# Mainmark > Leaders in Advanced Ground Engineering --- ## Pages - [Doors sticking after heavy rain NZ](https://mainmark.co.nz/doors-sticking-after-heavy-rain-nz/) - [cracks-in-walls-and-sloping-floors-nz](https://mainmark.co.nz/cracks-in-walls-and-sloping-floors-nz/) - [Foundation Repair Cost Auckland](https://mainmark.co.nz/foundation-repair-cost-auckland/) - [Cost to Re-Level a House Christchurch](https://mainmark.co.nz/cost-to-relevel-house-christchurch/) - [Re-Level a House NZ](https://mainmark.co.nz/re-level-a-house-nz/) - [Wall Cracks & Foundation Movement NZ](https://mainmark.co.nz/wall-cracks-foundation-movement-nz/) - [Cracked Walls Southland](https://mainmark.co.nz/cracked-walls-southland/): Learn when wall cracks in Gisborne indicate structural problems, their causes, and effective solutions like Mainmark's Teretek® resin injection - [Australia Page](https://mainmark.co.nz/australia/): Founded In 1989 by Philip Mack following the earthquake that affected Newcastle, Mainmark quickly established itself as a local industry leader in tailored earthquake repair and remediation solutions. - [Pipe Abandonment & Decommissioning](https://mainmark.co.nz/pipe-abandonment-decommissioning-solutions-mainmark/): Mainmark's innovative Terefil® solution for pipe abandonment & decommissioning. Fill abandoned pipelines quickly, safely, & cost-effectively. - [Concrete Rising and Levelling](https://mainmark.co.nz/mainmark-residential-solutions-foundation-repair-for-homes/concrete-rising-and-levelling/): We inject engineered resin to improve your founding soil when you need to re-level your concrete slabs. - [Terefil Raft for Liquefiable Sites](https://mainmark.co.nz/soil-replacement/gravel-raft-liquefaction/): Terefil is used to create a lightweight cellular concrete raft prior to building construction. Save on excavation time and disposal costs - [Enquiry Form](https://mainmark.co.nz/enquiry-form/): Submit your enquiry using our online form. Include a brief message about the type of foundation issues you are experiencing. - [Manufacturing](https://mainmark.co.nz/industries/manufacturing/): Our teams are experts in helping factory and warehouse owners faced with unlevel buildings and weak ground. - [Soil Replacement](https://mainmark.co.nz/soil-replacement/): Terefil is a Mainmark technology to create a lightweight foamed or cellular concrete. Foamed concrete has found extensive use in construction and civil engineering applications due to being lightweight while still retaining good compressive strength. Terefil is effective for improving ground conditions in areas with soft, compressible soils. - [Liquefaction Mitigation](https://mainmark.co.nz/seismic-strengthening/liquefaction-mitigation/): Teretek resin injection is a ground improvement technology that can be used to mitigate liquefaction with minimal disruptions. - [Terefil Raft](https://mainmark.co.nz/technologies/terefil-raft/): Our team is dedicated to reshaping the future of construction with a new application for our Terefil Cellular Concrete technology - lightweight building rafts. - [Seismic Strengthening](https://mainmark.co.nz/seismic-strengthening/): We have been providing turnkey solutions to secure buildings against future seismic events for over three decades across Australasia and Japan - [Measuring cracks around your home](https://mainmark.co.nz/house-subsidence/measuring-cracks-around-your-home/): Mainmark offers professional solutions for cracked walls, providing quick and cost-effective re-levelling services for house foundations. Get in touch to understand your options and find a long term solution to your structural problems. - [Teretek Resin Injection](https://mainmark.co.nz/technologies/teretek-resin-injection/): Teretek® resin injection is used for ground improvement beneath existing structures. There are two primary applications for the technology, bearing capacity increase and liquefaction mitigation. - [Who we are](https://mainmark.co.nz/who-we-are/): Learn about Mainmark, a leading provider of ground engineering solutions, committed to innovation and sustainability since 1989. - [Commercial Brochures](https://mainmark.co.nz/resources/commercial-brochures/): Explore our collection of commercial brochures focusing on ground improvement. Download resources like "Resin Injection Ground Improvement Research Trials – Avondale and Bexley Red Zone Christchurch," "Use of expanding polyurethane resin to remediate expansive soil foundations," "Structure and properties of expanding polyurethane foam in the context of foundation remediation in expansive soil," and "Resin injection as a ground improvement method." Gain valuable insights for your projects. - [Residential Brochures](https://mainmark.co.nz/resources/residential-brochures/): Explore our residential brochures & ground improvement whitepapers. Download our resources for valuable insights into our solutions. - [Media & Press Releases](https://mainmark.co.nz/resources/media-press-releases/): Explore Mainmark's media press releases, covering company milestones, project successes, and industry advancements in ground engineering. - [Slab Jacking and Concrete Slabjack](https://mainmark.co.nz/slab-jacking-and-concrete-slabjack/): Our level correction methods can cater to any building size, from homes and driveways to warehouses and transport yards, and are non-invasive, cost-effective, time-efficient, with minimal disruption to the occupants. - [Terefil®](https://mainmark.co.nz/technologies/terefil/): Explore Mainmark's Terefil® lightweight foamed concrete for void-filling, pipe abandonment, and soil replacement. - [Void Filling](https://mainmark.co.nz/void-filling/): Mainmark offers comprehensive void filling solutions for diverse market sectors, using specialised chemical or cementitious grouts. - [Ground Improvement](https://mainmark.co.nz/ground-improvement/): We provide advanced ground improvement solutions to enhance soil properties, improve load-bearing capacity, & ensure foundation safety. - [Re-levelling](https://mainmark.co.nz/re-levelling/): Discover Mainmark's Teretek® & JOG technologies for non-invasive, cost-effective building re-levelling solutions. - [Awards](https://mainmark.co.nz/who-are-we/awards/): Mainmark is proud to be recognised as a global leader in ground engineering solutions. Find out how Mainmark New Zealand can assist. - [Teretek®](https://mainmark.co.nz/technologies/teretek/): Explore Teretek® resin injection for precise ground improvement. Enhance bearing capacity & mitigate liquefaction. - [JOG Computer Controlled Grouting](https://mainmark.co.nz/technologies/jog-computer-controlled-grouting/): Explore Mainmark's JOG technology, a state-of-the-art, computer-controlled grout injection system for precise re-levelling in buildings - [Careers](https://mainmark.co.nz/who-are-we/careers/) - [Commercial FAQ's](https://mainmark.co.nz/resources/faqs/): Find answers to common questions about Mainmark's ground engineering solutions and services here. - [Health, Safety, Environment & Quality](https://mainmark.co.nz/who-are-we/health-safety-environment-quality/) - [Commercial Solutions](https://mainmark.co.nz/commercial-solutions/): Mainmark offers specialised ground engineering solutions for commercial projects, ensuring stability and longevity for infrastructure. - [Residential Solutions](https://mainmark.co.nz/residential-solutions/): Explore Mainmark's comprehensive residential solutions, addressing subsidence, void filling, and structural repair with innovative techniques - [Warehouses & Distribution](https://mainmark.co.nz/industries/factories-warehouses/) - [Earthquake Damage & Remediation](https://mainmark.co.nz/house-subsidence/earthquake-damage-remediation/) - [Utilities](https://mainmark.co.nz/industries/utilities/): Discover how Mainmark utilises proven ground engineering and asset rehabilitation techniques to help extend the lifespan of utilities. We specialise in remediating assets for electricity, gas, waste management, telecommunication providers, and water authorities. Cost-effective repairs and solutions to keep vital infrastructure running smoothly. - [Heritage](https://mainmark.co.nz/industries/heritage-commercial/): Mainmark specialises in re-levelling, re-supporting, and strengthening heritage buildings with a deep understanding and respect for their historical and architectural significance. - [Slab Lifting](https://mainmark.co.nz/re-levelling/slab-lifting/): Discover Mainmark's slab lifting solutions, resolving issues with sunken concrete and uneven floors in commercial and residential properties. - [House Underpinning Repair](https://mainmark.co.nz/house-subsidence/house-underpinning-repair/) - [Cracked Walls](https://mainmark.co.nz/house-subsidence/cracked-walls/) - [Foundation Repair for Unlevel Buildings](https://mainmark.co.nz/house-subsidence/foundation-repair/) - [House Subsidence Repair](https://mainmark.co.nz/house-subsidence/) - [Jammed Doors & Sticking Windows](https://mainmark.co.nz/house-subsidence/jammed-doors-sticking-windows/) - [Rail](https://mainmark.co.nz/industries/rail-solutions/): Mainmark’s innovative technologies provide rapid, non-disruptive, and cost-effective methods for re-levelling rail infrastructure, strengthening subgrade soils, and addressing structural challenges. - [Roads & Bridges](https://mainmark.co.nz/industries/roads-bridges/): Mainmark provides subsidence solutions for roads, bridges, and culverts. Improve bearing capacity, fill voids, and raise pavements without costly closures - [About Mainmark](https://mainmark.co.nz/who-are-we/about-mainmark/): Discover Mainmark New Zealand, industry leaders since 1989 in re-levelling, ground improvement, and void-filling solutions. - [Sinking Floors & Slabs](https://mainmark.co.nz/house-subsidence/sinking-floors-concrete/) - [Contact Us](https://mainmark.co.nz/contact-us/) - [Permeation Grouting](https://mainmark.co.nz/ground-improvement/permeation-grouting/): A Non-Disruptive Alternative To Traditional Underpinning in Sandy SoilsExplore the precision of Mainmark's permeation grouting technique. - [Our Team](https://mainmark.co.nz/who-are-we/our-team/) - [Home](https://mainmark.co.nz/) --- ## Projects - [Engineered Re-levelling for an Earthquake-Affected Apartment Block](https://mainmark.co.nz/engineered-relevelling-for-an-earthquake-affected-apartment-block/) - [Liquefaction Mitigation for Critical Water Treatment Infrastructure](https://mainmark.co.nz/restoring-track-performance-at-the-matapihi-rail-crossing-2/) - [Restoring Track Performance at the Matapihi Rail Crossing](https://mainmark.co.nz/projects/restoring-track-performance-at-the-matapihi-rail-crossing/): Mainmark restored track alignment at Matapihi Rail Crossing using Teretek® resin injection to stabilise ground, improve safety, and extend asset life. - [Keeping the City Moving with Tramline Stabilisation](https://mainmark.co.nz/keeping-the-city-moving-with-tramline-stabilisation/): Mainmark resolved tramline instability using Teretek® Resin Injection.This quick, non-invasive solution restored integrity & ensured passenger safety. Learn more. - [Re-levelling a 20,000m² Warehouse ](https://mainmark.co.nz/projects-re-levelling-a-20000m%C2%B2-warehouse/): Mainmark’s re-levelling of a 20,000m² warehouse used Teretek® resin injection to efficiently correct settlement and ensure safety. Learn more. - [Ground Improvement for Historic Waikato Regional Theatre](https://mainmark.co.nz/projects/ground-improvement-for-historic-waikato-regional-theatre/): Mainmark's Teretek ground improvement was chosen to support extensive development of the surrounding area, while preserving a neoclassical facade from the 1920s. - [Power Station Floor Re-supported](https://mainmark.co.nz/projects/power-station-floor-re-supported/): Without interruption to the operations of the power station, the reinforced concrete floor was fully re- supported and under-sealed against further erosion. - [Fire Station Driveway Subsidence Remediated](https://mainmark.co.nz/projects/fire-station-driveway-subsidence-remediated/): This fire station located in southern Canterbury had experienced subsidence from the weight of fire trucks driving over the slab for many years. Find out more! - [Hamilton Yacht Pump Station Water Mitigation](https://mainmark.co.nz/projects/hamilton-yacht-pump-station-water-mitigation/): An issue had arisen within the wastewater system at Hamilton Yacht Club, located on the shore of Hamilton Lake. - [Ground Improvement at Poverty Bay Rugby Club](https://mainmark.co.nz/projects/ground-improvement-at-poverty-bay-rugby-club/): Following fundraising from the community and sponsors, the club invested in redeveloping the grandstand overlooking Rugby Park. - [Tip Top Ice Cream Void Fill and Re-Level Project](https://mainmark.co.nz/projects/tip-top-ice-cream-void-fill-and-re-level-project/): Mainmark was able to provide both a cost-effective and timely solution for the client. A total lift of 180mm was achieved, across a space measuring 200m² - [Redevelopment of Wainuiomata High School using Terefil Cellular Concrete](https://mainmark.co.nz/projects/redevelopment-of-wainuiomata-high-school-using-terefil-cellular-concrete/): The lightweight nature of Terefil meant a reduced weight on the underlying soil, allowing for new school buildings to be added to the site. - [Mainmark fills Nelson culvert no longer in use](https://mainmark.co.nz/projects/mainmark-fills-nelson-culvert-no-longer-in-use/): The structure and location of the culvert presented a unique engineering challenge, so Downer, reached out to the team at Mainmark. - [Mainmark Fills Voids and Strengthens Ground Under a Paraparaumu Beach Home](https://mainmark.co.nz/projects/teretek-fills-voids-and-strengthens-ground-under-a-paraparaumu-beach-home/): A large family home in Paraparaumu Beach, near Wellington, was experiencing significant subsidence due to suspected voids beneath the concrete slab. The single- storey, brick veneer house, built in 1989, showed signs of damage that included numerous internal cracks and misalignment of doors and windows. - [Storm-water Pipeline filled with Benefil](https://mainmark.co.nz/projects/storm-water-pipeline-filled-with-benefil/): Using Benefil light-weight engineering filler grout, we completed the project for WaterCare Services - [School Building Foundations Strengthened](https://mainmark.co.nz/projects/school-building-foundations-strengthened/): School Building Foundations Strengthened by Mainmark. Find out more at Mainmark New Zealand and how we can assist with your Foundations issues. - [Ground strengthened and building re-levelled at large shopping centre](https://mainmark.co.nz/projects/ground-strengthened-and-building-re-levelled-at-large-shopping-centre/): Northwood Supa Centa in Christchurch is home to several ‘big brand’ retailers. The centre experienced liquefaction-induced ground deformations following the Christchurch Earthquakes - [Teretek® Used to Re-level Department Store Floors](https://mainmark.co.nz/projects/teretek-used-to-re-level-department-store-floors/): Teretek® Used to Re-level Department Store Floors in New Zealand. Find out more at Mainmark New Zealand and how we can assist. - [Teretek® Re-levels Busy Transport Yard](https://mainmark.co.nz/projects/teretek-re-levels-busy-transport-yard/): Teretek® Re-levels Busy Transport Yard in New Zealand. Find out more about how Mainmark could assist. - [Teretek® Brings Turangi Home Back to Level Despite Underfloor Heating Challenge](https://mainmark.co.nz/projects/teretek-brings-turangi-home-back-to-level-despite-underfloor-heating-challenge/): A residential property on a sloping block in remote Omori, Turangi near Lake Taupo in New Zealand’s North Island, experienced subsidence due to voids under the slab. - [Mainmark Protects Heritage Listed Auckland Building with Continuous Monitoring](https://mainmark.co.nz/projects/straam-protects-heritage-listed-auckland-building-with-continuous-monitoring/): The heritage Britomart Hotel (known as The White Rabbit), is a two-storey, unreinforced, bluestone masonry structure and its overall condition was poor due to its age. - [Mainmark raises and re-levels home in Upper Hutt](https://mainmark.co.nz/projects/teretek-raises-and-re-levels-home-in-upper-hutt/): When the glass sliding door of a family home in Upper Hutt, New Zealand, became misaligned, the homeowner suspected it was due to ground subsidence as the family home was built on a steep slope. A subsequent ground engineering report pointed to poor localised soil bearing capacity which was most likely caused by an ancient waterway. - [Large Christchurch House Re-levelled by JOG](https://mainmark.co.nz/projects/large-house-re-levelled-by-jog-and-uretek-resin/): This large residential property in Christchurch was subsided and tilted, due to earthquake liquefaction. With a combination of the JOG computer controlled grout and expanding structural resin injection, the house was back up to level in 18 days. - [Christchurch House Raised 60mm & Re-supported](https://mainmark.co.nz/projects/entire-house-raised-60mm-re-supported/): This large residence in Christchurch suffered differential settlement of an average 55mm from the 2010 & 2011 earthquakes. Set on a raft concrete slab, the whole house had subsided and tilted. - [Waste-water Pipeline filled with Benefil](https://mainmark.co.nz/projects/waste-water-pipeline-filled-with-benefil/): Waste-water Pipeline filled with Benefil. Find out more about Mainmark New Zealand. See how we can assist with your issues. - [Multi Story Building Re-levelled by JOG](https://mainmark.co.nz/projects/multi-story-building-re-levelled-by-jog/): Multi Story Building Re-levelled by JOG. Find out more at Mainmark New Zealand. Find out more at Mainmark New Zealand - [Residence Re-levelled by JOG & USL](https://mainmark.co.nz/projects/residence-re-levelled-by-jog-usl/): This residential property was located in one the areas of Christchurch hardest hit by the earthquakes of 2010-2011. The foundation soil was mainly non- cohesive silty-sand and the watertable in the area was generally just a metre or less below ground level. - [Commercial Building Subsidence Remediated](https://mainmark.co.nz/projects/commercial-building-subsidence-remediated/): Commercial Building Subsidence Remediated in New Zealand. Find out more about Mainmark and how they can assist. - [Shopping & Office Complex Re-levelled](https://mainmark.co.nz/projects/shopping-office-complex-re-levelled/): Shopping & Office Complex Re-levelled by Mainmark New Zealand. Find out more! - [JOG Computer-Controlled Grouting Re-levels Multi-Storey Apartment Building in Christchurch](https://mainmark.co.nz/projects/jog-computer-controlled-grouting-re-levels-multi-storey-apartment-building-in-christchurch/): JOG Computer-Controlled Grouting Re-levels Multi-Storey Apartment Building in Christchurch. Find out more! - [Cold Storage Facility Re-levelled by JOG](https://mainmark.co.nz/projects/cold-storage-facility-re-levelled-by-jog/): Cold Storage Facility Re-levelled by JOG in New Zealand. Find out more about Mainmark and how we can assist in Relevelling. - [Supermarket Raised 180mm & Re-levelled](https://mainmark.co.nz/projects/supermarket-raised-180mm-re-levelled/): Supermarket in New Zealand Raised 180mm & Re-levelled by Mainmark. Find out more at Mainmark New Zealand and how we can assist. - [Large Building Re-levelled by JOG & UDI](https://mainmark.co.nz/projects/large-building-re-levelled-by-jog-udi/): This two-storey commercial building with a footprint of 510m² had walls built of precast tilt-panels and had suffered significant earthquake subsidence.In three weeks, Mainmark rectified the settlement, by applying JOG integrated computer grouting and injections of Uretek expanding structural resins. - [3-Storey Home Unit Block Re-levelled](https://mainmark.co.nz/projects/3-storey-home-unit-block-re-levelled/): After purchasing an iconic eight-storey residential apartment building in Christchurch, new owners KCRB Ltd undertook seismic strengthening through ground remediation works. - [Warehouse Earthquake Damage Remediated](https://mainmark.co.nz/projects/warehouse-earthquake-damage-remediated/): Warehouse Earthquake Damage Remediated by Mainmark New Zealand. Find out more at Mainmark New Zealand and how we can assist. - [Apartment Building Subsidence Remediated](https://mainmark.co.nz/projects/apartment-building-subsidence-remediated/): Apartment Building Subsidence Fixed by Mainmark New Zealand. Find out more and learn how we can assist! - [Warehouse Floor Raised and Re-levelled](https://mainmark.co.nz/projects/warehouse-floor-raised-and-re-levelled/): Warehouse floor raised and re-levelled by Mainmark New Zealand. Find out more! - [House and Garage Lifted and Re-levelled](https://mainmark.co.nz/projects/house-and-garage-lifted-and-re-levelled/): House and Garage Lifted and Re-levelled by Mainmark. Find out more and enquiry how we can help! - [Christchurch House Floor Raised and Re-levelled](https://mainmark.co.nz/projects/house-floor-raised-and-re-levelled/): This building had just been completed when an earthquake struck. There was subsidence along the 25 lineal metres of its back wall with the drop ranging from 24mm to 100mm. Also affected by the earthquake were areas in the centre of the slab floor. - [Thai Factory Canteen Floor Re-levelled](https://mainmark.co.nz/projects/thai-factory-canteen-floor-re-levelled/): The problem was that this factory canteen had subsided due to weak sub-base soil. The consequent subsidence had created dangerous trip hazards at several locations and had fractured many floor tiles. - [Concrete Slab Beneath Tank Re-levelled in Lyttelton](https://mainmark.co.nz/projects/concrete-slab-on-ground-tank-re-levelled/): Uretek Deep-Injection foundation treatment was used to raise and re-level a concrete slab. This was beneath bitumen tanks located at a local farm in Lyttleton, near Christchurch. This was required to rectify earthquake damage. - [Teretek® Provides Ground Improvement and Reduces Lateral Spreading at Christchurch Residence](https://mainmark.co.nz/projects/grout-injections-improve-earthquake-resilience-for-christchurch-apartment-building-2/): A two-storey house in Christchurch suffered structural damage caused by soil liquefaction following earthquake events in 2011. - [Grout injections Improve Earthquake Resilience For Christchurch Apartment Building](https://mainmark.co.nz/projects/grout-injections-improve-earthquake-resilience-for-christchurch-apartment-building/): Grout injections Improve Earthquake Resilience in Building. Find out more about Mainmark - [Resin Injection Used to Increase Liquefaction Resistance at O’Connells Shopping Complex ](https://mainmark.co.nz/projects/resin-injection-queenstown/): O’Connells, a large retail, dining and office complex in Queenstown was undergoing a multi-million dollar redevelopment - [Art Gallery Re-supported and Re-levelled](https://mainmark.co.nz/projects/art-gallery-re-supported-and-re-levelled/): The world-class, modern Christchurch Art Gallery Christchurch Art Gallery Te Puna o Waiwhetū’ was badly shaken by the earthquakes that hit New Zealand’s South Island in 2010 and 2011. - [Decommissioning a Water Main Pipe with Terefil®](https://mainmark.co.nz/projects/decommissioning-a-water-main-pipe-with-terefil/): To safely decommission the ageing water main pipe without disrupting a local school or private property owners, Mainmark used a pressure grouting technique with its proprietary Terefi l® cementitious grout. - [Filter Ponds and Clarifier Tank at Glen Innes Water Treatment Plant Re-lined](https://mainmark.co.nz/projects/filter-ponds-and-clarifier-tank-at-glen-innes-water-treatment-plant-re-lined/): Mainmark delivered a long-term asset preservation solution for a fresh water treatment plant at Glen Innes, New South Wales, with the rectification of linings for three filter ponds and a clarifier tank. --- ## News - [Mainmark appoints Ian Thornhill](https://mainmark.co.nz/mainmark-appoints-amy-williams-2/) - [Mainmark Maintains ISO Certification](https://mainmark.co.nz/mainmark-appoints-amy-williams-2/) - [Mainmark appoints Amy Williams](https://mainmark.co.nz/mainmark-appoints-amy-williams/): Mainmark is pleased to announce the appointment of Amy Williams to the role of Chief Growth Officer. - [Mainmark announces the completion of a strategic alliance with Mitsui & Co](https://mainmark.co.nz/news/mainmark-announces-the-completion-of-a-strategic-alliance-with-mitsui-co/): Mainmark announces the completion of a strategic alliance with Mitsui & Co., Principal Investments Ltd. (MCPI), a wholly owned subsidiary of Mitsui & Co., Ltd, following the sale of its Japan operations to a fund managed by MCPI. - [Mainmark appoints Steve Killeen](https://mainmark.co.nz/news/mainmark-appoints-peter-bierton-as-new-ceo-2/): Mainmark and the Board are pleased to announce the appointment of Mr Steve Killeen as Non-Executive Director, UK. - [Mainmark appoints Peter Bierton as new CEO](https://mainmark.co.nz/news/mainmark-appoints-peter-bierton-as-new-ceo/): The Mainmark Board of Directors is pleased to announce the appointment of Peter Bierton as the new Chief Executive Officer, commencing on Monday, 2nd June 2025. - [Concrete Underpinning vs Resin Injection – The Differences](https://mainmark.co.nz/news/concrete-underpinning-vs-resin-injection-the-differences/): Concrete underpinning refers to the traditional way of underpinning which involves excavating. Resin injection refers to a more modern way of underpinning concrete by injecting a specialiSed expanding resin. - [5 reasons to invest in your property’s foundations before selling your home](https://mainmark.co.nz/news/5-reasons-to-invest-in-your-property/): Whether you're selling up or settling in, the foundations of your home matter. Build buyer confidence and appeal, avoid emergency repairs, and take advantage of non-disruptive solutions. - [How trees impact ground conditions and building foundations](https://mainmark.co.nz/news/how-trees-impact-ground-conditions-and-building-foundations/): If you’re seeing cracks, misaligned doors, or other signs of foundation movement, it’s important to consult with a professional - [Preventing and treating voids under houses, driveways and footpaths](https://mainmark.co.nz/news/news/treating-voids-under-homes/) - [Have the Auckland floods impacted the foundation of your home?](https://mainmark.co.nz/news/auckland-floods-impacted-your-home-foundation/): If you’ve noticed the signs of subsidence, assessing the extent of the damage and your next steps can be easier than you think. - [Is your rental property out of level?](https://mainmark.co.nz/news/is-your-rental-property-out-of-level/): Fixing subsidence in your rental property doesn’t have to mean putting your tenancies on hold. Whether your rental property foundation has had long term issues, or you noticed changes after a big flood season last year, it’s never too early to remedy subsidence. - [Are unstable foundations affecting your manufacturing business?](https://mainmark.co.nz/news/are-unstable-foundations-affecting-your-manufacturing-business/): Owners in manufacturing and heavy industries will be familiar with the daily wear and tear their facilities experience. Being proactive about the condition of your facilities isn't complicated. The first step is simply noticing the signs that might indicate more serious issues. Mainmark are experts in helping factory and warehouse owners faced with unlevel buildings and weak ground. - [Save time and money with a gravel raft alternative](https://mainmark.co.nz/news/gravel-raft-alternative/): Traditional soil replacement involves removing poor soil and replacing it with gravel fill, or piling — but there’s a more efficient way to do this. Over the last 30 years, developments in cellular concrete technology have revolutionised construction. - [Preserving heritage buildings to keep communities strong](https://mainmark.co.nz/news/preserving-heritage-buildings-to-keep-communities-strong/): As New Zealand's suburbs and cities grow, local governments must prioritise the preservation of heritage-listed buildings - [Remove the stress by repairing your home](https://mainmark.co.nz/news/remove-the-stress-by-repairing-your-home/): When it comes to repairing or renovating homes, nothing halts progress like not knowing where to start. The team at Mainmark has raised, re-levelled and re-supported homes, buildings and structures for over 25 years. - [The use of geophysical testing for Mainmark technologies](https://mainmark.co.nz/news/the-use-of-geophysical-testing-for-mainmark-technologies/): Geophysical testing provides a suite of tools used in geotechnical engineering to identify the soil types present and to analyse their expected behaviour. Mainmark utilises these tests to determine project suitability and design - [The sinkhole phenomenon – what causes them and how are they remediated?](https://mainmark.co.nz/news/the-sinkhole-phenomenon-what-causes-them-and-how-are-they-remediated/): Sinkholes have been known to open up in all manner of locations – beaches and oceans, residential gardens, motorways, even shopping centre carparks. --- ## Landing Pages - [Residential News](https://mainmark.co.nz/landing-pages/residential-news/) - [Subsidence Repair](https://mainmark.co.nz/subsidence-repair/) - [Sunken floors](https://mainmark.co.nz/sunken-floors/) - [Cracks in wall](https://mainmark.co.nz/cracks-in-wall/) - [Foundation Repair](https://mainmark.co.nz/foundation-repair/) - [Underpinning foundation repair](https://mainmark.co.nz/underpinning-foundation-repair/) - [Slab jacking](https://mainmark.co.nz/slab-jacking/) - [lp-relevelling](https://mainmark.co.nz/lp-relevelling/) - [Queenstown Resin Injection](https://mainmark.co.nz/landing-pages/queenstown-resin-injection/): In the past Mainmark Wellington used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Taupo Resin Injection](https://mainmark.co.nz/landing-pages/taupo-resin-injection/): In the past Mainmark Queenstown used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Hamilton Resin Injection](https://mainmark.co.nz/landing-pages/hamilton-resin-injection/): In the past Mainmark Taupo used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [North Shore Auckland Resin Injection](https://mainmark.co.nz/landing-pages/north-shore-auckland-resin-injection/): In the past Mainmark Hamilton used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Tauranga Resin Injection](https://mainmark.co.nz/landing-pages/tauranga-resin-injection/): In the past Mainmark Hamilton used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Mt Maunganui Resin Injection](https://mainmark.co.nz/landing-pages/mt-maunganui-resin-injection/): In the past Mainmark Tauranga used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Rotorua Resin Injection](https://mainmark.co.nz/landing-pages/rotorua-resin-injection/): In the past Mainmark Mt Maunganui used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Hibiscus Coast Resin Injection](https://mainmark.co.nz/landing-pages/hibiscus-coast-resin-injection/): In the past Mainmark Rotorua-resin-injection used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [West Auckland Resin Injection](https://mainmark.co.nz/landing-pages/west-auckland-resin-injection/): In the past Mainmark Hibiscus Coast used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [East Auckland Resin Injection](https://mainmark.co.nz/landing-pages/east-auckland-resin-injection/): In the past Mainmark West Auckland used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Dunedin Resin Injection](https://mainmark.co.nz/landing-pages/dunedin-resin-injection/): In the past Mainmark East Auckland used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Sumner Resin Injection](https://mainmark.co.nz/landing-pages/sumner-resin-injection/): In the past Mainmark Dunedin used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Woolston Resin Injection](https://mainmark.co.nz/landing-pages/woolston-resin-injection/): In the past Mainmark Sumner used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Parklands Resin Injection](https://mainmark.co.nz/landing-pages/parklands-resin-injection/): In the past Mainmark Woolston used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Hoon Hay Resin Injection](https://mainmark.co.nz/parklands-resin-injection-2/): In the past Mainmark Hoon Hay used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Somerfield Resin Injection](https://mainmark.co.nz/landing-pages/somerfield-resin-injection/): In the past Mainmark Hoon Hay used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Spreydon Resin Injection](https://mainmark.co.nz/landing-pages/spreydon-resin-injection/): In the past Mainmark Somerfield used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Redcliffs Resin Injection](https://mainmark.co.nz/landing-pages/redcliffs-resin-injection/): In the past Mainmark Spreydon used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Scarborough Resin Injection](https://mainmark.co.nz/landing-pages/scarborough-resin-injection/): In the past Mainmark Redcliffs used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Marshland Resin Injection](https://mainmark.co.nz/marshland-resin-injection/): In the past Mainmark Marshland used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [New Brighton Resin Injection](https://mainmark.co.nz/landing-pages/new-brighton-resin-injection/): In the past Mainmark Marshland used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Napier Resin Injection](https://mainmark.co.nz/landing-pages/napier-resin-injection/): In the past Mainmark New Brighton used the Uretek® resin injection methods. This expanding resin was primarily a slab lifting technology and had been used extensively for raising, re-levelling, re-supporting and strengthening moving and sunken structures on or in the ground. - [Cracked Walls Takapuna](https://mainmark.co.nz/cracked-walls-takapuna/) - [Cracked Walls Belmont](https://mainmark.co.nz/cracked-walls-belmont/) - [Cracked Walls Bayswater](https://mainmark.co.nz/cracked-walls-bayswater/) - [Cracked Walls Birkdale](https://mainmark.co.nz/cracked-walls-birkdale/) - [Cracked Walls Avondale](https://mainmark.co.nz/cracked-walls-avondale/) - [Cracked Walls Belfast](https://mainmark.co.nz/cracked-walls-belfast/) - [Cracked Walls Addington](https://mainmark.co.nz/cracked-walls-addington/) - [Cracked Walls Fendalton](https://mainmark.co.nz/cracked-walls-fendalton/) - [Cracked Walls Kaikoura](https://mainmark.co.nz/cracked-walls-kaikoura/) - [Cracked Walls Invercargill](https://mainmark.co.nz/cracked-walls-invercargill/) - [Cracked Walls Lower Hutt](https://mainmark.co.nz/cracked-walls-lower-hutt/) - [Cracked Walls Waterloo](https://mainmark.co.nz/cracked-walls-waterloo/) - [Cracked Walls Avalon](https://mainmark.co.nz/cracked-walls-avalon/) - [Cracked Walls Feilding](https://mainmark.co.nz/cracked-walls-feilding/) - [Cracked Walls Mt Eden](https://mainmark.co.nz/cracked-walls-mt-eden/) - [Cracked Walls New Market](https://mainmark.co.nz/cracked-walls-new-market/) - [Cracked Walls Papakura](https://mainmark.co.nz/cracked-walls-papakura/) - [Cracked Walls Remuera](https://mainmark.co.nz/cracked-walls-remuera/) - [Cracked Walls Redcliffs](https://mainmark.co.nz/cracked-walls-redcliffs/) - [Cracked Walls Somerfield](https://mainmark.co.nz/cracked-walls-somerfield/) - [Cracked Walls Remeura](https://mainmark.co.nz/cracked-walls-remeura/) - [Cracked Walls Devonport](https://mainmark.co.nz/cracked-walls-devonport/) - [Cracked Walls Hamilton](https://mainmark.co.nz/cracked-walls-hamilton/) - [Cracked Walls Ponsonby](https://mainmark.co.nz/cracked-walls-ponsonby/) - [Cracked Walls Nelson](https://mainmark.co.nz/cracked-walls-nelson/) - [Cracked Walls Takapuna](https://mainmark.co.nz/cracked-walls-takapuna/) - [Cracked Walls Parnell](https://mainmark.co.nz/cracked-walls-parnell/) - [Cracked Walls Rosedale](https://mainmark.co.nz/cracked-walls-rosedale/) - [Cracked Walls Westcoast](https://mainmark.co.nz/cracked-walls-westcoast/) - [Cracked Walls Tasman](https://mainmark.co.nz/cracked-walls-tasman/) - [Cracked Walls Otago](https://mainmark.co.nz/cracked-walls-otago/) - [Cracked Walls Gisborne](https://mainmark.co.nz/cracked-walls-gisborne/) - [Cracked Walls New Brighton](https://mainmark.co.nz/cracked-walls-new-brighton/) - [Cracked Walls Spreydon](https://mainmark.co.nz/cracked-walls-spreydon/) - [Cracked Walls Woolston](https://mainmark.co.nz/cracked-walls-woolston/) - [Cracked Walls Scarborough](https://mainmark.co.nz/cracked-walls-scarborough/) - [Cracked Walls Taupo](https://mainmark.co.nz/cracked-walls-taupo/) - [Cracked Walls Northland](https://mainmark.co.nz/cracked-walls-northland/) - [Cracked Walls Tauranga](https://mainmark.co.nz/cracked-walls-tauranga/) - [Cracked Walls Rotorua](https://mainmark.co.nz/cracked-walls-rotorua/) - [Cracked Walls Mt Maunganui](https://mainmark.co.nz/cracked-walls-mt-maunganui/) - [Cracked Walls East Auckland](https://mainmark.co.nz/cracked-walls-east-auckland/) - [Cracked Walls West Auckland](https://mainmark.co.nz/cracked-walls-west-auckland/) - [Cracked Walls North Shore Auckland](https://mainmark.co.nz/cracked-walls-north-shore-auckland/) - [Cracked Walls Hibiscus Coast](https://mainmark.co.nz/cracked-walls-hibiscus-coast/) - [Cracked Walls Milford](https://mainmark.co.nz/cracked-walls-milford/) - [Cracked Walls Burnside](https://mainmark.co.nz/cracked-walls-burnside/) - [Cracked Walls Hawkes Bay](https://mainmark.co.nz/cracked-walls-hawkes-bay/) - [Cracked Walls Taranaki](https://mainmark.co.nz/cracked-walls-taranaki/) - [Cracked Walls Bay of Plenty](https://mainmark.co.nz/cracked-walls-bay-of-plenty/) - [Cracked Walls Manawatu](https://mainmark.co.nz/cracked-walls-manawatu/) - [Cracked Walls Whanganui](https://mainmark.co.nz/cracked-walls-whanganui/) - [Cracked Walls Henderson](https://mainmark.co.nz/cracked-walls-henderson/) - [Cracked Walls Helensville](https://mainmark.co.nz/cracked-walls-helensville/) - [Cracked Walls Palmerston North](https://mainmark.co.nz/cracked-walls-palmerston-north/) - [Cracked Walls Glendene](https://mainmark.co.nz/cracked-walls-glendene/) - [Cracked Walls Canterbury](https://mainmark.co.nz/cracked-walls-canterbury/) - [Newmarket Underpinning](https://mainmark.co.nz/landing-pages/newmarket-underpinning/): With a sound knowledge of Burnside unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Belfast Underpinning](https://mainmark.co.nz/landing-pages/belfast-underpinning/): With a sound knowledge of Burnside unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Lower Hutt Underpinning](https://mainmark.co.nz/landing-pages/lower-hutt-underpinning-2/): With a sound knowledge of Belfast unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Kaikoura Underpinning](https://mainmark.co.nz/landing-pages/kaikoura-underpinning/): With a sound knowledge of Lower Hutt unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Fendalton Underpinning](https://mainmark.co.nz/fendalton-underpinning/): With a sound knowledge of Fendalton unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Feilding Underpinning](https://mainmark.co.nz/landing-pages/feilding-underpinning/): With a sound knowledge of Fendalton unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Papakura Underpinning](https://mainmark.co.nz/landing-pages/papakura-underpinning/): With a sound knowledge of Feilding unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Whanganui Underpinning](https://mainmark.co.nz/landing-pages/whanganui-underpinning/): With a sound knowledge of Papakura unique local conditions, Mainmark utilises its Teretek® engineered resin injection solution to effectively raise, re-level, and re-support footings under a home. - [Cracked Walls Auckland](https://mainmark.co.nz/auckland-cracked-wall-repair/) - [Cracked Walls Wellington](https://mainmark.co.nz/cracked-walls-wellington/) - [Cracked Walls Christchurch](https://mainmark.co.nz/cracked-walls-christchurch/) - [Cracked Walls Queenstown](https://mainmark.co.nz/cracked-walls-queenstown/) - [Cracked Walls Dunedin](https://mainmark.co.nz/cracked-walls-dunedin/) - [Cracked Walls Waikato](https://mainmark.co.nz/cracked-walls-waikato/) --- # # Detailed Content ## Pages --- ## Projects --- ## News --- ## Landing Pages - Published: 2026-01-29 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/subsidence-repair/ --- - Published: 2026-01-29 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/sunken-floors/ --- - Published: 2026-01-28 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/cracks-in-wall/ --- - Published: 2026-01-22 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/foundation-repair/ --- - Published: 2025-11-21 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/underpinning-foundation-repair/ --- - Published: 2025-11-20 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/slab-jacking/ --- - Published: 2025-11-07 - Modified: 2026-07-10 - URL: https://mainmark.co.nz/lp-relevelling/ --- ---