Frequently Asked Questions


Frequently Asked Questions

Our Company

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 Civil and Mining Services Quality Management System is fully ISO 9001:2008 approved and 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.

We have successfully treated over 11,000 sites in Australasia. With a global footprint across 15 locations and over 200 staff worldwide, Mainmark has completed many tens of thousands of projects.

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

Our Technologies

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.

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Primus Line® is a cost-effective and environmentally inert trenchless technology for rehabilitating and fixing high pressure hoses and pipelines.

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.

Uretek® 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.

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.

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.

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.

PowerPiles are expanded polymer compaction pillars for installation under existing buildings to increase foundation support. They suit strata which will yield under pressure, like sandy soil or other loose material. They are efficient, combining soil replacement and compaction grouting elements.

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.

ENCAP6™ a technologically advanced solution for revitalising ageing infrastructure. It acts by sealing, protecting and structurally reinforcing ageing assets. ENCAP6™ stops asset decay in six essential ways: Chemical Resistance, Adhesion, Inflow and Infiltration, Structural Enhancement, Abrasion Resistance, Permanent Solution.

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 ground, filling holes, voids and pipes, earthquake remediation, and revitalising ageing infrastructure.

Our Processes

Level Correction

Using advanced technologies and methods which include Teretek ResinUretek Resin, JOG Computer-Controlled Grouting, Jet Grouting and PowerPiles. Mainmark is able to correct ground subsidence and get your property back to level.

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.

Our level correction methods involve very minimal disruption to your property. A lot like keyhole surgery, injection of materials is usually through tiny holes (16mm, but as small as 6mm if used inside the house). The holes are few and far between.

Tile or parquet floor?

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


If carpet is present we would roll it back from the affected area but often it can be loosened from the tack strip along the wall or otherwise injection tubes can be inserted through carpet.

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

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

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

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

Holes and Void Filling

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

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

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

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.

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Revitalising Ageing Infrastructures

Using advanced technologies and methods which include ENCAP6™. Mainmark specialises in the design, manufacture and installation of this corrosion protection system which seals, protects and structurally reinforces ageing assets.

Generally any infrastructure that needs decay addressed and to be revitalised which include concrete and steel infrastructure, such as bridges, lift stations, pipe and tank relining and manholes.

Using ENCAP6™, Mainmark works to reduce capital replacement costs and deliver significant labour and capital savings for typical applications which include bridges, sewerage lift stations, pipe and tank relining and manholes.

General FAQs

Most level correction projects do not require occupants to vacate their property and in most cases furniture does not need to be moved.

Very little, if any. We use structural resin injection technology which is likened to “keyhole surgery”, or JOG Computer-Controlled Grouting, with no major excavation and minimal disruption or mess. Mainmark methods are clean, quiet and odourless. Work is controlled from a fully equipped, self-contained mobile unit parked outside your residence.

This will depend on a case by case basis. Compared to traditional concrete underpinning, with disruptions and consequential restoration expenses, Mainmark technologies are extremely cost-effective.

The work will be carried out by Mainmark Ground Engineering, using our own experienced technicians and Quality Management system.

The materials we use have been developed for use underground and have been specifically engineered to resist shrinkage and deterioration. Materials are warranted by Mainmark based on various product warranties (please contact us to see which warranties apply in your region or country).




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 AU: 1800 623 312    NZ: 0800 873 835

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