Since 1989, Mainmark has provided successful ground improvement, level correction, and void filling solutions, addressing subsidence in residential properties.
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Fast, cost effective & non-invasive subsidence solutions to fix cracked walls and cracked bricks
Fast, clean and non-invasive lifting of sinking floors and slabs
Our solutions are more cost-effective, with minimal disruption to the area
We offer the most advanced house re-levelling and underpinning technology in the market
The world’s most advanced earthquake remediation, liquefaction mitigation and ground-strengthening technologies
Resin Injection Underpinning– the modern alternative to traditional underpinning
Ground improvement modifies a soil’s properties, improving its load bearing capacity or resilience against liquefaction
We re-level buildings that have experienced subsidence, settlement, or other structural issues leading to uneven floors and foundation cracks
We can underpin, raise and re-level sinking foundations
Comprehensive void filling solutions for diverse market sectors, using specialised chemical or cementitious grouts
Our non-invasive and cost-effective solution is a safe way of re-levelling concrete slabs with soil settlement or subsidence problems
Mainmark has delivered ground engineering solutions to commercial businesses and properties for 35 years. Capitalising on this expertise and knowledge, our range of innovative products and advanced solutions provide remediation of assets and structures.
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State-of-the-art, non-invasive solutions to ensure productivity is maintained
Address a range of underlying issues impacting buildings and infrastructure due to weak or unstable ground
We remediate assets for electricity, gas, waste management and telecommunication providers, as well as water authorities
Our non-invasive approach is essential when treating these significant and sometimes fragile structures
Ground improvement modifies a soil’s properties, improving its load bearing capacity or resilience against liquefaction
We re-level buildings that have experienced subsidence, settlement, or other structural issues leading to uneven floors and foundation cracks
Our non-invasive and cost-effective solution is a safe way of re-levelling concrete slabs with soil settlement or subsidence problems
Comprehensive void filling solutions for diverse market sectors, using specialised chemical or cementitious grouts
Terefil is a unique, specialist flowable fill material that can fill massive pipelines and concrete culverts quickly and cost-effectively
Our innovative technologies offer advanced site-specific solutions for revitalising ageing or damaged buildings, assets and infrastructure.
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Keeping Australia's roads and bridges operational with minimal disruption
The fast, non-disruptive pavement stabilising solutions for Australia's airports
Re-supporting port terminals and seawalls with minimal disruption to operation whilst prioritising safety
Keeping railways on track with innovative level correction solutions
Ground improvement modifies a soil’s properties, improving its load bearing capacity or resilience against liquefaction
We re-level buildings that have experienced subsidence, settlement, or other structural issues leading to uneven floors and foundation cracks
Our non-invasive and cost-effective solution is a safe way of re-levelling concrete slabs with soil settlement or subsidence problems
Comprehensive void filling solutions for diverse market sectors, using specialised chemical or cementitious grouts
Terefil is a unique, specialist flowable fill material that can fill massive pipelines and concrete culverts quickly and cost-effectively
If you cant find what you’re after please don’t hesitate to contact us.
Submit your enquiry using the online form with a brief description of the issue. A Mainmark expert will be in touch within 24–48 hours (excluding weekends and public holidays).
After clicking Submit, you’ll receive an email with the next steps—please check your inbox and spam folder.
Re-levelling plays a critical role in maintaining the structural integrity and functionality of a building. Here’s a summary of its purpose, causes, and benefits:
Purpose of Re-Levelling
Soil Reactivity: Expansion and contraction of soil due to moisture changes.
Environmental Factors: Flooding, tree roots, or droughts affecting the ground stability.
Poor Building Practices: Substandard construction techniques or materials.
Timber Shrinkage: Deterioration or warping of wooden components in the sub-floor.
Sloping Floors: Uneven walking surfaces that compromise safety and aesthetics.
Malfunctioning Doors and Windows: Misalignment caused by structural shifts.
Cracks in Plaster Walls: A common sign of uneven settling.
Loose or Bouncing Floors: Loss of stability and strength in the flooring system.
Re-Levelling: Focuses on correcting the alignment of existing stumps and structural components. It’s often a preliminary step before restumping.
Restumping: Involves completely removing deteriorated timber stumps and replacing them with durable materials like concrete, steel, or treated timber.
Re-levelling is essential for ensuring the longevity and safety of a building, particularly in areas with reactive soil or older structures with timber stumps.
Mainmark also provide the following in Australia: wall crack repairs, sinking floor repair, Concrete slab repair, sinking foundation repair, underpinning, ground improvement, re-levelling, subsidence repair, void filling and slab lifting
Mainmark provides underpinning in, Canberra, Hobart, Townsville NSW, QLD, SA, WA, Tasmania, Victoria plus the major cities of Sydney, Melbourne, Perth, Adelaide, Brisbane, Newcastle
Submit your enquiry using our online form. Include a brief message about the type of foundation issues you are experiencing.
Our friendly customer service team will be in touch to schedule a site assessment that suits you.
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.
© 2026 The Mainmark group of companies. ‘Mainmark®’, ‘Terefil®’, ‘Terefirm®’ and ‘Teretek®’ are trademarks of the Mainmark group of companies.
Mainmark Ground Engineering Pty Ltd
ABN: 51 606 182 503
1800 623 312
Australia
