Councils have a duty of care to citizens to maintain council-owned infrastructure. Mainmark has deep expertise working with councils to remediate structural damage caused by subsidence, weak ground, weak foundations, and other ground stabilisation issues, such as earthquake-induced liquefaction in seismic regions.

For more than 20 years, Mainmark ground engineering and asset preservation solutions have assisted councils to extend the life of important infrastructure and re-level and re-support sinking buildings.

Roads, community centres, car parks, and other council facilities require regular upkeep to maximise their utility and maintain standards of safety. However, sinking slabs and sinking floors can cause extensive damage, with the emergence of surface hazards to foot and vehicle traffic, persistent water ingress and other visible signs of deterioration just some of the common outcomes.

Mainmark has extensive experience applying its state-of-the-art ground engineering solutions to help remediate council assets affected by subsidence or dilapidation. We can lift and re-level buildings, avoiding the expense, inconvenience and disruption associated with traditional underpinning. Our minimally-invasive techniques allow councils, in many instances, to remediate structures without the need to vacate buildings or close access to infrastructure.

When ageing infrastructure needs to be decommissioned, Mainmark can fill in-ground pipes without the disruption and cost of excavation by using highly flowable solutions that can be pumped across long distances to fill large voids and pipes.

Mainmark uses environmentally inert, non-toxic solutions that are long-lasting and reliable, protecting the structure and increasing its resilience for years to come.


We help councils solve multiple problems

  • Provide fast and efficient solutions to fix council assets such as roads, car parks, swimming pools, libraries and community centres, by addressing the effects of subsidence and weak ground including re-levelling and re-supporting sinking foundations and surfaces
  • Identify site specific remediation approaches using one or more of our innovative solutions, including Teretek engineered resin injection, Terefil lightweight cementitious fill and JOG Computer-Controlled Grouting
  • Deliver non-disruptive fill solutions for council assets impacted by large voids and holes caused by subsidence or ageing . We fill large holes and voids with Terefil, a lightweight fast-flowing cementitious fill solution that provides long-lasting and reliable ground stability.
  • Remediate council facilities affected by structural damage, including sinking floors and cracked walls, by raising, re-levelling and re-supporting building structures
  • Address fast deadlines by avoiding expensive and disruptive underpinning using Teretek, our proprietary, non-invasive resin injection solution that delivers proven results in a short timeframe
  • Strengthen unstable ground and weak foundations without the need to vacate buildings or close public infrastructure.

Success Story:

Rehabilitating a leaking water main to save water

A New South Wales city council was faced with a leaking water main located in a residential street, resulting in a loss of water pressure for nearby residents. Mainmark used its trenchless pipe rehabilitation technology to successfully upgrade the water main in just two days and extend its service life by at least 50 years.

Success Story:

Re-levelling a swimming pool for better drainage and filtration

  • A 25m-long public swimming pool had sunk into the ground by as much as 200mm towards the deep end, interfering with the filtration system’s ability to thoroughly reticulate the water. The pool had been built in sections of precast concrete, so Mainmark was able to apply its resin injection solution to bring the structure back to an acceptable level while avoiding over-lifting at any stage and disturbing the joints between sections of the pool. Alternative options were identified as extremely costly, with building of a new aquatic centre estimated to require millions of dollars. Instead, Mainmark provided a precise lifting program and filled the voids under the internal pool slab to return the public facility back to normal operation.

Success Story:

Decommissioning redundant pipes

Terefil was used to fill an in-ground water pipe as part of an infrastructure upgrade project in the Hunter region of New South Wales. The lightweight cementitious fill is a proven and innovative solution for pipe decommissioning. In this case, the ageing pipe ran under a highway, school grounds and private land which meant digging it out was not feasible. Thanks to the Terefil’s pumpability, the entire 620m length of pipe was able to be filled from one single access point.