Global leaders in foundation repair & ground strengthening for commercial & residential applications
Subsidence repair specialist
Mainmark is a subsidence repair specialist offering solutions that can raise, re-level and re-support your home in as little as a day with minimal disruption for you and your family.
Our technologies include Teretek® resin injection and JOG computer-controlled grouting. Both use surgical precision to drill below the foundations of your home and inject inert materials that effectively deal with the root causes of subsidence.
With over 30 years of experience treating subsidence, we work closely with structural engineers to ensure your home is lifted gently without damaging the building or landscaping.
Our solutions are covered by a 20-year guarantee, providing peace of mind for your home’s long-term safety and stability. Get in touch to find out more about our residential subsidence treatments.
Why choose specialist subsidence repair solutions by Mainmark:
- Save thousands of pounds compared to traditional underpinning
- Quick and effective solutions
- Minimal disruption for you and your family
- Non-invasive – won’t damage landscaping
- Dealing with the underlying cause of subsidence
- 20-year industry backed guarantee
Mainmark can raise, re-level and re-support your home in as little as a day.
Mainmark uses a 2 in 1 non-invasive underpinning solution which not only strengthens the ground under the foundation but lifts the structure back to level. As the building moves back to its original position wall cracks generally close, leaving only cosmetic crack repair, such as patching and painting, to deal with. Structural damage is resolved, and the aesthetics of the building is re-newed.
- Cost effective – compared to traditional underpinning
- Non-invasive and clean – no major excavations with minimal disruption to residents
- State-of-the-art engineered solution – modern alternative to traditional underpinning
- Time Efficient – on average your home can be re-levelled in as little as a day
- Worry-free – backed by an industry leading 20 year product warranty
Process of underpinning a house using resin injection
Step 1: Our technicians drill small holes around the problem area
Strategically-placed injection holes are barely visible, with work typically carried out like key-hole surgery from the outside of the house through 16mm diameter tubes, reducing to as little as 6mm in diameter if applied from inside the home.
Step 2: Polyurethane resin is injected and lift is monitored
Teretek expanding polyurethane resin mix is injected through very small tubes into the ground of the affected area. Our technicians closely monitor the lift with real time laser level monitoring.
Step 3: Unique two-in-one solution improves ground strength capacity and fills voids
When Teretek is injected into the ground it’s components mix together and expand by chemical reaction, which strengthens the ground, re-levels the building and fills voids quickly and with minimal disruption.
Step 4: Building is brought back to level, wall cracks close-up and floors are lifted
Benefits of Teretek:
✓ Ground beneath building is strengthened
✓ Soil is compacted
✓ Voids in the ground are addressed
✓ Your home becomes structurally sound, helping secure its future
Technologies
Mainmark technologies are an alternative to using traditional underpinning contractors
Teretek® – resin injection as an alternative to resin injection as an alternative to traditional underpinning
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 structure
JOG computer-controlled grouting – an alternative to traditional underpinning
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.
Mainmark technology benefits
Benefits of Mainmark’s subsidence and cracked wall treatments
Fast
Our technologies have fast curing times and treated areas can be used immediately or without the delays compared to traditional repair methods.
Environmentally Inert
Our technologies use an inert material that is non-toxic and does not leach into the environment or affect the treated area.
Non-Invasive
Our solutions are of surgical nature compared to traditional methods.
Cost-Effective
Compared to traditional methods, our solutions are more cost-effective, with minimal disruption to the area.
Case Studies
Featured Case Studies
© 2025 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
