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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.

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Sinking floors

What are sinking floors?

Sinking floors can be a sign of subsidence and issues with house foundations. When it comes to the main structural aspects of a property, it is essential they are looked at as soon as a problem arises – to avoid foundation collapses from weak voids.

A building can sink at various points or in the worst circumstances can affect the entire foundation.

With Mainmark’s range of effective solutions, we can work with you to make the whole process less stressful allowing you to live happily in your home again.

What does a sinking floor mean?

Concrete floors within a home can sometimes suffer subsidence, which is the sinking of the concrete due to movement of foundation ground.

A building can sink at various localised points or can be spread across the entire footprint of the house foundation, depending on where, and the size of the affected area.

Subsidence, if left untended can be a very serious problem, which is likely to worsen, creating further sinking floors, wall cracks or other significant building damage.

How can we help

What is the cause of sinking floors and how can Mainmark help ?

Sinking floors can often be a sign of subsidecne. Some homes are at a greater risk than others when it comes to subsidence. There are also many geological, man-made and seasonal impacts that can make your home more likely to experience a problem.

Mainmark’s ground improvement and concrete floor re-levelling methods for house subsidence are effective for fixing sinking floors in homes of any size.

The Mainmark team of experts will visit your home, assess the damage, and ascertain the cause. Our experienced engineers and technicians establish the underpinning approach needed, creating a plan specific to the needs of your home.

Our cutting-edge solutions are the modern answer to traditional concrete underpinning and are likened to keyhole surgery. Our non-invasive, clean and time-efficient floor fixing solutions are not just for concrete slab floors; we can raise and relevel strip footings, a range of slabs and we can re-level paths and driveways too.

This house lifting, and re-levelling eliminates the need and the cost of ripping out and replacing the floor or demolishing and rebuilding brickwork walls, restoring value to the home. The work is carried out with the minimum of disruption to the occupant. In many cases the occupant can remain in the home.

As opposed to more traditional methods of underpinning buildings, our resin injection methods are quicker and, in most cases, done from the outside using 16mm diameter tubes and if interior injection is required only a 6mm tube is used. The size of the tubes means that there is minimal intrusion into the property.


Fast, cost effective & non-invasive solutions to treat sinking floors


Mainmark technologies for remediation of sinking floors

Teretek® – Sinking floor remediation through resin injection

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 solution that utilises an injection delivery method developed to raise, re-level, and re-support buildings and other above-ground structure, including sinking floors.

Teretek® resin injection technology

Sinking floor remediation with JOG computer-controlled grouting

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 , consolidating weak ground and lifting foundations and sinking floors to deliver specific, engineered outcomes, regardless of complexity.

JOG Computer Controlled Grouting

Mainmark technology benefits

Benefits of Mainmark’s subsidence and sinking floors treatments


Our technologies for treatment of sinking floors have fast curing times and treated areas can be used immediately or without the delays compared to traditional repair methods.

Environmentally Inert

Our technologies for treatment of sinking floors use an inert material that is non-toxic and does not leach into the environment or affect the treated area.


Our sinking floor treatment solutions are of surgical nature compared to traditional methods.


Compared to traditional methods, our sinking floor solutions are more cost-effective, with minimal disruption to the area.


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

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© 2023 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.

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CRN: 09372443

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