FREE QUOTE CALL OR TEXT
0424 408 330
No Call Out Fee Conditions apply*
GET YOUR JOB BOOKED IN AND FINISHED TODAY !!
Concrete Crack Repairs Sydney
Our specialist Dust-Free concrete crack repairs team has been trained, licensed, insured, and equipped with all the Personal Protective Equipment (PPE) and the most high-end, latest-model, diamond drills, concrete grinders, and dust extractors from the most well-known brands to get the job done safer, faster and more efficiently than our competitors while still maintaining a better price!
At Carpet Removal Sydney, we use high-powered commercial dust extractors connected directly to our commercial concrete grinders, as well as a dust extraction system connected to our diamond drills and concrete grinders, to achieve the highest quality results for our clients while repairing cracks in concrete, maintaining a virtually Dust-Free environment*
We are Australia’s #1 Concrete Crack Repair company. We provide more information for our clients than any other website in the world regarding this subject. This page has EVERYTHING you need to know. We also have links to blog posts for further information.
We Will Beat All Of Our Competitor’s Quotes By Up To 10%*
We Will NEVER… EVER Be Beaten On Price At Concrete Crack Repairs Sydney
We Also Offer Massive Discounts Off Our Normal Advertised Prices If You Have A Large Job!|
How Much Does Concrete Crack Repair Cost?
Price Varies Depending On A Large Range Of Factors
How Much Does Concrete Crack Repair Cost? Concrete Crack Repair costs vary quite a lot from company to company or private contractor to private contractor. Here at Concrete Crack Repair Sydney, we guarantee that we will always be upfront with pricing, with no hidden extras. Concrete Crack Repair Costs are based on a large range of factors.
These are the factors that we take into account when quoting:
– The Depth of the Crack that we are Filling
– The Length of the Crack that we are Filling
– What Product is being used to repair the Crack
– How many metres require Concrete Crack Repair
– Access to the site (LIFT or STAIRS? and what LEVEL?)
– The condition of the Concrete that requires Concrete Crack Repair
– What level of power can be provided? (10AMP > 15AMP OR 3PHASE)
– What service is required (Concrete Crack Repair? or Concrete Crack Repair and Concrete Grinding?)
How Do I Stop My Concrete Cracking?
Quality
Concrete is defined as a mixture of sand, aggregate, and water. Aggregate is a composite of gravel, crushed stone, synthetic materials, slag, and other recycled substances. The quality of concrete has to do with the ratio of sand to aggregate and water. Too much or too little of either of these substances will result in poor-quality concrete. Concrete is mixed together with lime-based cement to form a malleable putty so that it can be worked into any shape. To enhance the durability of the concrete, additives can be thrown into the mixture before it is poured to make it more flexible and reduce its chances of cracking.
Curing
Curing is the period during which concrete obtains its strength and durability. 90% of concrete’s strength is acquired during the first four weeks after it is poured. The three factors which affect this process are hydration, temperature, and humidity. To ensure full hydration during curing, concrete slabs are usually sprayed with a hydrophobic wax film to keep moisture in. More traditional techniques involve spraying the concrete with water and wrapping it with plastic to get a similar effect.
Rebar Corrosion
The remaining 10% of the concrete’s strength is achieved over the years or even decades. The absorption of carbon dioxide strengthens the concrete and makes it more resistant to damage, however, it also becomes more acidic which can corrode steel reinforcement bars; otherwise known as rebar corrosion, Concrete Spalling & Concrete Cancer. The steel will expand while it is corroding which can cause the concrete to crack under pressure.
Reinforced Concrete
The most common form of concrete is ‘reinforced concrete’ which contains a steel framework or mesh. Concrete has a relatively high compressive strength but a significantly lower tensile strength. In other words, it is weaker when stretched out and stronger when compact. Steel, on the other hand, has a high tensile strength which compensates for concrete’s lack of tensile strength. Steel rebar, therefore, allows concrete to be stretched out in thinner layers. It is better for reinforced concrete to crack when stretched out rather than compressed because the steel reinforcement will hold it together, for example on a bridge.
Different Types Of Concrete Cracks
CHEMICAL:
Over a long period of time, concrete will absorb carbon dioxide from the air, which causes a chemical reaction with lime in the cement, yielding more acidic concrete. This causes the steel reinforcement bars to rust and expand, the force of which will eventually crack the concrete. It can be tested using a pH indicator.
CHLORIDES:
Chlorides shorten the setting time of concrete; however, they leach calcium hydroxide, leading to a loss of strength, which in turn affects the durability of the concrete, leading to early failure.
SULFATES:
Examples include ‘acid rain’ and ‘crown rot corrosion’ in sewers.
LEACHING:
When water flows through the cracks in concrete, it dissolves minerals and carries them to other places, forming lumps at the outer surface.
DECALCIFICATION:
The leaching of calcium hydroxide from concrete cracks can facilitate the growth of ‘calthemites’, which mimic the appearance of stalactites in caves.
ENVIRONMENTAL:
Seawater & wind, Concrete exposed to seawater is more susceptible to corrosion and erosion. Wind also plays a role in erosion.
BACTERIAL:
Bacteria themselves do not have a noticeable effect on concrete; however, they do play a role in ‘crown rot corrosion’ in untreated sewer waters.
PHYSICAL:
Earthquakes, tremors, and other sources of vibration are likely to impact the structural integrity of the concrete.
THERMAL:
Fire will expose the concrete to gases, acids, salts, and liquids that can be damaging.
RADIATION:
Exposure to neutrons, gamma radiation, and high-flux material testing reactors in nuclear power plants and other radiation zones can cause concrete to become unstable.
Structural vs Cosmetic Cracks — What’s The Difference?
Not all concrete cracks are the same. Some are harmless and merely affect appearance, while others indicate deeper structural issues that require urgent professional repair. Understanding the difference can help prevent long-term damage and costly future repairs.
Cosmetic Cracks (Non-Structural Cracks)
Cosmetic cracks are surface-level imperfections that do not affect the strength or stability of the concrete.
Typical Characteristics:
– Thin, hairline cracks
– Usually shallow and do not extend deep into the slab
– Often caused by shrinkage, minor settlement, or temperature changes
– Common in garage floors, driveways, pathways, patios, and older slabs
Are They Dangerous?
On their own, cosmetic cracks are not structurally dangerous. However, if left untreated, they can worsen over time and allow water, moisture, or chemicals to penetrate the concrete—eventually leading to spalling, deterioration, or even concrete cancer.
Recommended Repair:
– Epoxy filling
– Polyurethane crack sealants
– Surface grinding and patching
Structural Cracks (Serious Cracks Requiring Immediate Attention)
Structural cracks are deeper, wider, and indicate movement, stress, or failure within the concrete or supporting structure.
Typical Characteristics:
– Wide cracks (often >2mm)
– Cracks that change in width or continue to grow
– Cracks that run through the entire depth of the concrete
– Rust-coloured staining (possible sign of concrete cancer)
– Vertical displacement between one side of the crack and the other
– Cracks found in load-bearing walls, columns, beams, balconies, or slabs
What Causes Structural Cracks?
– Foundation movement or subsidence
– Poor construction or inadequate reinforcement
– Water ingress leading to rusting rebar (concrete cancer)
– Heavy loads or structural failure
– Soil movement, tree roots, expansion/contraction cycles
Are They Dangerous?
Yes, structural cracks can compromise the strength and safety of the building. They often indicate underlying problems that must be assessed and repaired immediately by trained professionals.
Recommended Repair:
– Concrete spalling repairs
– Waterproofing restoration
– Structural bonding and sealing
– Crack injection (epoxy or polyurethane)
– Reinforcement repair (if steel corrosion is present)
How We Diagnose The Severity Of A Crack
Our team uses:
– Depth gauges
– Moisture meters
– Hammer-sound testing
– Thermal imaging (if required)
– Visual structural assessment
This ensures we determine exactly what type of crack you’re dealing with—and the most effective repair method.
What Is A Epoxy Crack Injection?
Epoxy crack injection resin can mitigate problems of cracked concrete with larger and finer cracks. The ARDEX Epoxy Injections used to repair cracks in concrete use a high-strength, rapid-setting two-part system to repair concrete damage from hairline cracks right through to structural repairs.
These products are ideal for repairing holes, spalls, and cracks in concrete, as well as in internal and external situations where heavy-duty vehicle traffic is anticipated. Once cured, the repaired area will be two to three times stronger than the original concrete, guaranteeing a long-lasting and durable concrete crack repair solution.
Epoxy injection is a process by which the structural integrity of a cracked concrete member can be restored to its original strength. Epoxy is pumped into a crack under pressure. The injection is performed to ensure that the epoxy fully penetrates and fills the crack. Once the epoxy has cured, the concrete is, in essence, welded back together.
Epoxy has a cured strength many times higher than the concrete itself, restoring injected members to their original strength. Any known cause for the cracking or settlement of the structure should be addressed to mitigate any future movement.
Epoxy injection is an extremely cost-effective alternative to the removal and replacement of cracked concrete and can be executed with minimal disturbance.
1) The epoxy injection method can be used to repair concrete cracks based on their width, length, and depth. The procedure used to inject epoxy into the cracks may vary depending on the location and direction of the cracks.
2) Epoxy injection is an economical method of repairing non-moving cracks in concrete walls, slabs, columns, and piers and is capable of restoring the concrete to its pre-cracked strength. Prior to doing any injection, it is necessary to determine the cause of the crack.
3) Epoxy Crack Injection Resin can mitigate problems of cracked concrete with larger and fine cracks. ACI specifies crack widths that are acceptable in structures under defined conditions. ACI 224R-012 provides a guideline for crack widths for reinforced concrete under service loads for new construction.
What Areas In Sydney & NSW Do We Service?
Here at Carpet Removal Sydney, we service a large range of areas, including:
– Lower North Shore
– North West & Ryde
– Upper North Shore
– St George
– The Hills Shire
– Inner West
– Northern Beaches
– Eastern Suburbs
– Northern Sydney
– South West Sydney
– Sutherland Shire
– Greater Western Sydney
– Sydney CBD
– Sydney
– Newcastle
– Wollongong
We can take on any job at any time. No matter how big the job is, we’ll take it on!
Click Here To Learn More About The Areas In Sydney & NSW That We Service
FREE QUOTE CALL OR TEXT 0424 408 330
We’ll Beat All Quotes By Up To 10%*, No Call Out Fee Conditions apply*
GET YOUR JOB BOOKED IN AND FINISHED TODAY !!
FREE PRICE BEAT GUARANTEE
QUOTE
We’ll Beat ALL Quotes By Up To 10%
Conditions apply. *Cannot be used in conjunction with any other offer.
Concrete Crack Repairs
Concrete Crack Repairs
Concrete Crack Repairs Service In Sydney
Our concrete crack repairs team has completed thousands of jobs throughout Sydney. Here at Carpet Removal Sydney, we have perfected the strategy of clean, fast, affordable, and efficient Dust-Free concrete crack repairs.
Most jobs take us less than a day, leaving you to get on with the rest of your project. Our staff are experienced and professional Dust-Free concrete crack repair specialists, and they know exactly how to tackle the job safely and quickly.
Our team prides itself on its customer service, its ability to get the job done when other companies can’t, and on getting the result that the customer is always happy with.
– We are a fully insured business with worker’s compensation, insured for public liability, and all employees have white cards as well as police background checks.
– Our highly trained staff will always work in a safe and efficient manner while using high-quality Personal Protective Equipment (PPE) and Dust Extraction Equipment.
Why Choose Carpet Removal Sydney For Your Concrete Crack Repair Needs?
At Carpet Removal Sydney, we take pride in being Sydney’s trusted specialists for fast, reliable, and affordable concrete crack repair services. Here’s why homeowners, strata managers, builders, and renovators across NSW continue to choose our expert team:
Dust-Free Technology:
We use advanced dust-extraction systems and vacuum-assisted drilling and grinding equipment to capture concrete dust directly at the source. This dramatically reduces airborne particles, protects indoor air quality, and keeps your property cleaner throughout the repair process.
Over 35+ Years of Experience:
With decades of hands-on experience, our concrete specialists understand every type of cracking—from minor cosmetic surface cracks to deep structural cracks caused by concrete cancer, movement, moisture, or age. We repair each safely and professionally to restore strength, stability, and long-term performance.
Fully Licensed and Insured:
Carpet Removal Sydney operates with full licensing and industry insurance, ensuring every concrete repair project is completed safely, professionally, and in compliance with Australian building regulations and structural requirements.
Complete Concrete Repair Services:
We provide more than just crack repairs. Our team also performs Concrete Grinding, concrete cancer repairs, concrete spalling repairs, patching, waterproofing membrane installation, and re-surfacing—ensuring your concrete surface is safely restored and ready for long-term use.
Competitive Rates + Price Beat Guarantee:
We believe in delivering outstanding value without compromising quality. If you receive a written quote from another contractor, we’ll beat it by up to 10%, ensuring you get premium workmanship at the best price available in Sydney.
Focus On Customer Satisfaction:
We maintain clear communication, respect your property, and ensure every repair is completed on time, on budget, and to a high professional standard—guaranteeing lasting results and peace of mind.
Advanced Tools & Equipment:
We use industrial-grade crack injection systems, diamond grinders, moisture-control materials, and concrete repair tools designed to minimise disruption and deliver a professional finish that blends seamlessly with existing concrete.
Customised Concrete Crack Repair Solutions:
Every crack is different. That’s why we tailor our repair process to suit the type of cracking, depth, width, cause, underlying concrete condition, and long-term structural requirements—ensuring the best possible outcome for your property.
Our Concrete Crack Repair Process
At Carpet Removal Sydney, we follow a proven and highly effective concrete crack repair process that restores strength, durability, and safety to your concrete surfaces. Every stage is carried out with precision and care to ensure long-lasting results and minimal disruption to your property.
Initial Assessment:
Our specialists begin with a comprehensive inspection of the affected concrete area. We assess the type of crack, depth, width, underlying cause, moisture levels, and any signs of structural movement or concrete cancer. This allows us to determine the most appropriate repair method and identify any issues that require urgent attention.
Property Protection & Preparation:
We take every precaution to safeguard surrounding surfaces, fixtures, and finishes. The repair area is cleaned, dried, and prepared using dust-controlled drilling and grinding and removal tools. This ensures that loose material, contaminants, or weak concrete is removed before repairs begin, allowing for maximum bonding strength.
Crack Repair & Treatment:
Using specialised concrete repair equipment and professional-grade materials, our team repairs the cracks based on their severity and structure:
Cosmetic Cracks are sealed with flexible polyurethane or epoxy fillers.
Structural Cracks may require deep crack injection, stitching, reinforcement exposure, or rebuilding of damaged sections.
Cracks caused by Concrete Cancer involve removing damaged concrete, treating rusting rebar, and applying high-strength repair mortars.
Each crack is repaired using methods designed to restore strength, prevent future movement, and stop water or moisture from entering the slab.
Surface Restoration:
After repairing the cracks, the surface is smoothed, patched, and levelled as needed. This ensures the area is ready for new flooring, waterproofing, coatings, or long-term exposure to external elements.
Final Cleanup and Quality Inspection:
Once repairs are complete, our team performs a detailed cleanup and final inspection to ensure all cracks have been properly treated and the surface meets our high professional standards. You are left with durable, restored concrete that is ready for use or further renovation.
What Are The Different Methods Used To Repair Cracked Concrete?
Concrete cracks can develop for many reasons—age, movement, moisture, poor installation, heavy loads, or structural failure. Each type of crack requires a different repair method to restore strength, prevent further damage, and ensure long-term durability. The repair technique selected depends on the severity, depth, width, and underlying cause of the crack.
Below are the most common methods used to repair cracked concrete throughout Sydney:
Routing & Sealing:
– Commonly used for non-structural or surface-level cracking.
– The crack is widened slightly (“routed”) and then filled with a flexible sealant.
– This prevents moisture penetration, protects against further expansion, and improves surface appearance.
Slab Stabilisation / Underpinning:
– Used when cracks are caused by ground movement or subsidence.
– The slab is stabilised or re-supported using underpinning, grout injection, or compaction methods.
– Stops the crack from spreading and prevents future structural damage.
Spalling & Concrete Cancer Repair:
– Used when cracks are caused by rusting reinforcement (rebar corrosion).
– Involves cutting out damaged concrete, cleaning or replacing corroded steel, applying anti-corrosion treatments, and reinstating the area with specialist repair mortar.
– Prevents the crack from worsening and restores structural integrity.
Crack Injection – Epoxy or Polyurethane:
– Epoxy injection is used for structural cracks to restore the original strength of the concrete.
– Polyurethane injection is used for cracks that require flexibility or waterproofing.
– This method seals deep cracks and prevents water ingress, movement, and future deterioration.
Concrete Patch Repair / Mortar Reinstatement:
– Damaged or deteriorated sections of concrete are removed and replaced with high-strength repair mortar.
– Ideal for cracks caused by impact damage, surface wear, or localised deterioration.
– Ensures a smooth, durable, and long-lasting finish.
Is Our Concrete Crack Repair Service In Sydney Really Dust-Free?
Yes, we provide a Dust-Free concrete crack repair service. We utilise powerful dust extractors and vacuum-equipped tools, connected to our drills and grinders, to capture debris at the source, significantly reducing or even eliminating dust in the air compared to traditional methods.
Is Concrete Grinding Required After Concrete Crack Repairs?
Yes, concrete grinding is often required after concrete crack repairs to ensure the surface is smooth, level, and ready for any new flooring or coating system. Once a crack has been injected, filled, or patched, the repaired area may sit slightly uneven compared to the surrounding concrete. Grinding removes excess epoxy, filler, or repair mortar and blends the repaired section seamlessly into the slab.
Concrete Grinding is especially important if you plan to install tiles, vinyl, epoxy coatings, polished concrete, or a floor-levelling compound. A properly ground surface improves adhesion, durability, and helps prevent future flooring failures. It ensures your repaired concrete slab is clean, even, and fully prepared for the next stage of your project.
How Long Do Concrete Crack Repairs Take?
The duration of concrete crack repairs varies depending on the type of crack, its severity, the repair method required, and the overall condition of the slab. Most small to medium repairs can be completed within a few hours, while larger or more complex repairs may take one to several days. Projects involving structural cracking, concrete cancer, moisture issues, or large surface areas may require additional time for curing and reinforcement work.
Smaller residential cracks—such as hairline or shrinkage cracks—are usually completed the same day. Larger commercial slabs, deep cracks, or areas showing signs of concrete spalling typically require longer due to preparation, repair materials, and curing times.
The Total Removal Time Depends On:
Size & Length of the Crack:
Larger cracks or multiple cracking areas require more preparation, filling, and finishing.
Type of Crack:
Structural cracks, concrete cancer, and wide or deep cracks take significantly longer to repair than small non-structural cracks.
Slab Condition:
Moisture issues, damaged concrete, loose material, or exposed reinforcement increase repair time.
Access & Obstructions:
Furniture, tight spaces, machinery, or multi-level access can slow down the process.
Curing Time:
Many repair systems—such as epoxy injection or high-strength repair mortars—require specific curing periods before grinding, coating, or using the surface.
At Carpet Removal Sydney, our concrete repair specialists use industry-leading equipment and proven repair methods to complete concrete crack repairs safely, efficiently, and with minimal disruption—leaving your surface strong, stable, and ready for long-term use.
Ready For A Concrete Crack Repair Quote?
Ready to start your project? Contact Carpet Removal Sydney today for a free, no-obligation quote.
We offer Sydney-wide concrete crack repair service, expert advice, and fast turnarounds — From small home residential jobs to STRATA, Government and Complex Industrial projects, we do it all!
CALL US NOW 0424 408 330
Or fill out our Online Contact Form, and we’ll get back to you within 24 hours or less
✔ We beat competitor quotes by up to 10%
✔ Dust-Free guaranteed
✔ Over 200+ positive reviews
✔ Fully insured and compliant
Don’t risk your health, your floors, or your time — trust Sydney’s concrete crack repair experts.
DO YOU NEED HELP WITH A SERVICE?
Fill out the form and our team will contact you!
Our Difference
- Free Quote & Measure For Every Job!
- Combine Multiple Services To Save Money!
- There Is A On-Site Supervisor On Every Job!
- Over 200+ Flawless Reviews & Testimonials!
- Proudly 100% Australian Owned & Operated!
- 100% Licensed & Insured Flooring Specialists!
- Fully Qualified & In-House Trained Specialists!
- 24/7 – 365 Service Available At No Extra Charge!
- We Use Dust Extraction Equipment Free Of Charge!
FREE QUOTE CALL OR TEXT
0424 408 330
No Call Out Fee Conditions apply*
GET YOUR JOB BOOKED IN AND FINISHED TODAY !!
