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Solving Subsidence

Raise & Stabilise your Foundation Permanently!

Stabilising your home’s foundation is simple with Buildfix’s advanced subsidence solution.

What are the symptoms of Subsidence
that I should be looking out for?

Wall Cracks

Sometimes wall cracks are purely cosmetic. Other times, the cracks indicate structural issues brought on by your house sinking. If your wall cracks appear stepped, appear in both the internal and external walls of your house as well as the corners of walls, your house may be sinking.

Ceiling and Cornice Cracks

Just like wall cracks, ceiling cracks can be superficial but can also indicate deeper structural problems due to the sinking of your home. The sinking places pressure upon the entire house starting in the foundations. This travels up walls into your cornices and ceiling, causing them to crack.

Doors & Windows Jamming

If you can’t close or open your doors and windows without them jamming, there’s a likelihood the foundation of your home has sunk, unevenly. What was initially level isn’t anymore. It’s this lack of balance in the structure’s foundation that causes doors to hit the floor when you open them or has walls squeezing windows in so they can’t be opened or shut.

Leaning or Off-level Walls

The source of leaning or off-level walls is the same as jammed windows and doors. As your house sinks, the unevenness of your home’s foundations can cause walls to lean one way or another. Leaning or off-level walls are horribly dangerous if left unchecked and unfixed. They have the potential to fall over and cause injury or worse.

Sloping Floors

If you have sloping floors, the reason is, again, unevenness in the foundations of your home due to sinking. Your floors will slope as one side of the house sinks downwards more than the other. To double check for a sloping floor, just place a ball on the floor and see if it rolls away from you. If it does, it’s likely you’re in a sinking house.

Gaps between Walls & Floors

As the foundation underneath your home sinks, the floors pull away from the base of your interior walls, causing gaps to appear. The sinking of your home may also result in a floor that becomes bouncy as you walk upon it. This is likely caused by the ground pulling away from the upper parts of your home’s structure. This is dangerous because this indicates your floor’s support system is beginning to sag and weaken.

Why does it matter?

Subsidence can impact your home dramatically.

When a home suffers from subsidence, an immense amount of force is being exerted onto the structure. This force strains the footings, floors, walls, ceiling and even the roof.

If subsidence isn’t stopped, structural issues like wall cracks can multiply, making your home unsafe for occupancy.

Introducing GeoPoly™ A Game-Changer for Homeowners: The Non-Invasive Solution to Subsidence Issues

GeoPoly™ solves subsidence issues hassle-free; it’s like keyhole surgery for foundations. Unlike traditional underpinning, GeoPoly™ eliminates the need for disruptive excavations and costly construction work. It’s injected through small, coin-sized holes in the ground. Once injected, it expands into voids beneath the footings. This process has the potential to close cracks and even level walls.

GeoPoly™ can re-support your home’s foundation while instantly enhancing its appearance.

Need an underpinning solution? Book a FREE structural assessment today

Need an underpinning solution?
Book a FREE structural assessment today

Watch: GeoPoly™ transforms a sinking home in minutes!

The advantages of our GeoPoly™ solution

Raises Foundations

If your foundations are subsiding, GeoPoly™ can give them a lift. Cracks may even close, making your home look better instantly.

Non-Disruptive

GeoPoly™ is non-disruptive and is injected through small drill holes. You and your family can stay home while we work.

Time-Efficient

GeoPoly™ gets to work fast, meaning subsidence can be fixed in no time. Most jobs are completed in just one day.

20-Year Warranty

You get peace of mind. We guarantee your home’s subsidence won’t return, or we return at no cost to you.

Is your home suffering from subsidence?

Is your home suffering from subsidence?

Subsidence can impact your home dramatically. If you suspect your house is suffering subsidence, it’s worth having it looked at sooner than later.

We’re happy to take a look at your home for FREE.

Top-rated reviews from real homeowners

Don’t just take our work for it! Hear what our customers say.

Read genuine reviews on Google and Trustpilot to learn about the real experiences others have had with our services.

#1 Underpinning
Top-Rated in Australia!

386+ Reviews

ongoogle logoas of Feb 2025

Rated 4.9/5

736+ reviews on

6 Reasons why you should choose Buildfix

FREE structural assessment and honest advice

Buildfix structural engineers or consultants come to your home at no cost. Our assessments are thorough, uncovering your home’s issues and the best solutions.

UNLIMITED GeoPoly™️ for your job

After we’ve completed your quote, we don’t change it. We don’t add extra costs at the end. With us, there are no tricks, no games and zero surprises.

Permanent repair guaranteed

Using our advanced underpinning technology, GeoPoly™️, we can lift your foundations and solve your subsidence permanently. Everything we do is guaranteed to last.

Experience - thousands of projects completed

With well over 15000 projects completed, you'll get the most experienced and committed teams around. Your home is in expert hands with our proven track record.

Best price promise

With our leading techniques and technology, we work more accurately and more efficiently than anyone else. We promise the best price* on advanced underpinning technology, if not we'll beat lower offers by 5%.

*Must be like-for-like, covering the same area with unlimited GeoPoly™️, or similar material.

We cover locations throughout Australia

Our teams are ready to go where you live. Whether it be in Brisbane, Sydney, Canberra, Melbourne, Perth or anywhere else in between**, we’ll come out and do the job for you.

**Excludes some remote locations.

Discover our methods: watch how we transform homes

Need an underpinning solution? Book a FREE structural assessment today

Need an underpinning solution?
Book a FREE structural assessment today

About Buildfix

As Australia’s leading expert in structural repair, Buildfix provides non-disruptive, cost-effective solutions to homeowners across Queensland, New South Wales, and Victoria. Each month, we conduct hundreds of FREE structural assessments, resulting in thousands of successful repair projects for homeowners every year.

Our dedicated team includes qualified engineers, licensed builders and expert technicians, all focused on precision, safety, and the long-term stability of your home. With our advanced technology, extensive experience and collective skills, you can be confident that your home is in the most capable hands.

“Buildfix’s priority is getting best outcome for you, and your home.”

Frequently Asked Questions

Will the wall cracks be completely gone?
Buildfix aims to stabilise the soil beneath your foundation to stop further subsidence. In many instances, our geopolymer technology can even lift your foundation, allowing cracks to close and making doors and windows functional again.
Mostly, yes. However, the duration varies depending on the complexity of the repair, the area size, and the ground conditions. The majority of projects are completed within a 1-2 day timeframe.
Definitely, no. Buildfix primarily works externally, allowing you to continue your daily activities. Occasionally, we might need indoor access based on the project’s needs.
Buildfix has successfully completed over 15000 projects across Australia spanning the past decade. This includes residential projects across various states, along with commercial and government work.
Minimal disruption is one of our aims. We inject our geopolymer resin through small holes in the ground, akin to ‘keyhole surgery,’ minimising excavation and mess. You can continue with your regular home life while the work is being carried out.

Absolutely. We proudly offer an industry-leading, transferable 20-year warranty. This extensive coverage ensures your peace of mind for years to come and adds value to your property, even if you decide to sell it in the future.

Yes, our geopolymer resin is environmentally safe and poses no harm to the surroundings.
Our team of skilled technicians will handle all aspects of the work on your property.

Need a Subsidence Solution?

We’re happy to take a look at your home for FREE.

Need a Subsidence Solution?

We’re happy to take a look at your home for FREE.