Resin Injection
Resin injection is a modern, minimally invasive technique for stabilising ground conditions and re-levelling structures. A specially formulated geopolymer resin is injected through small holes drilled into the ground, where it expands to fill voids, compact loose soils, and lift sunken structures back to level.
Key Benefits
Non-invasive — no excavation required
Completed in as little as one day
Suitable for occupied buildings
Environmentally friendly materials
Real-time monitoring during injection
Immediate load-bearing capability
Is Resin Injection Right for You?
Ideal for
Subsidence caused by shrinkable clay soils
Ground stabilisation without excavation or disruption
Occupied residential and commercial buildings
Re-levelling slightly sunken structures
Filling small to medium voids beneath foundations
Not suitable for
Very large underground voids or mine workings (void filling may be better)
Properties requiring significant depth of underpinning
Structural issues caused by defective building design
How It Works
Survey
Ground penetrating radar and level surveys to map subsurface conditions.
Preparation
Small injection points are drilled — typically 16mm diameter.
Injection
Resin is injected and expands to fill voids and compact soils under real-time monitoring.
Verification
Post-treatment survey confirms ground stabilisation and level correction.
Resin Injection Across Hertfordshire
Click a location for local details.
Frequently Asked Questions
Is resin injection a permanent fix?
Yes. The cured geopolymer resin is chemically inert, does not degrade, and maintains its structural properties indefinitely. It's a permanent ground stabilisation solution.
How long does resin injection take?
Most residential jobs are completed in a single day — typically 4–6 hours on site. You can continue using the property immediately after treatment.
Can resin injection lift my house back to level?
Yes, in many cases. The expanding resin can raise sunken structures by several millimetres under real-time laser monitoring, though the primary goal is stabilisation rather than significant lifting.
Is resin injection cheaper than underpinning?
Yes, typically 50–70% less expensive than traditional underpinning. It also avoids excavation costs, skip hire, and extended labour — making it the more cost-effective option where ground conditions suit it.
Will resin injection work on clay soil?
Yes. Clay soils are one of the most common applications. The resin compacts and stabilises the clay, reducing its sensitivity to moisture changes that cause shrink-swell movement.
Does resin injection require excavation?
No. Injection is carried out through small 16mm-diameter holes drilled from the surface. There is no excavation, no spoil, and no heavy machinery required.
Free Resin Injection Survey
No obligation quote