0800 873 835
New Zealand
Re-level your concrete slabs
Helping to protect your biggest asset.
Mainmark has raised, re-levelled and re-supported homes and other residential buildings for more than 25 years, delivering successful solutions to thousands of properties.
Our ground improvement and level correction methods can address foundation subsidence and are effective for helping to fix cracks in walls or re-level sunken floors in homes of any size. Our solutions are also used for slab lifting foundation slabs and large driveways.
✓ 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 – Our technologies have fast curing times and treated areas can be used immediately or without the delays compared to traditional repair methods.
✓ All in one service – project manage all jobs from start to finish, no need to deal with external service location contractors
✓ Peace of mind – backed by an industry leading 50 year product warranty
How much does Foundation Repair Cost?
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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Hassle free
Unlike many level correction processes, our methods are very resident-friendly.
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We use non-invasive techniques likened to keyhole-surgery, so we don’t tear up floors and excavate ground (the injection holes can be as small as 6mm).
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We are very quick Our technologies have fast curing times and treated areas can be used immediately or without the delays compared to traditional repair methods.
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We provide peace of mind our resin injection method is backed by an industry leading 50 year product warranty.
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Teretek Resin Injection
This method injects expanding structural resins into very small holes that have been drilled into the concrete slab.
An irreversible reaction occurs as the injected material mixes, causing it to expand and set. The mixture fills any voids caused by unsettling, strengthening and compacting weak ground. Finally, the force generated by the expansion lifts the home where required. We utilise our proprietary engineered resin solution, Teretek®, perfected by Mainmark after many years experience in fixing foundation ground issues and our knowledge of the unique local conditions. It has been used extensively in Christchurch earthquake repairs. Likened to keyhole surgery, this is a non-invasive, cost and time effective solution to get you back to level.
JOG Computer-Controlled Grouting
JOG is a computer-controlled grouting re-leveling method that provides a very gentle lift, over large areas.
A number of small holes are drilled, with grout delivered at multiple injection sites. Layers of grout are built up progressively to lift and ‘float’ the structure at specific points, bringing it back to level. JOG uses a computer-controlled system, delivering a continuous and balanced lift. The JOG method is a non-invasive solution for correcting subsidence of buildings, floors and other structures – it’s a time efficient and cost effective method.
© 2025 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.
Mainmark Ground Engineering (NZ) Ltd
