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.

Subsidence survey

Should I book a subsidence survey?

If you have noticed any signs of subsidence around your home, or if you’re worried that your home is suffering from subsidence, it’s time to book a subsidence survey.

Subsidence surveys are normally carried out by chartered surveyors, who will look for signs of subsidence and check your house for any other issues. Structural engineers may also provide subsidence surveys and report on their findings.

Early detection and professional assessment are essential for diagnosing subsidence, and a survey will help you understand:

  • The cause of the problem
  • The extent of the problem
  • How to preserve the structural integrity of your home
  • How to minimise subsidence treatment and repair costs


Once the subsidence survey is complete, you will receive a report that outlines all the findings and we can advise on how to proceed with treating the underlying cause of the subsidence.

Our Teretek® resin injection and JOG computer-controlled grouting technologies use environmentally inert resin or cementitious grout to fill in the voids under the foundations of your home and improve the ground. They are injected through small holes (about 16mm in diameter) for a quick and efficient solution that causes minimal disruption and gives you peace of mind that your home is safe and stable

Subsidence survey – the process

What happens during a subsidence survey?

During the survey, an inspector will:

● Visually inspect your home, looking for signs of subsidence, such as cracks, sticking windows and doors and uneven floors.
● Test soil conditions to understand how the soil may be contributing to subsidence.
● Take measurements to determine if there has been any settlement or movement of the ground.
● Review historic data and records to understand your home’s history and any previous subsidence issues.

The subsidence inspection will ensure a comprehensive analysis of the issue affecting your home, taking into account the size and the layout of the property, as well as the extent of the subsidence. Other surveys may also be required, such as geographical surveys and drain surveys, as they can provide valuable information about the potential causes of subsidence. In some cases, a return visit after a monitoring period may be necessary to determine whether the building has moved.


Fast, cost effective & non-invasive solutions to treat subsidence following a subsidence survey.

How can Mainmark help

Mainmark full level surveys

The purpose of the level survey is to understand the nature and extent of the movement and confirm the required treatment.

Once a subsidence survey has been completed and the extent of the problem is understood, Mainmark can provide a full level survey. This will give you a better understanding of the nature and extent of the ground movement and the amount of work required to return your home to a safe, stable and level position.

During the full level survey, our specialist will determine how much lifting and level correction may be required and estimate how much resin or grout will need to be injected under the house.

The full level survey also gives our team an opportunity to:

  • Assess the area
  • Take measurements of the walls and floor slab
  • Note the position of services such as pipework and electrical cables
  • Consider any enabling works that may be required, such as the removal of furniture or the taking up of floor coverings
  • Identify any potential challenges such as the location of drains or under-floor heating

Following the full level subsidence survey, we’ll be able to suggest the best method for dealing with your home’s subsidence and offer an accurate quote for our services.


Mainmark technologies for treatment of subsidence following a subsidence survey

Teretek® resin injection treatment following a subsidence survey

With over 25-years’ experience, Mainmark has led the world offering some of the most advanced resin injection and grout solutions. Teretek® from Mainmark is a new proprietary solution that utilises an injection delivery method developed to raise, re-level, and re-support buildings and other above-ground structures.

Teretek® resin injection technology

JOG computer-controlled grouting following a subsidence survey

JOG computer-controlled grouting is an award-winning grouting technology for strengthening weak ground beneath larger homes and structures such as residential buildings, using a cement grout injected under computer control. It is an extremely precise method for stabilising soils, consolidating weak ground and lifting foundations to deliver specific, engineered outcomes, regardless of complexity.

JOG computer controlled grouting

Mainmark technology benefits

Benefits of Mainmark’s subsidence treatments following subsidence survey


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 or your family.


Compared to other solutions, our technologies cost significantly less.


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