Traditional underpinning
Underpinning normally involves excavating beneath existing foundations and placing new concrete support. It can be appropriate, but it is disruptive and requires careful sequencing.
Resource guide
Resin Injection vs Underpinning
Underpinning is well known, but it is not the only way to stabilise a building. Resin injection is a modern alternative for suitable ground improvement and foundation strengthening projects.
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Resin injection
Resin injection places expanding resin through small drill holes. It can fill voids, improve ground support and stabilise foundations with a much lighter footprint.
Which is right?
The answer depends on soil, structure, damage pattern, access and engineering requirements. A survey is the sensible first step.
Free initial advice
Turn the guide into a repair plan
If the symptoms match your property, the next step is a practical assessment.
Keep reading
Related foundation repair guides
Useful resources linked to this topic.
What Is Subsidence?
Subsidence is downward movement of the ground that causes part of a building to lose support. It can create cracks, distortion, uneven floors and problems with doors or windows.
Read more
Signs of Subsidence
Subsidence does not always look dramatic at first. Small changes that repeat, widen or appear in clusters can be more important than one isolated hairline crack.
Read more
Foundation Repair Costs
Foundation repair pricing depends on the cause, the size of the treatment zone, access and the evidence required. A quick quote without understanding the property is rarely helpful.
Read moreFAQ
Resin Injection vs Underpinning FAQs
Straight answers before you book a survey.
Is resin injection permanent?
The resin sets in the treated ground and is designed as a durable stabilisation method. The root cause, such as leaking drains, must also be dealt with.
Does resin lift buildings?
In some cases controlled lift may be possible, but stabilisation is the main objective and any lift must be carefully assessed.
Can resin injection replace underpinning every time?
No. Some properties still need underpinning or another engineered solution. Suitability is assessed case by case.