Water ingress causing rising damp on concrete slab near sliding door entry.
Table of Contents​
Buildfix team ready for foundation repair and subsidence assessment onsite.

#1 Structural Repair Top-Rated in Australia

We’re happy to check your home for FREE.

Self-Levelling Compound: What It’s Used For

TL;DR: Self-levelling compound is ideal for smoothing minor floor dips before laying new flooring, but it doesn’t fix deeper problems like subsidence or soil instability. If a slope in your floor is caused by structural movement, the compound will just crack again over time. For a permanent, non-invasive solution, Buildfix recommends resin injection, which strengthens the ground beneath your floor and lifts it back into place—preventing future damage and saving on long-term renovation costs.

If you’re planning a renovation, self-levelling compound might seem like the perfect fix for uneven floors. After all, it’s widely recommended by builders and tilers for its quick application and smooth finish. But is it really the right solution for your home?

Before you go ahead with your renovation plans, it’s essential to ask yourself a key question: What’s causing the uneven floor in the first place? While self-levelling compound has its place, failing to address the underlying cause of sloping or uneven floors could turn your renovation into a costly mistake down the line.

Below, we explore what self-levelling compound is used for, its limitations, and why you might want to consider resin injection as a longer-lasting alternative.

What Is Self-Levelling Compound?

Self-levelling compound applied to an uneven concrete floor.

Self-levelling compound (also known as self-levelling cement) is a cement-based material designed to create a smooth, even surface over concrete or timber floors. It’s often used to prepare floors for new tiles, vinyl, or laminate flooring.

When Is Self-Levelling Compound Used?

  • Renovations: To create a flat surface before laying new flooring.
  • Minor Repairs: To fill small dips or low areas in floors.
  • Quick Fixes: When a fast, affordable solution is needed for levelling.

The application process is relatively simple: the compound is mixed and poured onto the floor, spreading out evenly to fill minor imperfections. Because it cures quickly, it’s a convenient choice for time-sensitive projects.

The Problem with Self-Levelling Compound

Cracked floor due to underlying structural issues.

While self-levelling compound seems like a simple fix, it’s important to understand its limitations. Homeowners are often told it’s the best way to level a floor, but this advice rarely considers what’s happening beneath the surface.

What Self-Levelling Compound Won’t Fix:

  • Structural Issues: If your uneven floor is caused by subsidence, soil instability, or foundation movement, self-levelling compound only masks the problem for the short term.
  • Ongoing Movement: Floors with underlying instability will continue to shift, moving and cracking the new surface over time.
  • Deep Slopes or Severe Unevenness: Self-levelling compound is best for superficial dips and is ineffective for correcting large-scale sloping.

The Cost of Getting It Wrong

Resin injection process stabilising a foundation.

Imagine investing in a full renovation—new flooring, fresh paint, new kitchen—only to discover cracks reappearing months later because the floor was never properly stabilised. Soon you’ll be resetting your brand new bench-tops and ripping up your freshly tiled floor just to get at the root cause. The repair costs for redoing your renovation like this can far exceed the cost of addressing the problem at its source before you start.

Why Resin Injection Is a Better Solution

Unlike self-levelling compound, resin injection doesn’t just cover up the symptoms—it tackles the root cause of uneven floors. At Buildfix, we specialise in this innovative method, which uses expanding geopolymer resin to stabilise and re-level your floors permanently.

How Resin Injection Works:

  • Assessment: Our experts identify the cause of your floor’s unevenness.
  • Injection: Small holes are drilled, and expanding resin is injected beneath the floor.
  • Stabilisation: The resin fills voids, strengthens the soil, and lifts the floor back to level.

Benefits of Choosing Resin Injection

  • Permanent Solution: Resin injection addresses subsidence, soil instability, and other root causes, ensuring your floors stay level permanently.
  • Non-Invasive: Unlike traditional methods that require ripping up floors, resin injection is quick and causes minimal disruption and damage to your home.
  • Cost-Effective: By fixing the underlying issue, you avoid the expense of repeated repairs or re-renovating your home.

Should You Still Use Self-Levelling Compound?

There are situations where a self-levelling compound may still be appropriate:

  • If your floor is only slightly uneven and shows no signs of deeper issues like subsidence or movement.
  • If you need a quick, temporary fix before addressing the root cause.

However, if you’ve noticed cracks in your walls, doors that don’t close properly, or significant slopes in your floors, it’s time to think deeper than a surface fix. In these cases, resin injection is the smarter, longer-lasting choice.

Don’t Renovate Without Knowing the Full Picture

Before you invest in a renovation, take the time to understand what’s causing your uneven floors. Self-levelling compound is a quick fix, but it could leave you facing even bigger problems down the road.

At Buildfix, we offer comprehensive assessments to determine the best solution for your home. Our resin injection technology ensures your floors are not only levelled, but also stabilised for years to come.

Fix Your Floors the Right Way with Buildfix

Before-and-after comparison of floor levelling with resin injection.

If you’re planning a renovation and want to ensure your floors are truly levelled and stabilised, we’re here to help. Contact Buildfix today for a professional assessment and discover how resin injection can save you time, money, and future headaches.

FAQs:

What is self-levelling compound used for?

Self-levelling compound is a cement-based material used to create a flat surface over minor imperfections in concrete or timber floors, typically before installing new flooring.

Can self-levelling compound fix structural floor issues?

No. It only covers the surface and won’t stop future problems caused by foundation movement, subsidence, or unstable soil. In these cases, cracks and unevenness are very likely to return after using self-levelling compound.

What happens if I use self-levelling compound over a moving floor?

The compound may crack, lift, or fail altogether. It doesn’t have the strength to fix structural issues. So, if the underlying issue isn’t addressed, the surface will continue to shift and compromise your renovation.

How is resin injection better than self-levelling compound?

Resin injection targets the root cause by filling voids beneath your floor and lifting it back into place. It stabilises the soil, relevels the floor, and provides a long-term fix as it addresses foundational issues in your home.

When is it okay to use self-levelling compound?

It’s a suitable quick fix for minor dips in stable floors. However, if your floor shows signs of movement or structural damage, resin injection or a full assessment is the smarter approach.

Help & Advice

A resource collection of articles, tips and advice

Brick wall with jagged cracks showing subsidence and need for foundation repair.
Wall cracks are common in Australian homes, but not all mean something's wrong. Some are harmless signs of natural...
Jagged ceiling and wall crack indicating subsidence and structural foundation damage.
Every home experiences settlement to some extent. But differential movement occurs when sections of a structure settle u...
Modern kitchen showing foundation repair after subsidence with concealed HelicalBar reinforcements.
Planning a home renovation is exciting. Whether you’re dreaming of a sleek new kitchen, a luxurious bathroom...
Water ingress causing rising damp on concrete slab near sliding door entry.
If you’re planning a renovation, self-levelling compound might seem like the perfect fix for uneven floors...
Scuffed baseboard with chipped paint indicating wall cracks and foundation movement.
A sloping floor is easy to dismiss—until it gets worse. What starts as a slight tilt can turn into misaligned walls, sti...
Close-up of brick wall seam highlighting mortar cracks and foundation repair needs.
A damp proof course (DPC) is your home’s first line of defense against rising damp, stopping moisture from creeping up t...
Water overshoots gutter, risking foundation subsidence and rising damp near patio.
Poor drainage around your home leads to water pooling, soil erosion, and foundation movement. Signs include mould,...
Large foundation wall crack indicating structural movement and potential subsidence issues.
Reactive clay soil is a significant concern for Australian homeowners, capable of causing major structural damage if pre...
Crawl space foundation repair with concrete piers, timber beams, and drainage pipes.
Traditional restumping is an invasive process to replace deteriorated sinking stumps in older homes. It can restore stab...
Hand peels wallpaper to reveal rising damp caused by subsidence Red cricket ball indicates possible foundation movement near overflowing gutter Man inspects under house for structural damage and wall cracks with flashlight.
Before buying a home, pay careful attention to the cosmetic touch-ups....
Example of Subsidence
You don't need to be a geological expert or structural engineer to understand what subsidence is...
guttering_feature_image
Guttering is designed to direct water away from your home and its foundations...

More Questions...

Look for signs like wall cracks, sloping floors, or sticking doors. If you’re concerned, we offer free structural assessments to identify the cause. We’ll provide honest advice and, if needed, a detailed repair plan with a fixed-price quote.

Our full-time technicians and trades professionals handle your project, overseen by our in-house licensed builders and structural engineers. We never outsource or subcontract, ensuring top-quality work from start to finish.

Our 20-year warranty covers materials and workmanship, plus unforeseen issues like flooding, soil erosion, or tree root damage—even if unrelated to our repairs. If problems arise at the repaired location, we’ll fix it at no cost.

Yes. GeoPoly™ is our proprietary product, developed and manufactured exclusively by Buildfix in Australia. We’re the only foundation repair company with rights to this formulation.

No need. We handle everything, including drainage inspections and blockage repairs. Our in-house plumbers ensure your underground services are protected, making the process seamless and hassle-free.

No. You only pay once the job is completed.

Not always. Fixing the foundation is crucial, but additional repairs may be needed for wall cracks or other issues. We offer over 30 specialised methods to fully restore your home.

We provide various structural repairs like wall crack repairs, concrete slab revelling, floor pier and stump repairs, and solutions for rising damp. We also offer cosmetic services like mortar repointing, plastering, and rendering.

We serve most major metropolitan areas and some regional locations across Australia, with hubs in Sydney, Melbourne, Brisbane, and Perth. Unsure if we cover your area? Call us at 1300 854 115.

More Questions...

Look for signs like wall cracks, sloping floors, or sticking doors. If you’re concerned, we offer free structural assessments to identify the cause. We’ll provide honest advice and, if needed, a detailed repair plan with a fixed-price quote.

Our full-time technicians and trades professionals handle your project, overseen by our in-house licensed builders and structural engineers. We never outsource or subcontract, ensuring top-quality work from start to finish.

Our 20-year warranty covers materials and workmanship, plus unforeseen issues like flooding, soil erosion, or tree root damage—even if unrelated to our repairs. If problems arise at the repaired location, we’ll fix it at no cost.

Yes. GeoPoly™ is our proprietary product, developed and manufactured exclusively by Buildfix in Australia. We’re the only foundation repair company with rights to this formulation.

No need. We handle everything, including drainage inspections and blockage repairs. Our in-house plumbers ensure your underground services are protected, making the process seamless and hassle-free.

No. You only pay once the job is completed.

Not always. Fixing the foundation is crucial, but additional repairs may be needed for wall cracks or other issues. We offer over 30 specialised methods to fully restore your home.

We provide various structural repairs like wall crack repairs, concrete slab revelling, floor pier and stump repairs, and solutions for rising damp. We also offer cosmetic services like mortar repointing, plastering, and rendering.

We serve most major metropolitan areas and some regional locations across Australia, with hubs in Sydney, Melbourne, Brisbane, and Perth. Unsure if we cover your area? Call us at 1300 854 115.

More Questions...

Look for signs like sagging or uneven floors, creaking boards, and difficulty opening doors. If you’re concerned, we offer free structural assessments to identify the cause. We’ll provide honest advice and, if needed, a detailed repair plan with a fixed-price quote.

Our full-time technicians and trades professionals handle your project, overseen by our in-house licensed builders and structural engineers. We never outsource or subcontract, ensuring top-quality work from start to finish.

Our 20-year warranty covers materials and workmanship, plus unforeseen issues like flooding, soil erosion, or tree root damage—even if unrelated to our repairs. If problems arise at the repaired location, we’ll fix it at no cost.

Yes. GeoPoly™ is our proprietary product, developed and manufactured exclusively by Buildfix in Australia. We’re the only foundation repair company with rights to this formulation.

No need. We handle everything, including drainage inspections and blockage repairs. Our in-house plumbers ensure your underground services are protected, making the process seamless and hassle-free.

No, you only pay once the job is completed.

Not always. Fixing sinking piers and stumps is crucial, but additional repairs may be needed for wall cracks or other issues. We offer over 30 specialised methods to fully restore your home.

We provide various structural repairs like wall crack repairs, slab re-levelling, subsidence repairs, and solutions for rising damp. We also offer cosmetic services like mortar repointing, plastering, and rendering.

We serve most major metropolitan areas and some regional locations across Australia, with hubs in Sydney, Melbourne, Brisbane, and Perth. Unsure if we cover your area? Call us at 1300 854 115.

More Questions...

How long will it take for my walls to dry after damp proof treatment?
We employ our damp proofing solution, DampBlock™, to counteract the effects of rising damp in your walls by blocking capillaries, reducing the walls ability to draw moisture upwards. After this process, the existing damp in your walls will generally take 6-12 months to dry out.
After the damp proofing process, your walls will start to dry. However, this can result in natural salt crystallisation and residual dampness on the surface. To prevent the surface plaster from deteriorating and the appearance of damp, an application of a salt-blocking solution is recommended, which we are happy to assist with and discuss during your assessment.
Certainly not. DampBlock™ is non-hazardous and completely odourless, allowing you and your family to stay at home while we work.
Buildfix has successfully completed well over 10,000 projects across Australia over the past decade. This includes mostly residential projects, as well as some commercial and strata buildings.
Absolutely. We proudly offer an industry-leading, transferable 20-year warranty on our products and workmanship, which 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 DampBlock™ is environmentally safe and poses no harm to the surroundings.
Yes, effective damp proofing can enhance the structural integrity of your property, prevent health hazards due to mould and ultimately improve the property’s market value and appeal to potential buyers.

More Questions...

How do I know if my home needs wall crack repairs?
If you’re noticing cracks in your walls, particularly near doors and windows, or if they’re growing over time, it’s likely you have a structural issue. Contact us for a free assessment and we’ll diagnose the problem.
No, not at all! Unlike traditional methods, our approach is non-invasive. We use HelicalBars™ and other advanced technologies to fix the cracks without any wall demolition.
The cost of repairing wall cracks depends on the severity of the damage. Most residential repairs range from $5k to $20k. We offer a free assessment and provide a fixed quote with no hidden fees.
In addition to wall crack repair, we provide subsidence repair, slab jacking, rising damp solutions, and more. We ensure your home is not only structurally sound but looks great too.
Absolutely! We back all of our wall crack repairs with a 20-year warranty.