If you’ve noticed uneven floors, sloping concrete, or cracks forming in your walls, it may be a sign that the ground beneath your property is shifting. One possible cause is subsidence, which refers to the downward movement of soil that affects the stability of your foundations. This can lead to a range of structural issues, including a house that needs releveling. However, subsidence isn’t the only reason your home might become unlevel. Other causes such as soil erosion, tree roots or water damage can also play a role. To accurately diagnose the problem and prevent further damage, it’s important to arrange a professional inspection. Resinject’s licensed structural consultants can assess the site and provide a tailored solution using our advanced resin injection method.
What Causes Unlevel Structures and the Need To Relevel A House?
When soil beneath your foundations begins to subside, shift or settle, it can cause part of your home to sink or tilt. This uneven movement creates structural imbalances that often require house levelling (or house relevelling) to restore stability. The resulting unlevel floors and foundations of your home can be caused by a number of factors:
- Excess water and flooding – an overabundance of water in the soil, whether caused by flood activity, heavy rain or poor drainage, will significantly increase its moisture levels. The soil can become almost liquefied, causing it to destabilise and shift, potentially resulting in subsidence.
- Erosion – the erosion of underground soil as a result of leaking sewer pipes or main water supply can lead to the soil subsiding beneath the foundations of your home.
- Extreme weather – whether it’s an earthquake causing major shifting in the soil, prolonged drought resulting in the soil drying out and cracking, or flood activity bringing too much moisture, the simple fact is that extreme weather can cause changes to the soil that result in subsidence.
- Soil types – the composition of the soil can also have an effect on its susceptibility to subsidence. Reactive clay, for example, will expand when it takes on a lot of moisture and contract when it dries out. Soils rich in sand and silt can be subject to erosion, as the smaller granules are swept or washed away leaving the larger particles to settle.
- Tree roots – if you have any large trees on your property or significant volumes of vegetation, the roots beneath the ground’s surface will draw the moisture out of the soil. This causes the soil to crack and subside.
- Foundation footings – if the footings used in the construction of your home are not compatible with or suitable for the ground beneath it, subsidence might occur.
- Construction – nearby construction projects can cause vibrations which may result in a destabilisation of the soil.
If any of these are a potential cause of subsidence that has led to you needing a house releveling professional, it’s time to get in touch with Resinject.
What Are The Signs Of Unlevel Structures?
Unlevel structures such as a sinking house are something that need urgent attention. They can be highly unstable and therefore potentially hazardous, especially if part of the structure collapses under its own weight. There are numerous signs that your home has become unlevel and that you need an expert in house levelling to restore its evenness. Among the most common signs to look out for are:

Cracked walls

Sunken or sinking foundations

Sunken or sinking concrete

Jammed doors and windows

Holes and voids

Unlevel structures
How To Fix Unlevel Structures or Relevel A House
If your home has become unlevel, if you find yourself unable to open or close doors and windows properly, you notice cracks in the walls, or find the floor suddenly sinking in a particular direction, you will need to have your house releveled as possible. Delaying the process may see the problem get worse – and that could be gradual or sudden. Your property can become increasingly unstable and potentially collapse. This can also have a negative impact on the value of your property as well.
Resinject knows how to relevel a house. We offer a smart and sustainable solution that brings stability and structural integrity back to your home.
One of our structural consultants will come to your property and assess the damage. They will determine the cause of the subsidence and provide a no obligation free quote to inject our RSJ170 resin into the impacted areas of the soil. This non-toxic resin will expand throughout the soil, filling in the gaps that cause the sinking. It provides added strength to the soil and restores the necessary balance and evenness to your foundations.
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Recent Unlevel Structure Repairs we have completed
Benefits of Resinject RSJ170 Resin Injection
Resinject’s RSJ170 resin is an Australian made, non-toxic product that offers a wealth of house releveling benefits.
- Resin injections are more cost-effective than traditional underpinning practices
- It’s a non-invasive process with no major excavation and minimal disruption to your property
- The process is relatively quick, often taking less than a day to complete
- The resin fills in any gaps in the ground as it expands and compresses the founding soil, all while strengthening the ground
- It repairs cracks in the walls by repairing the ground problems that caused them
- Aids in the releveling of your house or business premises
The process is backed by a 50 year warranty for your complete peace of mind.
See what some of our recent clients had to say!

I have cracks everywhere, Resinject lifted and levelled all the cracks. Great experience…
Laura E

Huge shout out to Richard and the team, they were professional and skilful. My floor is looking great…
Melissa B

As a Strata Manager I can confirm Resinject are a brilliant company to work with. Takes the stress out of managing properties…
Jan B

It is now more than two months since Resinject stabilised the foundations of my old house and I couldn’t be happier with the results…
Carolyn S

Resinject level several floors in a few warehouses I own. They are a great company to work with…
Brett P

My experience with these guys has been nothing but first class. From my initial inquiry through to getting the job done…
Graham C
Here’s why you should choose Resinject to repair your Revetment Wall
Combined 100+ Years Experience
50 Year Product Warranty
Licenced
Builders
Certified Australian Resin
ISO Certified 9001, 14001, 45001
Here’s how our house levelling repair 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
Frequently Asked Questions
Leaving an unstable structure untreated can lead to further damage. Early assessment and treatment can reduce long-term repair costs and help prevent structural issues from worsening.
Most residential jobs are finished within a few hours. Larger or more complex projects may take over a day. Your Structural Consultant will confirm the timeframe during the free site assessment.
Only a licensed builder has the expertise to assess how a structure will respond to ground consolidation and stabilisation. Their knowledge ensures the most appropriate solution is recommended for your home.
Resinject offers a 50-year product warranty against shrinkage. Our Australian-engineered RSJ170 structural resin is supported by over 100 years of combined team experience and can be injected to depths of up to 6.5 metres where required.
Injection depth depends on the site conditions and may be informed by geotechnical reports. Our team injects resin at varying depths, typically between 800mm and 6.5 metres, to ensure proper consolidation and long-term stability.
If utility services are close to injection points, some small areas may need to be cleared for visual inspection. Otherwise, only small access holes are drilled and sealed with non-shrink grout on completion.
There’s no cut and dry answer to the question of how much it costs to relevel a house, as each job is different. Factors like property size, site access, soil condition and the extent of the damage will all influence the final price. A Resinject Structural Consultant will assess your site and provide a detailed, obligation-free quote tailored to your home.
Most house releveling jobs are completed in just a few hours. Timeframes vary depending on site complexity and will be discussed during your assessment.
Resinject re-levels structures by injecting RSJ170 structural resin into the affected ground. The resin expands to fill voids and compact the soil, lifting and stabilising the foundations without excavation.
In most cases, house releveling is not covered by home insurance policies, as it’s considered a preventative solution rather than repair of existing damage. It’s best to check directly with your provider.