Have you noticed sunken or cracked slabs?
When you notice cracked concrete slabs or slabs that are “pumping” and uneven, you may have compromised sub soils. Let the experts at Resinject assess, scope the works and re-level your slabs and prevent future damage by stabilising your soil.
What causes sunken and/or cracked concrete?
The ground beneath your concrete slabs, flooring or foundation is affected by a variety of factors that can cause changes and movement called subsidence. This can be due to water washouts, reactive clay soils and damage from surrounding vegetation. As the unstable ground sinks and moves, it will cause the concrete above it to crack, slump, pump and tilt.
What are the signs of a cracked or sunken concrete slab?
Subsidence underneath your concrete can be quite obvious. At residential properties, it most commonly presents as a sunken driveway, and at commercial/industrial sites, it can cause cracked, uneven and sunken concrete slab flooring.
You may be at risk if you’ve noticed concrete flooring or concrete slabs that:
- Appear sunken – unevenly raised or depressed
- Have cracked
- Appear tilted or become slanted when you walk over them
- Show movement between them and other fixed structures, like railings or walls
- Are very noisy (clunking) should you have forklifts traversing slabs
- Have water squish from under the slabs when traversed by vehicles
- Feature obvious trip hazards between slabs
- Subside, resulting in cracked walls and sticking doors and windows
- Show visible voids under the slab
If you notice signs of sunken or cracked foundations, your property may be at risk of subsidence. Not only does this compromise the integrity property, but it can also represent a significant trip and safety hazard to personnel as well as potential expenses on machinery maintenance. Contact Resinject for quick and accurate concrete slab crack repair, wall repair or foundation repair quote.
Is your site at risk?
Industrial and commercial sites can be established on compromised sub soils such as fill, reactive clays and sandy soils that have not been compacted sufficiently or have been compromised for one reason or another, be it washouts, drainage, or plumbing.
Fixing a cracked concrete slab
At Resinject, we inject our resin, fixing the cracked concrete slab by void filling the affected area and increasing the load-bearing capacity of the soil, which supports the affected slab. This can also be referred to as ‘slab jacking’ or ‘slab heave’. Our re-levelling process is also re-supporting of adjoining areas that could have been compromised due to the subsidence. Once re-supported, we then “stitch” the slabs together. We can also install piers in necessary situations.
Our service
We provide a high-quality service, a high-quality product and the best value for money. We pride ourselves on being an industry leader and utilising resin that is 100% designed and made in Australia. With Resinject, you can be assured that sunken concrete will not trouble you in the future, so contact us for a free assessment today.
Recent Sunken & Cracked Concrete Repairs we have completed
A long-term repair for sinking or concrete slab cracks
Looking to fix your cracked concrete slab foundation? At Resinject, we are not about quick fixes. We provide our customers with long-term peace of mind by ensuring that we treat the principal cause of the problem: subsidence. We work with a high-quality resin to stabilise and consolidate the ground under your concrete slab and flooring. Our resin is not only certified to the highest Australian standards, but also comes with a 50-year warranty.
See what some of our recent clients had to say!
I had three quotes for a major slab extension job. Resinject was by far the most comprehensive and detailed in scope. Everything from start to finish was excellent…
Laura M
I highly recommend Resinject. They were the only company who wanted to take on our “difficult sunken concrete” job, without hesitation. These guys know their stuff…
Darren A
Resinject has done a few jobs for my company, the most recent a property with a sunken garage. Again, I was impressed. Every time I will choose Resinject…
Craig H
Great job from Adam and the team, I was really impressed. Pick Resinject every time…
Chris L
It was a pleasure to deal with Resinject when needing to raise a large concrete slab at our home. They were thoroughly professional and used state-of-the-art equipment…
Richard S
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 sunken and cracked concrete
Combined 100+ Years Experience
50 Year Product Warranty
Licenced Builders
Certified Australian Resin
ISO Certified 9001, 14001, 45001
Here’s how our sunken and cracked concrete repair process works
By injecting our resins, compromised soils will be consolidated and stabilised. 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 and hardens instantly, which compacts the ground
Result
The area is instantly reinforced and even re-levelled if required
Risks of ignoring the problem
Ignoring a sunken concrete slab can lead to a range of serious risks that only worsen over time. Uneven surfaces pose safety hazards, increasing the likelihood of trips or accidents, especially in areas where machinery is used. Beyond safety, the issue can signal progressive damage to the foundation. Delaying repairs often results in higher long-term costs, as what might have been a straightforward fix can evolve into a major project.
Frequently Asked Questions
In order for us to carry out the works, it is ideal for you to have all your services located. Please ensure that you have this on hand when we arrive. i.e., water, gas, sewers, storm water drains, phone lines, TV cables and irrigation piping.
Our resins cure in minutes, providing fast and easy sunken concrete slab repair. Once the injection is completed, no further chemical reaction will take place. Driveways and factory floors can be used immediately after the cleanup.
Leaving an unstable structure can cause further issues. Having an early assessment/treatment will save further costs and lessen further damage from occurring.
With over 100 years of combined experience, Resinject exclusively uses an Australian-engineered resin that can be injected to depths of up to 6.5 meters when needed, ensuring proper re-support is installed. We do offer a 50-year guarantee against shrinkage with our product.
Traditional underpinning can be carried out as an alternate method. However, this generally requires a lot more time on site, bigger equipment, with more disruptions and ultimately more expensive.
Our generator has been enclosed in a custom-designed cabinet to minimise noise levels, so it is relatively quiet. Drilling may be noisy, but this is completed quickly, and when drilling indoors, we capture the dust with vacuum cleaners and small amounts of water.
The best method depends on the severity and cause of the crack. Resin injection is a highly effective solution that stabilises the ground beneath the slab.
Yes. Resin injection is designed to both lift sunken slabs and fill underlying voids, while also stabilising cracks caused by ground movement. The resin expands beneath the slab, restoring its original level and providing long-term structural support.
If the slab is structurally sound and the damage is due to subsidence or minor cracking, sunken concrete slab repair via resin injection is typically sufficient. A qualified technician can evaluate your situation and recommend the most cost-effective solution.
When performed correctly, fixing a cracked concrete slab via resin injection will enhance the structural integrity of your property. By stabilising the ground and restoring the slab’s level, this method helps prevent further movement and stress on the building’s structure.
Yes. The resins used in modern injection methods are non-toxic, inert and environmentally safe once cured. They do not leach chemicals into the soil or groundwater and are designed to be long-lasting without compromising surrounding ecosystems.
Resin injection is generally more cost-effective for concrete slab crack repair than full slab replacement. It involves less labour, minimal demolition, and faster completion times, which means lower overall costs and less disruption to your property.
Yes. Resin injection is highly effective in wet, reactive, or clay-heavy soils. The resin expands and hardens quickly, even in moist environments, creating a solid and stable foundation beneath the slab.
The most commonly affected areas to notice a sunken concrete slab include driveways, garage floors, patios and outdoor entertaining areas, footpaths and walkways, interior floors (especially near bathrooms or kitchens) and pool surrounds and garden paths.
