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Protect Your Biggest Asset From Subsidence


Residential solutions

Since 1989, Mainmark has raised, re-levelled and re-supported homes and other residential buildings, delivering successful solutions to thousands of properties.

At Mainmark, we specialise in ground improvement and level correction methods designed to address foundation subsidence in Kiwi homes. Whether you’re dealing with cracks in walls, sunken floors, or uneven driveways, our expertise can help. With a global reputation for excellence and a deep understanding of local challenges across Aotearoa, we are committed to providing innovative solutions tailored to your specific needs.

Our team of experts is dedicated to delivering results, utilising cutting-edge technology and proven techniques to ensure lasting solutions.

Contact us today to learn more about how we can help you achieve peace of mind. Book your FREE, no-obligation site inspection today!

Problems we solve
for our clients

Cracked Walls

Fast, cost-effective and non-invasive subsidence solution to fix cracked walls.

Sinking Floors or Slabs

Fast, clean and non-invasive lifting of sinking floors and concrete slabs.

Jammed Doors or Windows

Our solutions are more cost-effective, with minimal disruption to the area.

Foundation Repair

We offer the most advanced house re-levelling and underpinning technology in the market.

Earthquake Damage

The world’s most advanced earthquake remediation, liquefaction mitigation and ground strengthening technologies.

Underpinning Repair

Resin Injection – the modern alternative to traditional underpinning.

How we get your home back to level

Mainmark’s industry
leading technologies


Our Teretek® technology provides a solution to address subsided structures, improve ground, and fill voids.

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Our Terefil® technology provides an advanced lightweight cellular concrete for soil replacement, large void filling, and pipe abandonment.

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JOG Computer-Controlled Grouting

Our JOG technology is a state of the art, computer controlled, multipoint injection system.

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Permeation Grouting

Permeation grouting is the most widely used pressure grouting technique that stabilises soil prior to excavation or construction.

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Mainmark’s specialised
in-house solutions

Ground Improvement

Ground improvement modifies a soil’s properties, improving its load bearing capacity or resilience against liquefaction.


We re-level buildings that have experienced subsidence, settlement, or other structural issues leading to uneven floors and foundation cracks.

Void Filling

Comprehensive void filling solutions for diverse market sectors, using specialised chemical or cementitious grouts.

Slab Lifting

Our non-invasive and cost-effective solution is a safe way of re-levelling concrete slabs with soil settlement or subsidence problems.

Need help?

Need help with a project? Contact us today.

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

Mainmark Ground Engineering (NZ) Ltd





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