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New Zealand
Earthquake remediation
Mainmark offers the world’s most advanced technologies for earthquake remediation.
Our methods are tested and proven to strengthen the ground and provide excellent liquefaction mitigation.
We help ensure homes, buildings and other structures are brought back to level and given a strong, stable base. This also allows for cosmetic repairs to the damage that seismic activity has caused.
Mainmark has successfully resolved thousands of earthquake remediation projects internationally. We have a great deal of experience, most notably in New Zealand, Japan, and other earthquake-prone countries. Our ground improvement and liquefaction mitigation solution has been formally recognised as a geotechnical innovation after four years in development. This innovative solution has undergone extensive trials and testing in Christchurch Red Zone.
The internationally peer reviewed report for our resin injection ground improvement research trials has been released. The full report is now available for review on the New Zealand Geotechnical Society website
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Re-levelling In Action
This remarkable solution is the key to raising, re-leveling, and re-supporting properties affected by subsidence. Our skilled team of engineers and technicians will guide you through the process, demonstrating how we restore structural integrity and eliminate those troublesome wall cracks.
Trust Mainmark for excellence for re-levelling
Technologies & Solutions
Find out more about our earthquake remediation solutions & technologies
Residential Subsidence Repair
Before & After Treatment
Houses that need to be re-levelled often develop cracks in walls, sinking floors, sticking windows or jammed doors.
Our innovative solutions are designed to address sinking foundations and cracked walls, ensuring long-lasting stability for your home. Whether it’s a sinking foundation or a cracked wall repair, sinking concrete floor or re-levelling a driveway, we provide tailored services to every job.
We offer a range of underpinning options, including resin injection underpinning and concrete underpinning, to help raise and relevel sunken structures. The cost of underpinning varies depending on factors like the extent of damage and the type of foundation. Our expert team specialises in underpinning footings and crack wall repair, ensuring your home is safe and secure for the future.
*Results may vary depending on site conditions, ground behaviour and specific requirements of each project.
Trust The Experts
Mainmark Specialises in Re-levelling Homes
If you’re worried, call Mainmark to assess your house. We can improve the ground beneath your house or carry out re-levelling to prevent further damage.
Mainmark specialises in re-levelling buildings that have experienced structural issues. We developed the Teretek and JOG technologies, which are versatile and suitable for re-levelling both simple and complex structures.
JOG is a non-invasive method of injecting cementitious grout beneath your house. This results in a supported and improved foundation.
Teretek uses a method of injecting polyurethane resin beneath your house. As the resin expands, it gently lifts the structure. This is also a non-invasive and cost-effective solution.
Re-levelling the Christchurch Art Gallery
During the Christchurch earthquakes of 2010 and 2011, the Christchurch Art Gallery suffered significant damage to its foundations, causing the 33,000 tonne building to sink.
Mainmark worked closely with the project’s engineering team to successfully re-support and re-level the 6,500 square metre foundations in just 52 days, without requiring excavation or the occupants and exhibits to vacate.
Earthquake repair
Featured Projects
Why Choose Mainmark
The Leaders in Foundation Repair
50 Year Product Warranty
Backed by a 50-year warranty and ongoing support you can trust.
Benefits
Mainmark’s Level Correction Methods Are:
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.
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Earthquake Remediation and Liquefaction Repair FAQs for New Zealand Homeowners
What is earthquake remediation for a house?
Earthquake remediation is the process of assessing and repairing damage caused by seismic movement, ground settlement or loss of foundation support. For homes, this may involve ground improvement, foundation re-levelling, floor re-levelling or house re-levelling where shaking, liquefaction or weak ground has caused the building to move.
Can liquefaction cause foundation movement?
Yes. Liquefaction can cause the ground beneath a home to lose strength during an earthquake, reducing support under foundations, slabs or floors. This can lead to foundation movement, settlement, sinking floors, cracked walls, jammed doors, sticking windows or a house that is no longer level.
What are the signs of earthquake foundation damage?
Common signs include cracked walls after an earthquake, cracks around doors and windows, uneven or sloping floors, gaps around skirting boards, jammed doors, sticking windows, damaged concrete slabs and visible foundation cracks. If these issues appear after seismic activity, a professional assessment can help determine whether the damage is structural or ground-related.
Can a house be re-levelled after earthquake damage?
Yes. Depending on the condition of the home and the ground beneath it, earthquake house re-levelling may be possible. Mainmark can assess the extent of movement, identify whether weak ground or liquefaction has contributed, and recommend a suitable re-levelling, foundation support or ground stabilisation approach.
What is ground stabilisation after an earthquake?
Ground stabilisation involves improving weak, settled or earthquake-affected ground so it can better support the structure above. For homes, this may involve treating voids beneath foundations, improving ground strength or re-supporting areas affected by liquefaction, settlement or loss of bearing capacity.
Can earthquake foundation repair be done without major excavation?
In many cases, non-invasive repair may be suitable. Mainmark uses ground improvement and resin injection technologies that can help re-support weak ground, fill voids and assist with re-levelling through targeted injection points. This can reduce disruption compared with traditional excavation-based repairs, depending on site conditions.
Should I repair cracks before fixing earthquake-related foundation movement?
If cracks are caused by earthquake movement, liquefaction or foundation settlement, cosmetic repairs may not last until the underlying issue is addressed. It is usually better to assess the ground and foundation conditions first. Once the home has been stabilised or re-levelled, wall, floor or plaster repairs can be completed with more confidence.
How much does earthquake remediation cost in New Zealand?
The cost depends on the level of damage, how much the house has moved, ground conditions, liquefaction risk, access and the repair method required. Earthquake remediation may involve foundation repair, ground improvement or house re-levelling. A site assessment is the best way to receive accurate advice and a tailored quote.
Who provides earthquake foundation repair near me in New Zealand?
Mainmark provides earthquake remediation, liquefaction repair, ground stabilisation, foundation re-levelling and house re-levelling solutions for homeowners across New Zealand. If you are searching for help with foundation movement after an earthquake near you, Mainmark can inspect the issue and recommend a site-specific repair approach.
Why choose Mainmark for earthquake remediation and ground improvement?
Mainmark is a specialist ground engineering company with New Zealand experience in earthquake remediation, liquefaction-related ground improvement, foundation movement and house re-levelling. Homeowners choose Mainmark for practical site assessments, engineered repair methods, non-invasive technologies and solutions focused on treating the ground conditions behind the damage.
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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Mainmark Ground Engineering (NZ) Ltd
