Subsidence & Ground Stabilisation

Residential Sector:

Subsidence Ground Remediation By Resin Injection


Restek uses traditional testing methods and our unique deep depth Ground Penetrating Radar – GPR to create a value-engineered solution, bespoke for each project. Our ground stabilisation techniques are value engineered and involve driving small, specialist injection lances into mobile ground consisting of loose soil, gravels & voids. Compared to traditional underpinning Restek’s ground stabilisation by resin injection is less invasive, leaves little to no trace work has been carried out and has less environmental impact.

After reviewing the GPR data, we create and agree the remediation schedule with the client, we use a continual systematic injection and reaction technique to carefully monitor the stabilisation process. We inject a combination of different resin types, at varying depths and volumes through each lance. This multi-level, multi-resin injection procedure, ensures the correct resin is efficiently injected, at each level and at exactly the right amount through each lance.

Once injected, Restek resins undergo a chemical reaction, changing from a low-viscosity liquid to a solid. The process begins with foaming to four times the injection volume, which helps to significantly reduce the volume and weight of the injected product. It then compacts and stabilises the surrounding loose ground & voids in the subsoil.

We offer a value engineered solution, bespoke for each project


A value engineered solution is so important as every ground remediation project is unique and can present many different issues below ground. Restek combines traditional testing with the latest GPR technology to create clear, accurate and reliable data of issues in the subsoil. We undertake all aspects of ground remediation so we can offer value-engineered, full turnkey projects to our clients.

Restek identifies all issues above and below the subsoil using the data gathered through our deep depth GPR surveys. This ensures the correct method of remediation is always used and eliminates any guesswork. We assess the ground stabilisation process pre, during and finally to validate the work, post remediation.

Many of Restek’s competitors carry out simple isolated testing and then inject the same resin around the whole project, based on an isolated test. This method doesn’t give a clear picture of the real issues beneath the ground for the entire project and can cause instant additional problems with heave or recurring problems in the future, due to the wrong solution being advised.

Not knowing the full extent of the problem can result in:


• Re-visiting the site over and over, forcing you to take more days off work while additional work is carried out

• Wasting time & money trying different things that don’t solve the real issue

• Spending more money on remediation & identifying further problems in the future

• Additional time & money spent putting aesthetic damage right like blown render, pointing and door/window sealing

• Losing money on a future house sale by not having a transferrable warranty for work carried

• Greater environmental impact through more waste material, unnecessary remediation causing excessive damage to the ecosystem