground stabilisation	£735 – £1,400	per metre of wall treated
Typical domestic project	£4,600 – £13,800	per project
Level monitoring after treatmentest.	£320 – £830	per programme

Repair options we may recommend

Injection beneath strip footings

Holes are drilled at close spacing along the wall, and tubes are placed at one or more depths below the footing. Resin is injected in stages from the bottom up, building a stiffened zone of ground under the wall while levels are read continuously.

Best for: Settled walls on loose or washed-out soil at shallow depth

Slab void filling and lifting

Small holes are drilled through the floor, and resin is fed into the void between the slab and the fill. As it expands it fills the gap and can lift the slab by small, controlled amounts. Floor coverings are lifted locally and the holes filled afterwards.

Best for: Sunken concrete ground floors and garage slabs

Resin alongside other repairs

Injection often forms one part of a wider scheme: drains repaired first, resin under the affected section, then crack stitching and making good once readings settle. On a mixed site, one wall may suit resin while another needs conventional underpinning instead.

Best for: Localised settlement within a broader subsidence repair

Resin injection: expanding resin injected through tubes beneath the footing. Indicative drawing, not to scale.

Do you need approval for resin injection ground stabilisation 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.

Towns in Mid Glamorgan we cover for resin injection ground stabilisation

Your resin injection ground stabilisation questions

Is the ground in Mid Glamorgan prone to subsidence?

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. Historic coal workings are recorded beneath parts of Mid Glamorgan, and a coal mining search is worth checking where movement is unexplained. Only an investigation on site can say why a particular building has moved.

How much will resin injection ground stabilisation cost in Mid Glamorgan?

On Wales rates, resin injection ground stabilisation starts from about £735 per metre of wall treated, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.

Is resin injection better than underpinning?

It is better for some jobs and unsuitable for others. Resin is quicker and less disruptive where the problem is loose or washed-out soil close to the footing. Underpinning or mini-piles are usually the safer choice for deep soft ground or clay dried by trees that cannot be removed.

Is the resin harmful to the ground or drains?

Once cured, the resin is inert in the ground. The practical risk is resin travelling into a damaged drain or service duct, which is why a CCTV drain survey comes first and any defects are repaired before injection. Services near the treated zone are located and protected.

How do I know if my house is suitable?

An engineer decides, based on the soil type, the depth to firm ground and the cause of movement. Send us photos and any reports for a free initial assessment. We will say honestly if resin looks unlikely to suit and a different repair is worth considering.