Quick Enquiry Call Us


If you cant find what you’re after please don’t hesitate to contact us.

Select Region

Please select the global region website you'd like to view.


Quick Enquiry

Submit your enquiry using our online form and include a brief message about the type of issues you are experiencing. One of the Mainmark experts will contact you as soon as possible.

Privacy Policy(Required)
Receive Information
This field is for validation purposes and should be left unchanged.


Wall underpinning

Residential wall underpinning

If your home is suffering from subsidence, wall underpinning – or other methods to improve the existing foundations or the ground beneath the foundations and lift or re-level your home – may be necessary.

Traditional wall underpinning is a laborious and time-consuming process, but it’s not the only solution for dealing with subsidence in residential properties. Mainmark’s methods are swift, reliable and cost-effective, returning your home, and your family life, back to normal as quickly as possible.

Using surgical-like precision to drill under the foundations of your home, Mainmark’s Teretek® resin injection and JOG computer-controlled grouting technologies deal with the root causes of subsidence, providing:

  • Ground improvement – As a result of our treatments, the ground’s load-bearing capacity is increased, and liquefaction is mitigated.
  • Lifting and re-levelling – Our methods gently lift the property, returning your home to level.
  • Void filling – Resin or cement is injected into voids in the soil, filling them and improving foundation support

Our solutions give homeowners a fast and simple way to deal with subsidence, so you can rest assured that your home is safe and on stable ground.

Why does my home need wall underpinning?

Wall underpinning is a remediation method for dealing with subsidence. Subsidence occurs when the soil under a home’s foundations begins to shrink or sink, resulting in:

  • Cracked or leaning walls
  • Uneven floors 
  • Doors and windows that get stuck
  • Extensions separating from the main structure

Subsidence can be caused by a range of factors, from prolonged heat waves that dry out the soil, to flooding and soil erosion or historic mining activities. But when the signs of subsidence appear, it’s important to seek out professional help as soon as possible to avoid further damage to your home.

In the past, the only options for dealing with subsidence were complicated and disruptive. Mass concrete wall underpinning, for example, involves digging out the soil from under the foundation and then adding concrete to strengthen the existing foundations. The process could take several weeks and during that time, families would have had to find alternative accommodation.

Mainmark’s modern ground engineering methods are effective alternatives to wall underpinning, negating the need for all of that excavating, piling and concrete pouring. Our solutions can be completed in a matter of days and there’s no need to leave your home while work is being carried out. 


Alternative wall undeprinning technologies

Teretek® – resin injection – alternative to wall underpinning

Teretek® resin injection is an engineered solution used as a non-disruptive alternative to wall underpinning, using a plural component, expanding polyurethane resin. Teretek® works in a way similar to keyhole surgery. Small holes are drilled under the foundation in order for Mainmark’s proprietary, environmentally inert resin to be injected under the house foundation, improving the stability of the ground and re-levelling the home.

Teretek® resin injection technology

JOG computer-controlled grouting – alternative to wall underpinning

JOG computer-controlled grouting is a multi-point injection technique that is used as an effective alternative to wall underpinning. This technology typically uses cementitious grout to re-level structures, including residential homes. This means that cementitious grout is injected under the foundations of your home, using computers to accurately control the injection amounts in the various predetermined locations.

JOG computer-controlled grouting

Mainmark technology benefits

Benefits of Mainmark’s technologies as an effective wall underpinning alternative


Our technologies are installed quickly and can be walked on soon after.

Environmentally inert

We use safe materials that are non-toxic and do not leach into the environment or affect the treated area.


Our solutions are surgical in nature, causing minimal disruption to you and your family.


Compared to other solutions, our technologies cost significantly less and have fewer associated costs.


We’re happy to have helped

Soil stabilisation FAQ’s
What happens with unlevel driveways, floors and hardstand areas?

After the application of the Mainmark solution, unlevel surfaces will become aligned again as the ground underneath is strengthened and re-supported. Simple cosmetic repairs may be required.

Will there be a mess?

Very little, if any. We use Teretek® engineered Resin Injection technology, which is likened to “keyhole surgery”, or JOG Computer-Controlled Grouting, with no major excavation and minimal disruption or mess. The injection holes required are very small.

How long does it take?

Each project is different and depends on the required amount of lift, area for correction, building construction, and ground conditions. Most projects can be completed in a day or two, and we can work at night or on one area at a time, so your business can keep operating.

Do i need to send my workers home?

No, most projects don’t require you to vacate the premises or even move furniture or equipment. For the most part, you can keep operating as normal. Driveways can often be driven on in as little as 30 minutes after treatment.

What warranty will i get?

The materials we use have been developed for use underground and have been specifically engineered to resist shrinkage and deterioration. Teretek® is warranted by Mainmark for an industry-leading period of 50 years.

Is it safe and environmentally friendly?

Injected Teretek® and JOG materials are environmentally inert and have no detrimental effects on the environment.

Get a quote

Arrange a site assessment in three simple steps:

Step 1

Submit your enquiry using our online form. Include a brief message about the type of foundation issues you are experiencing.

Step 2

Our friendly customer service team will be in touch to schedule a site assessment that suits you.

Step 3

One of Mainmark’s experts will visit your home or property, assess the damage and determine the likely cause. They will establish the approach needed, create a plan specific to the needs of your building and provide you with a detailed quote.

Privacy Policy(Required)
Receive Information
This field is for validation purposes and should be left unchanged.

© 2024 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.

Mainmark Ground Engineering (UK) Ltd.

CRN: 09372443

Ground Improvement



Subsidence Repair

About Mainmark

Our team




Media & Press



Privacy Policy

Terms and Conditions

Created by Codex