Safeguard your property’s structural integrity from the potential hazards of subsidence with the knowledge and proficiency of Resinject. We offer services in underpinning Newcastle wide, as well as throughout the New South Wales region.
These services are tailored to reduce the likelihood of damage to your residential, commercial, or government property caused by subsidence and cater to a range of needs from concrete slab levelling to house foundation repairs and beyond.
How to Identify Subsidence
Soil subsidence or the downward shift of soil can result from erosion and fluctuations in ground moisture levels. Man-made factors, such as vibrations from nearby construction and development, may also contribute to this issue. The sinking of soil can lead to your property’s foundations sinking as well, causing various symptoms that can significantly impact your property, including:

Sunken or sinking foundations

Sunken or sinking concrete slabs

Uneven floors

Cracked walls

Jammed doors and windows

Holes and voids

Unlevel structures and more
At Resinject, we have devised a minimally invasive process to address the issue of subsidence. Our method involves injecting a non-toxic, Australian-made RSJ170 resin into the affected soil areas. In turn, the resin enhances stability and strength, effectively addressing house foundation repairs, floor levelling, and other concrete repair needs.
We Provide Reliable Underpinning Services in Newcastle
With over 60 years of combined experience in providing top-quality underpinning services, Resinject has the expertise to assist a broad range of sectors in Newcastle and the Greater New South Wales region. Our underpinning services cater to:
- Residential underpinning
- Industrial and commercial
- Transport and infrastructure / civil projects
- Mining
- Government
For your peace of mind, all underpinning work comes with a 50-year product warranty. This ensures that you receive the same level of support as your property once we’ve completed the job. To schedule a structural consultant to visit your Newcastle property, contact Resinject today.
See what some of our recent clients in Newcastle had to say!

Excellent job! The staff has been very friendly and helpful! Very happy with the results! Much better…
Anna, Newcastle East

Richard and the team did an outstanding job. Our huge home had moved due to reactive soil and Resinject…
Galini, Merewether

Resinject was a critical partner in completing this project, providing a cost-effective and innovative…
Jamie, Project Manager
Here’s how our Underpinning Repairs process works
By injecting our resins, compromised soils will be consolidated and stabilised, allowing for permanent wall repair. Our approach involves:
Prepare
Our experts drill a series of tiny holes in the affected area
Inject
We inject our specially formulated poly urethane Resin
Expand
Our Resin fills the voids, hardens instantly which compacts the ground
Result
The area is instantly reinforced and even re – levelled if required
Here’s why you should choose Resinject
Combined 100+ Years Experience
50 Year Product Warranty
Licenced
Builders
Certified Australian Resin
ISO Certified 9001, 14001, 45001
Frequently Asked Questions
Leaving an unstable structure can cause further issues. By having an early assessment/treatment, will save further costs and lessen further damage from occurring.
Most residential jobs are finished within a few hours. Bigger projects may take over a day; your Structural Consultant will discuss the time frame as part of the free site assessment and quoting.
Only a licenced builder has the knowledge and experience required to assess how a building’s internal structure is going to react to ground consolidation and stabilisation.
Drawing on over 60 years’ combined experience, Resinject only uses a resin that has an Australian Standard resin and can be injected to a depth of up to 3.5 metres if necessary with the necessary re-support installed We do offer a 50 year guarantee against shrinkage with our product.
Injection depth can be critical to ensuring long-term ground consolidation. Each situation varies and the injection depth is determined by the state of the ground and or dependant on geo-technical reports. That’s why we inject our resin at multiple and different depths varying between 800mm and 3.5m.
If there are utility services in close proximity to the injection points, we may have to clear some areas for a visual inspection. Otherwise, only small holes are drilled to allow our product to be injected. These are sealed with non-shrink grout upon completion.