Our company

Why choose Mainmark as your preferred geotechnical expert?

Mainmark offers unique, innovative solutions for rectifying problems with foundation ground in residential, industrial, commercial, heritage and civil engineering situations. Mainmark has also led the world in developing and offering the most advanced and accurate systems in ground engineering and asset preservation. Our methods are some of the most reliable, practical and least disruptive ways of re-levelling buildings.

Mainmark Australia and New Zealand has an Accredited integrated Management system meeting the requirements of ISO 9001:2015 Quality, 14001:2015 Environmental and ISO 450051:2018 Occupational Health & Safety Management Systems

Mainmark has been a proud member of the Master Builders Association in several states of Australia and in New Zealand since 1993. In New Zealand, Mainmark’s methods are cited within the MIBE Guidance Document (refer MIBE Document, appendix A1, pages A1.8 am A1.12), comply with council consent requirements and insurable. Many earthquake affected structures (homes, offices and utilities) in Christchurch have been re-levelled by us.

How many projects has Mainmark completed?

We have successfully treated over 30,000 sites in Australasia. With a global footprint across 15 locations and over 200 staff worldwide, Mainmark has completed many tens of thousands of projects.

Are our products safe and environmentally friendly?

Our methods are environmentally inert, and have no detrimental effects on the environment.

Our technologies

What is Teretek?

Teretek® structural resin injection is a modern alternative to traditional underpinning. It is a unique and patented means of improving the bearing capacity of foundation soils, re-levelling settled buildings and other structures.

What is JOG?

JOG Computer-Controlled Grouting is a unique system that is extensively used for re-levelling large and complex structures, such as multi-storey residential and commercial buildings. It enables level correction without the use of hydraulic jacks and temporary lifting platforms.

What is Terefil®?

Terefil® is the world’s most advanced structural light-weight polymer modified cementitious based filler. It is an advanced engineered fill material providing an excellent solution when granular fills or aggregate material options are too heavy, site access is limited, or project schedules are extremely tight.

What is Terefirm®?

Terefirm™ Resin Injection – the next generation in ground improvement, liquefaction mitigation and bearing capacity enhancement solutions

Remediating structures affected by serious ground issues, such as liquefaction, poor compaction or settlement, has up until now been a complex process. Weak ground can compromise building foundations and footings, putting the structure at risk of collapse. Ground improvement solutions that are currently available are limited, highly invasive, costly, time consuming and messy. If the ground improvement work requires a building tenant to relocate, the interruption to business can add further losses to both the business operator and building owner.

What is Permeation Grouting?

Permeation Grouting creates ground cohesion before excavation. It helps strengthen sands and gravels, and repairs structural formations in noncohesive soils at depths as great as 60m. The process produces a solidified mass to support increased load and fill voids in the soil.

What other specialised resins, gels and coatings does Mainmark offer?

Mainmark offers products and applications that include engineered coatings and linings for large pipes and utility services; high performance water control treatments that can stop fast flowing water quickly in construction and civil projects, as well as in emergency situations, and waterproofing solutions to seal and stabilise water ingress in dry or water-bearing conditions. Mainmark’s industrial strengthening solutions provide concrete and steel coatings for building and infrastructure protection, precisely designed and engineered for site-specific needs. All Mainmark solutions are cost effective, quick to apply and non-invasive.

What is Jet Grouting?

Jet Grouting is accomplished with high pressure, high velocity jets located in a grout monitor attached to a drill stem. It uses a complex process of water-jetting and slurry jetting which produces an end result of ‘soil-crete columns’ with high strength and low hydraulic conductivity.

What is STRAAM?

Measuring a structure’s heartbeat, or the normal vibrations in a that occur in response to environmental factors, helps identify any abnormal responses that may indicate structural damage or weakness. Structural analysis can provide an early warning of potential weaknesses or damage. Find out more

What was the Uretek method?

The Uretek ground engineering and grout technologies were based on the expansive power of multi-component mixtures of structural geopolymer resins and hardeners.

In the past Mainmark 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.

Building on our experience of raising, re-levelling and re-supporting structures and correcting foundation ground issues, combined with our knowledge of the unique local conditions, Mainmark developed our proprietary Teretek resin injection solution.

What type of structures can Mainmark technologies be used for/on?

Mainmark methods provide ideal ground engineering and asset preservation solutions for numerous structures, of varying size and type, including residential, commercial, infrastructure, heritage, civil and mining projects. We offer methods such as level correction of sinking floors and buildings, strengthening weak and unstable groundfilling holes, voids and pipesearthquake remediation, and revitalising ageing infrastructure.

Our processes

Level correction

How does Mainmark address level correction?

Using advanced technologies and methods which include Teretek ResinTerefirm ResinJOG Computer-Controlled Grouting and Jet Grouting. Mainmark is able to correct ground subsidence and get your property back to level.

What process does Mainmark employ to ensure that the slab is raised to an even, level plane?

Employing laser devices, and other computer or technological controls, our technicians use sophisticated procedures throughout the process to carefully monitor and govern the amount of slab lift.

How much can Mainmark technologies lift?

Theoretically there is no limit to the amount of lift possible. Our technology has been used previously to lift structures from 1mm to 1300mm!

How long does it take to re-level or lift a structure?

Depending on the situation and methods used, most projects often can be re-levelled within a few hours, a few days or up to a few weeks.

Weak or unstable ground

How does Mainmark address weak or unstable ground?

Using advanced technologies and methods which include Teretek Resin, Uretek Resin, PowerPiles and Jet Grouting. Mainmark is able to rectify your soil stabilisation and ground compaction issues.

What structures that have weak or unstable ground can this technology be applied on?

Majority of on-ground structures including buildings, concrete floors, driveways, roads, paved airport runways and more.

Holes and void filling

How does Mainmark address holes and voids?

Using advanced technologies and methods which include Teretek Resin, Permeation GroutingTerefil® and Uretek Deep-Injection. Mainmark is able to fill your holes and voids and stabilise the surrounding structures.

What applications can void fill method be used on?

Generally any structure or foundation that needs filling or stabilising which include:

  • Decommissioning culverts, pipes and tunnels
  • Mass fill for large voids, tanks, sink holes and abandoned mines
  • Bridge approach
  • Landslip repair
  • Retaining wall and wing wall backfill
  • Services trench and manhole backfill
  • Permeable sub-grade beneath roads and sporting facilities

Earthquake remediation

How does Mainmark address ground subsidence caused by earthquakes?

Using advanced technologies and methods which include Teretek ResinUretek ResinJOG Computer-Controlled Groutingand Jet Grouting. Mainmark offers the world’s most advanced earthquake remediation, liquefaction mitigation and ground-strengthening technologies.

What experience does Mainmark have with earthquake-related level correction?

In short, a lot. In the past five years, we have level-corrected over 500 projects damaged by the Christchurch quakes. Prior to this Mainmark has worked on earthquake-specific repairs since 1989. More Information

Asset preservation

How can Mainmark's asset preservation solutions cater to your work site needs?

Mainmark specialises in advanced, site-specific solutions for revitalising, sealing, protecting and structurally reinforcing ageing or damaged buildings and infrastructure including tunnels, shafts and basements impacted by weak ground and water ingress.

This business unit also facilitates the location of underground services on residential and commercial job sites.

What solutions can Mainmark provide to revitalise ageing and decaying infrastructure?

Linings and Coatings – Our innovative range of protective resin and gel coatings provide exceptional environmental, chemical and abrasion resistance to protect the long-term structural integrity of civil infrastructure and building assets including manholes, tunnels, lift shafts, pipes, tanks, drains and basements.

Water Mitigation and Control – Mainmark has a range of high-performance water mitigation and control solutions for all types of works, such as below-ground carparks, basements, tunnels, retaining walls, dam walls and other subterranean infrastructure, including for emergency situations.

Concrete and Steel Rehabilitation – The products Mainmark uses are engineered to site-specific requirements and have been proven to chemically bond to concrete surfaces in the most challenging environments with exceptional adhesion capabilities. A range of pure polyurea and polymer coatings permeate, fill and stabilise both large and small areas to address leaking, cracking and surface deterioration.

Other Resins – Mainmark can use a variety of tested and proven specialised engineered resins to bind weak strata and fill voids, crevices, and large cavities in civil and mining applications.

What solutions can Mainmark's service location provide?

Mainmark’s Service Location team supports utility and asset owners, property owners and managers, building professionals and trades, engineers, consultants and civil construction companies and homeowners by providing an understanding of underground services with detailed and accurate location mapping and reporting.

General FAQs

How does Mainmark help to bring the house or building back to level?

Our technicians establish the best approach to raise and re-level your home, creating a plan that addresses the identified ground conditions. Laser levels are used to carefully monitor progress and determine the amount of lift required.

Will there be disruption or mess at my property?

Our level correction methods involve very minimal disruption to your property. Similar to keyhole surgery, Teretek resin is usually injected through tiny holes around 16mm in diameter, and as small as 6mm if applied inside the house.

What if I have a tiled or timber floor?

We position holes as unobtrusively as we can, for instance beside or beneath a skirting board, where possible. These tiny holes are practically unnoticeable if they are filled with a small wooden plug or drilled through the tile joints.

Does my carpet need to be removed?

If carpet is present in the room, it would need to be rolled back from the affected area. Most often, it can simply be loosened from the tack strip along the wall.

What happens to the out of level floor?

Mainmark endeavours to re-level floors. However, there are times and conditions when lifting may damage the structure. In this case, Mainmark raises the floor to the extend that conditions allow and focuses on ground improvement to mitigate future settlement.

What do I need to do before Mainmark commences its work?

One of our experienced ground engineering specialist will assess your site including the surrounding soil and advise what is required, providing a detailed scope of works in the quotation documents. Service location is required on all properties to mitigate the risk of Teretek material affecting in-ground services. Damaged plumbing is often part of the cause of settlement, subsidence and cracking. When this is identified, Mainmark recommends the plumbing is repaired before the works commence. Tree roots are also often a cause of foundation problems. In some instances, Mainmark may recommend that root barriers be installed or trees are removed. This can be done either before or after treatment. Finally, Mainmark rigs will require parking at the front of your property for access on the day.

Is there any risk of damage to the underground services around my property?

Mainmark Teretek resin penetrates the ground via multiple injection points. Where in-ground services are in disrepair (e.g. cracks or separated joints in the pipes), the resin can enter pipes and cause a blockage. In this case, the responsibility to remove the material sits with the property owner. If Mainmark drills into a service that has been located during the service location, Mainmark is responsible for removing the material.

Do you provide a warranty?

The materials we use have been developed for underground use and are engineered to resist shrinkage and deterioration. Teretek resin materials are warranted by Mainmark for an industry-leading 50 years in Australia and New Zealand.

How do I know if I’m getting value for money?

Mainmark does not offer a ‘one size fits all’ solution. We assess each property in person to ensure a bespoke solution is developed for each home. We provide a comprehensive estimate of the materials required, how much time the job is likely to take, and are available to answer any questions along the way. Our experience working in many different environments, often in the same suburbs as the home requiring work, helps us to advise on the expected outcome of the work based on the type of house and the soil conditions in the area.

What should I do to best manage my house into the future?

Mainmark recommends strict adherence to the provided CSIRO information ‘Foundation Maintenance and Footing Performance: A Homeowner’s Guide’, including attention to adequate surface drainage, maintaining water services, removal of tree roots etc.