Sydney Concrete Resurfacing & Strata Management Properties Guide

• Resurfacing concrete can add 15-25 years to the lifespan of strata concrete — this is a cost-effective solution for property managers in Sydney looking to save on maintenance costs.
• The owners corporation is responsible for repairing concrete on common property in NSW strata properties — however, it’s not always clear what constitutes common property and lot property, and mistakes can lead to expensive disputes.
• Concrete deteriorates faster in Sydney due to the city’s coastal humidity, UV exposure, and heavy rainfall — as a result, strata buildings here need to be inspected more frequently than those in drier climates.
• Not all concrete damage can be fixed with resurfacing — there’s a point at which replacement is the only option, and it’s important to recognize this early on to save time and money.
• Hiring an unlicensed contractor in NSW can result in your strata insurance being voided — it’s essential to meet licensing and insurance requirements, and there are important questions that every strata committee should ask before approving any work.

What You Need to Know About Concrete in Sydney Strata Properties

Concrete is more than just a surface in a strata property — it’s a structural and financial asset that impacts safety, compliance, and resale value. Strata buildings in Sydney are subject to a unique set of challenges: high foot traffic in shared areas, exposure to coastal salt in suburbs from Bondi to Manly, and legal obligations under the Strata Schemes Management Act 2015 that require owners corporations to keep common property in good condition. Once concrete begins to deteriorate, the costs start to add up.

Wizcrete, a concrete resurfacing specialist located in Sydney, collaborates with strata managers and owners corporations throughout the greater Sydney area. They evaluate, repair, and resurface concrete before minor damages escalate into major liabilities. Grasping the resurfacing process, as well as your obligations under NSW strata law, is crucial to devising an effective maintenance strategy.

Who Bears the Responsibility for Concrete Repairs in Strata Properties?

This issue is one of the leading causes of strata disputes. The simple answer: if the concrete is located on common property, the cost falls on the owners corporation. If it’s within a lot, the lot owner is responsible. However, the actual situation is often more complicated than this.

Duties of the Owners Corporation versus Individual Lot Owners

According to the Strata Schemes Management Act 2015, the owners corporation is legally required to ensure all common property is well-maintained and in good working order. This includes concrete driveways, pathways, carparks, pool surrounds, and building facades. Conversely, individual lot owners are responsible for everything within their own lot, usually starting at the interior surface of external walls and floors.

Understanding the Difference Between Common Property and Lot Property

Many strata committees struggle to understand where the line is drawn between common property and lot property. For example, a concrete balcony slab is often a point of confusion. The structural slab is typically considered common property, but the surface finish or tiles on top might be the responsibility of the lot owner. Other areas like carpark floors, building entrance slabs, stairwells, and external pathways are almost always common property. If there is ever any confusion, the strata plan should be referred to for clarification. It is also a good idea to get a formal determination in writing to protect all parties involved.

Strata Repairs Regulations Under NSW Fair Trading

NSW Fair Trading is in charge of managing strata disputes, and according to current rules, owners corporations are not allowed to disregard common property concrete that is deteriorating. If the owners corporation does not take action on known damage — particularly when it poses a safety risk — they could be vulnerable to liability claims. Tenants and lot owners should send repair requests to the strata manager or strata committee, and the owners corporation is in charge of planning and funding those repairs, including fixing structural defects.

Responsibility Breakdown

Concrete Area	Responsible Party	Who Arranges Repair
Driveway & carpark floor	Owners Corporation	Strata Manager / Committee
External pathways	Owners Corporation	Strata Manager / Committee
Balcony structural slab	Owners Corporation	Strata Manager / Committee
Balcony surface finish	Lot Owner	Individual Lot Owner
Internal lot floor slab	Lot Owner	Individual Lot Owner
Building entrance slab	Owners Corporation	Strata Manager / Committee

How to Know Your Strata Concrete Needs Attention

Concrete doesn’t crumble overnight. It’s a slow process, and the early signs are easy to overlook — until they’re not. Spotting damage at the right time can mean the difference between a resurfacing job and a full replacement bill.

Strata committees should plan to visually inspect all common property concrete at least annually. This is especially important following significant weather events. The storm season in Sydney, coupled with periods of heavy rainfall, can drastically speed up surface damage.

Interpreting Surface Cracks

Minor hairline cracks in concrete surfaces are usually just superficial and a normal result of the curing process. However, if you see cracks wider than 0.3mm, cracks running alongside the reinforcement bars, or any cracks with accompanying surface displacement, these are structural red flags that need to be professionally evaluated as soon as possible. In the case of strata properties, neglecting these can lead to water seeping into the slab, corroding the steel reinforcement below and causing spalling — a much more costly issue.

Signs of Spalling, Staining, and Water Damage

Spalling is a condition where pieces or flakes of concrete break off from the surface, often caused by the expansion of corroding steel reinforcement within the slab. It’s one of the most frequent — and most pressing — problems in Sydney strata buildings, especially in coastal suburbs where the air is full of salt, accelerating the corrosion of steel. Rust-coloured staining on concrete surfaces is almost always a sign that the corrosion of reinforcement is already happening beneath the surface.

How to Handle Different Types of Concrete Damage

Type of Damage	How Bad Is It?	What Should You Do?
Thin cracks on the surface	Not too bad	Keep an eye on it and seal it
Cracks that are wider than 0.3mm	Moderate	Get a professional to look at it
Small areas of surface spalling	Moderate to severe	Resurface using repair compounds
Rust stains on the surface	Severe	Get a professional to inspect it right away
Large areas of spalling and exposed rebar	Very severe	Repair or replace the structure
Water pooling and delamination	Severe	Resurface or correct the drainage

When you see water stains or efflorescence — those white, chalky deposits that show up on concrete surfaces — it means that moisture is getting through the slab. If you don’t do anything about it, this moisture movement will weaken the concrete matrix and cause any surface coating or overlay that’s been applied to delaminate progressively. To learn more about improving the durability of concrete surfaces, consider reading this guide on concrete resurfacing.

When a Visual Inspection Is Not Enough

At times, the concrete might appear to be in good condition on the surface but has extensive internal damage. If your strata property has older concrete, a history of water leaks above a slab, or visible rust staining without obvious spalling, it would be wise to get a professional concrete assessment using methods like hammer sounding or cover meter testing. These techniques can identify delamination and reinforcement corrosion that a visual inspection would not be able to detect.

In Sydney strata buildings built prior to the 1990s, it was quite common to see subpar concrete cover over reinforcement. This means that the steel bars are closer to the surface and are therefore more susceptible to damage from moisture and chloride penetration. If your building falls into this category, it’s not just recommended to have proactive professional inspections, it’s absolutely necessary.

Should You Resurface or Replace Your Concrete?

This is the question that will determine your maintenance budget. Resurfacing is much cheaper than replacement, but it’s only a good choice if the concrete underneath is still in good condition. If the concrete is damaged, resurfacing won’t help and you’ll have wasted your money.

When Resurfacing Is the Better Option

If the current slab is structurally sound but shows signs of surface-level wear and tear, resurfacing is the way to go. This includes surface scaling, minor cracks, worn or stained finishes, and areas where the surface coating has failed but the concrete underneath is still solid. A resurfaced concrete surface can last for 15–25 years, is water-resistant, has improved salt resistance, and has a compression rating that’s about 30% stronger than untreated aged concrete — all without the hassle and expense of demolition and replacement.

Resurfacing is especially beneficial for strata properties in areas with heavy foot traffic such as carparks, pool decks, and building entrances where it is necessary to maintain both visual appeal and safety. The cost savings over replacement make it much easier to gain approval from the owners corporation, a fact that seasoned strata managers are well aware of.

In general, expert concrete resurfacing in Sydney can last anywhere from 10 to 15 years. However, with the right sealing and maintenance, it can last up to 25 years. The coastal environment does pose some additional challenges, but with the right products and preparation, these can be accounted for.

When Replacement is the Only Option

When the slab has extensive structural cracking, significant rebar corrosion and spalling over large areas, or when the concrete has lost enough compressive strength that resurfacing won’t provide enough load-bearing support, replacement is necessary. If a professional assessment confirms that more than 30–40% of the slab area is structurally compromised, replacement is the only viable option.

Approaches to Concrete Resurfacing in Sydney Strata Properties

There’s no one-size-fits-all solution when it comes to resurfacing. The best method depends on a variety of factors, including the location, the amount of foot or vehicle traffic, the current condition of the concrete, and the desired aesthetic result. Contractors in Sydney typically use several different methods when working on strata properties, each of which is best suited to certain situations.

By knowing these methods, strata committees can make educated decisions when looking over contractor proposals. This also helps them avoid the frequent error of agreeing to a one-size-fits-all solution for a property with a range of concrete surfaces and different performance needs.

• Epoxy coatings — Great for interior common areas that see a lot of traffic, such as carparks, basement floors, and entrances to buildings. This provides a surface that is resistant to chemicals and is hard-wearing. Anti-slip additives can also be added to comply with safety regulations.
• Polymer overlays — These are used on driveways and outdoor carparks where the ability to flex under load and resistance to weather are important. This bonds well with existing concrete and can handle minor movement without cracking.
• Grinding and sealing — This is good for older concrete with surface scaling or minor unevenness. Mechanical grinding is used to remove the damaged surface layer and expose a new concrete face, which is then sealed to make it durable.
• Fiber-reinforced repair mortars — This is used where structural repairs are needed for spalled or damaged areas before any overlay is applied. The fiber reinforcement improves tensile strength and resistance to cracking in the repaired areas.
• Decorative overlays including stamped concrete and concrete stencils — These are popular for pool surrounds, entertainment areas, and building entrances where aesthetics are just as important as durability.

High-Traffic Common Areas and Epoxy Coatings

Epoxy coatings are the most specified product for strata carparks and basement floors in Sydney, and there’s a good reason for that. A two-part epoxy system chemically bonds to the existing concrete substrate, creating a surface that can resist oil, water, chemical spills, and the constant abrasion of vehicle and foot traffic. For strata properties with basement carparks, epoxy coatings also meet the slip-resistance requirements under the National Construction Code, which is a compliance consideration owners corporations cannot ignore. Learn more about the longevity and durability of concrete resurfacing in Sydney.

Driveway and Carpark Polymer Overlays

When it comes to Sydney strata driveways and open-air carparks that are constantly exposed to vehicle loads, rain, and UV, polymer-modified overlays are the go-to solution. These overlays are usually applied directly over prepared existing concrete at a thickness of 3–6mm, creating a new wearing surface that’s tightly bonded to the original slab. Unlike rigid epoxy, polymer overlays have a degree of flexibility that allows them to handle minor slab movement without cracking. This is a critical property in Sydney, where seasonal temperature variation and subbase movement are significant factors.

Contractors in Sydney prefer to use polymer overlay products that are a blend of cementitious-polymer. These products offer compressive strengths that exceed 40MPa once cured, which is comparable to freshly poured structural concrete. This makes them ideal for driveways that need to carry heavy vehicle loads, as there is no risk of surface delamination under stress. Applying these products requires a careful consideration of the ambient temperature and humidity conditions. This is why experienced contractors in Sydney plan their overlay work to avoid the peak summer heat and do not apply the product if rain is forecasted. For more insights, check out this guide on concrete resurfacing processes and benefits.

Comparing Resurfacing Techniques for Strata Use

Technique	Ideal Use	Thickness	Estimated Lifespan	Main Benefit
Epoxy Coating	Basement floors, carparks	1–3mm	10–15 years	Resistance to abrasion & chemicals
Polymer Overlay	Open carparks, driveways	3–6mm	15–20 years	Adaptable to load & weather conditions
Grind & Seal	Old internal/external slabs	Surface only	10–12 years	Minimal change in thickness
Fiber-Reinforced Mortar	Damaged or spalled areas	10–50mm	20+ years	Ability to repair structurally
Decorative Overlay	Entries, pool decks	3–10mm	15–25 years	Flexible in terms of aesthetics

When choosing a technique for a strata property, cost should not be the only deciding factor. A polymer overlay in a carpark where oil contamination is a frequent problem would fail prematurely, as oil-soaked concrete doesn’t bond well with cementitious overlays. In this situation, an epoxy system with a penetrating primer would be needed. The key to achieving a result that lasts 20 years, rather than failing after three, is to match the product to the site’s specific conditions. For more insights, consider reading this guide on concrete resurfacing processes.

Refinishing Old Concrete Surfaces with Grinding and Sealing

If the concrete at your strata property is still structurally sound but the surface is uneven, pitted, or scaled, the simplest and most effective resurfacing method is grinding and sealing. A diamond grinding machine will remove the top 1–3mm of the concrete surface in a single pass, getting rid of surface contamination, any previous coatings that have failed, and minor unevenness. The newly exposed concrete is then sealed with a surface-applied polyurethane or acrylic coating or a penetrating sealer. This locks out moisture and restores a clean, durable finish, without significantly increasing the thickness of the surface.

Using Fiber-Reinforced Repairs to Maintain Structural Integrity

Before applying any resurfacing overlay, it’s essential to address areas of active spalling or structural damage. This involves cutting back these areas and filling them with a fiber-reinforced repair mortar. Products such as Sika MonoTop or Fosroc Renderoc are examples of these mortars. They contain polypropylene or steel fibers that bridge micro-cracks as the material cures, significantly enhancing tensile and flexural strength compared to standard cement-based repair fillers. In strata buildings, this repair step is mandatory wherever exposed reinforcement has been identified. This is because simply sealing over active corrosion without treating the source only traps the problem, causing the damage underneath to worsen over time. For more insights, you can explore the longevity and durability of concrete resurfacing.

How the Climate in Sydney Impacts Concrete in Strata Buildings

Impact of Sydney’s Climate on Strata Concrete

Climate Factor	Impact on Concrete	Areas Most Affected	Protective Measure
Coastal salt air	Speeds up rebar corrosion	Eastern & Northern suburbs	Chloride-resistant sealer
High humidity	Moisture ingress & efflorescence	All Sydney strata	Penetrating waterproof sealer
UV exposure	Breaks down acrylic & surface coatings	Open decks, pool surrounds	UV-stable polyurethane topcoat
Heavy rainfall	Surface erosion & water pooling	Driveways, pathways	Proper drainage & sealed surface
Thermal cycling	Expansion cracking	Exposed slabs & driveways	Flexible polymer overlay

The climate in Sydney is particularly harsh on concrete — and strata properties feel it the most because they have large concrete surfaces that are heavily used and directly exposed to the elements. The mix of coastal salt air, high humidity, strong UV radiation, and periods of heavy rainfall creates a deteriorating environment that’s much more aggressive than in Australian cities located inland.

Strata buildings that are 1–2km from the coastline, such as those in Bondi, Coogee, Manly, or Cronulla, have to deal with air that is full of chloride. This air can get into the concrete and start to attack the steel reinforcement from the inside. The corrosion that is produced, which is rust, takes up more space than the original steel. This causes the concrete to physically break from the inside, which results in the spalling damage that is often seen on older Sydney strata buildings.

Properties located farther from the coast are subjected to a unique blend of pressures. Suburbs in Western Sydney are subjected to more extreme temperatures — exposed concrete slabs can reach surface temperatures of over 60°C in the summer — resulting in significant cycles of thermal expansion and contraction. Over time, this repeated movement creates surface cracks that allow water to seep in and start the cycle of deterioration from a different angle.

The point here for strata managers is simple: concrete in Sydney doesn’t age well without some help. A sealed, well-maintained surface can slow down the aging process a lot, no matter what kind of weather you’re dealing with in your area.

Weathering and Surface Wear

With an average annual rainfall of about 1,200mm, Sydney experiences many severe weather events that can be particularly damaging to flat or low-gradient concrete surfaces. Older strata properties often have inadequate drainage — a problem that becomes apparent when water is left standing on concrete surfaces for too long. The water seeps into the concrete through capillary action, dissolving the calcium compounds in the cement paste and gradually weakening the surface layer over time. For more insights on maintaining concrete surfaces, explore the concrete resurfacing process.

When there is high humidity, it slows down the evaporation of surface moisture in between rain events. This makes concrete that stays damp for a long time more prone to efflorescence, biological growth (like algae and lichen, which hold moisture and produce organic acids), and delamination of any surface coating that wasn’t applied to a properly dried and prepared substrate. This is a strong case for strata managers to make sure that drainage is evaluated and fixed as part of any concrete resurfacing project, not as an afterthought.

How UV Exposure Affects the Longevity of Sealed Surfaces

In Sydney, the UV index often reaches the extreme category during the summer months, which can have a significant effect on the longevity of concrete surface coatings. If acrylic sealers and decorative coatings do not contain UV stabilisers, they will chalk, yellow, and lose adhesion within 3–5 years on exposed surfaces. Therefore, using a UV-stable aliphatic polyurethane topcoat over any decorative or protective coating on strata properties in Sydney should not be considered a premium upgrade, but rather the standard for achieving a result that will last for the expected service life.

What to Expect from a Professional Concrete Resurfacing Job

Typical Resurfacing Process Timeline for Professionals

Stage	Activity	Timeframe
1. Assessment	Inspection of the concrete’s condition, hammer sounding, documentation	Day 1
2. Surface Preparation	Pressure washing, grinding, crack repair, contamination removal	Days 1–2
3. Structural Repairs	Applying fiber-reinforced mortar to damaged zones, cure	Days 2–3
4. Primer Application	Applying bonding primer and allowing it to tack	Day 3
5. Overlay/Coating	Applying the main resurfacing product as per specification	Days 3–4
6. Topcoat & Sealing	Applying protective sealer or topcoat once overlay cures	Day 5
7. Cure & Handover	Observing full cure period before traffic is permitted	Days 5–7

A professional resurfacing job for a strata property involves multiple stages and takes at least several days. Be wary of any contractor who promises to complete a large common area surface in a single day. Each stage is built on the previous one, and if any step is skipped or rushed, the entire system’s performance and longevity will be compromised.

The preparation phase usually takes up 40–60% of the total labour time on a well-executed project. This ratio often shocks strata managers when they first see a professional resurfacing quote, but it accurately shows where the bulk of the work is done. A coating applied to a poorly prepared surface will fail, no matter how high-quality the product is. The preparation is the main task; the product application is simply the last step.

Knowing what’s involved can also assist strata committees in accurately assessing competitive quotes. A substantially lower quote that does not itemize surface preparation time and structural repair expenses is likely skimping on the steps that dictate how long the outcome will actually endure. For more details, you can explore Sydney strata concrete repair services.

Surface Preparation: The Crucial Step That’s Often Overlooked

The first step in a professional strata concrete resurfacing job is a thorough pressure wash, usually at 3,000–5,000 PSI. This removes surface contamination, biological growth, and any previously applied coatings that are failing or delaminating. After that, the concrete surface profile is opened up by mechanical grinding or scarifying using diamond-tipped equipment. This is a critical step because it allows the overlay or coating to achieve a proper mechanical bond. The International Concrete Repair Institute (ICRI) has specific surface profile requirements for different overlay systems. Professional contractors in Sydney follow these standards closely.

Once the grinding is complete, each crack is carefully examined and either routed or chased to a consistent width before being filled with a suitable repair material. For dynamic cracks, a flexible polyurethane sealant is used, while dormant ones are filled with rigid epoxy or cement-based filler. On a strata property with a variety of surface types and conditions over a large area, this preparation work is truly labor-intensive and physically demanding. This meticulous preparation is exactly what sets professional resurfacing apart from DIY methods and is the main factor in determining the longevity of the finished surface.

How to Apply Materials and the Time it Takes to Cure

After the substrate has been prepared, a bonding primer is applied. The primer must reach the correct tack level before the main overlay or coating product can be applied. The tack level is usually reached within 30 to 60 minutes, but this can depend on the surrounding conditions. Overlay products are typically applied using a trowel or a squeegee in a controlled manner to ensure that the thickness is consistent across the entire surface. Each layer requires a specific amount of time to cure before the next layer can be applied. The entire system must reach its minimum cure time before any foot or vehicle traffic is allowed. In the summer temperatures of Sydney, the cure times for epoxy systems can be accelerated. However, UV-stable polyurethane topcoats that are applied in high heat require additional care to prevent the surface from bubbling.

Sealing After Resurfacing and Regular Maintenance

The final stage of sealing determines how well the entire resurfacing system will perform in the long run. A high-quality penetrating sealer is applied after the overlay has cured, filling the remaining micro-porosity of the surface. This locks out water, oils, and chlorides before they can start the cycle of deterioration again. For strata properties, a regular maintenance schedule is needed. This typically includes a re-seal every 2–3 years and immediate attention to any surface damage or cracking. This is what extends the service life of the resurfaced concrete from 10 years to over 20 years. Wizcrete recommends incorporating this maintenance schedule into the strata’s 10-year capital works fund plan. This way, it’s funded proactively rather than reactively.

Steps to Secure Strata Approval for Concrete Resurfacing Projects

Obtaining approval for projects in a strata property involves understanding the owners corporation structure, and the process can differ based on the price and size of the proposed projects. According to the Strata Schemes Management Act 2015, the strata committee has the authority to approve regular maintenance and repairs up to a spending limit set by the owners corporation, which is typically $30,000 for most schemes in Sydney. Resurfacing projects that are larger and exceed this limit require a resolution at a general meeting with appropriate notice provided to all owners.

Want to get your project approved quickly? Then you need to come prepared. If you bring a well-documented case to the committee — one that includes a clear explanation of the current damage, what could happen if it’s not addressed, professional quotes, and a recommended scope of works — you’ll significantly shorten the approval timeline and decrease the chance that the project will stall due to owner objections based on incomplete information.

Bringing Up the Problem at a Strata Committee Meeting

The first thing you should do is bring up the condition of the concrete as an official item on the agenda at the upcoming strata committee meeting. You should bring pictures of the damage, any inspection reports that are relevant, and a short written summary of how urgent the repairs are. If there’s a risk to safety — for example, concrete spalling in an area where people walk — make it clear that it’s the owners corporation’s responsibility to make sure people are safe. Committees are more likely to respond quickly to safety and liability issues that are documented than they are to issues that are only about how things look.

Obtaining Estimates and Presenting Them to the Owners Corporation

Usually, the owners corporation will need at least two to three similar estimates before they approve spending on concrete projects. When you get estimates, make sure each contractor is looking at the same work scope and providing itemised details that separate surface preparation, structural repairs, overlay or coating materials, and sealing stages. Estimates that group everything into a single line item are hard to compare accurately and more difficult to justify to an owners corporation that has members asking detailed questions.

When you’re presenting quotes at a general meeting, make sure you provide a recommendation along with the options, and explain why you’re making that recommendation. For example, a strata manager might present three quotes and say “we recommend Option B because it includes fiber-reinforced repairs to the spalled zones in the carpark and uses a UV-stable topcoat suited to the building’s northern exposure.” This gives the owners the information they need to make a confident decision. And a decision that’s made with all the necessary information is much less likely to be challenged or delayed. For more information on the durability of such solutions, check out this concrete resurfacing durability guide.

What to Expect During Approval and Timelines

After the owners corporation reviews and approves the quotes, the approval process generally moves from a formal written resolution to a notice of works issued to affected lot owners, and finally to contractor engagement. For standard resurfacing works on common areas like carparks or pathways, it usually takes 4–8 weeks from the initial committee discussion to the contractor start date in a well-managed strata scheme. Larger projects requiring a special resolution or where owner objections need to be addressed can extend that timeline to 3–6 months. Make sure to factor in this lead time into your planning — especially if the works need to be completed before a specific season or event.

Expected Lifespan of Resurfaced Concrete on Strata Properties

When the appropriate procedure is applied to the correct surface and the preparatory work is carried out diligently, the resurfaced concrete on a strata property in Sydney can be expected to last for a period of 15 to 25 years. The lower limit of this range is more applicable to areas with high traffic, such as carparks that are frequently used by heavy vehicles and properties located near the coast. The higher limit can be achieved on surfaces that are meant for pedestrians and are located in sheltered areas, provided a proactive maintenance and re-sealing program is implemented. The most important factor that determines the lifespan of the resurfaced concrete is the quality of the preparatory work that was carried out. A well-prepared base that is overlaid with a high-quality product will always last longer than a top-of-the-line product that is applied over a poorly prepared base. For more information on this topic, check out this guide on concrete resurfacing longevity.

How to Select the Best Concrete Resurfacing Contractor in Sydney

Choosing the right contractor is where many strata properties fall short — and it’s the difference between a job that lasts 20 years and one that fails after just three. Sydney is teeming with contractors offering concrete resurfacing services, but the quality, licensing, and technical capability varies greatly. A contractor who does a great job on a residential driveway might not be able to handle a multi-level strata carpark that requires structural repairs, drainage corrections, and compliance requirements.

Choosing the right person for the job is just as important as the technical aspects of the job itself. By taking the time to check qualifications, ask important questions, and review previous work in strata properties, the owners corporation can avoid subpar work and potential issues with insurance and compliance.

NSW Licensing and Insurance Requirements

Contractors in NSW who are performing concrete resurfacing work valued at over $5,000 (which includes labour and materials) are required to have a valid contractor licence issued by NSW Fair Trading. For structural concrete repairs, the most common licence categories are General Building Work or Concrete and Formwork. If a contractor is unable to provide a current NSW Fair Trading licence number, they should be automatically ruled out for a strata project.

The contractor must also have up-to-date public liability insurance with at least $20 million in coverage, the standard minimum for strata property works in NSW. They should also have workers compensation insurance for all employees working on site. Don’t just take their word for it – ask for certificates of currency, and make sure to check that the certificates are current and that the policy limits meet strata requirements before any work begins. If you use a contractor who doesn’t have insurance, or doesn’t have enough insurance, on common property, the owners corporation could be held directly responsible for anything that goes wrong during the works. For more insights on enhancing property values through concrete works, check out this guide on concrete resurfacing.

What to Consider Before Signing a Contract

A reliable contractor will respond to these queries directly and with confidence. If they are hesitant or vague in their responses, that could be a red flag.

• Could you share your NSW Fair Trading contractor license number for verification purposes?
• What method will you use for surface preparation and what ICRI surface profile will you achieve?
• Could you specify the products you will be using, including the brand name, product code, and technical data sheet?
• How do you plan to manage the structural repairs to the spalled zones before applying the overlay?
• What is the minimum cure time before foot and vehicle traffic is allowed?
• Do you offer a written warranty on both workmanship and materials, and if so, for how long?
• Could you provide references from at least two similar strata property projects you have completed in the past 24 months?
• Are your workers employees or subcontractors, and are all subcontractors covered under your insurance policies?

Warning Signs of an Untrustworthy Contractor

The most dangerous contractor in the strata space isn’t the one who gives an obviously high quote — it’s the one who gives a deceptively low quote with a scope that quietly leaves out the preparation work, structural repairs, and quality materials necessary for a resurfacing job to last. Learning to critically read a quote is one of the most useful skills a strata manager can learn.

Be wary of a single-line quote that doesn’t break down the costs of preparation, repairs, materials, and labour. Quality contractors are not afraid to show you exactly what they’re doing and what they’re charging for because the details justify the cost and show their expertise. For more information on ensuring quality and durability, check out our longevity and durability guide.

Another big warning sign is when there are demands for a large cash payment upfront, especially if it’s over 10-20% of the total contract value before the work even starts. The usual business practice for strata work is to have a staged payment schedule that is tied to project milestones, not large advance payments that leave the owners’ corporation with little recourse if the quality of work is subpar.

Ultimately, you should steer clear of any contractor who dissuades you from obtaining competing quotes, rushes you to sign a contract, or fails to provide documented references from previous strata clients. No matter how tempting their price may be. The strata committee is obligated to act in the best interests of the owners’ corporation, and part of that obligation includes due diligence when selecting a contractor.

• Quote doesn’t itemise costs — You should see preparation and repair costs separated from materials and labour
• Unable to verify NSW Fair Trading licence — This is a legal requirement, not a preference, so walk away if you can’t verify it
• Demands a large upfront cash deposit — The standard practice is to pay in stages as milestones are reached, not to pay upfront
• Discourages or refuses to allow competing quotes — Legitimate contractors don’t mind comparison because they know their quality will stand up under scrutiny
• Doesn’t offer a written warranty — Every professional resurfacing job should come with a written warranty that guarantees the workmanship for at least 5 years
• Product specifications are vague — If they can’t tell you exactly what product they’re using and give you a technical data sheet, they’re cutting corners somewhere
• Doesn’t have any references specific to strata — Just because they’ve done residential driveways doesn’t mean they’re equipped to handle strata projects

Proactive Maintenance is the Most Cost-Effective Strategy for Concrete Management

The most cost-effective way to manage concrete for any strata property in Sydney is to be proactive. It’s cheaper in the long run to have annual inspections, fix minor surface damage promptly, re-seal every 2–3 years, and maintain adequate drainage than to pay for emergency repairs or replace the whole thing prematurely. Instead of treating concrete maintenance as an ad hoc expense, build it into the 10-year capital works fund plan. This gives the owners corporation financial visibility and helps prevent budget shocks that can happen when deterioration is allowed to progress unchecked. A well-maintained resurfaced concrete surface in a strata building in Sydney will consistently perform at the top of its expected service life range. This protects the physical asset and the property values of every lot owner in the scheme.

Commonly Asked Questions

What is the recommended frequency for concrete surface inspections in strata properties in Sydney?

For strata properties in Sydney, it is recommended that a visual inspection of all common property concrete surfaces be carried out at least once every 12 months. After any significant weather event such as a major storm or a period of heavy rainfall, an additional inspection should be conducted. Buildings that are within 1–2km of the coastline — where chloride exposure can speed up deterioration — should be inspected twice a year. If there are any visual signs of damage, such as cracking, rust staining, or spalling, a professional assessment should be carried out immediately instead of waiting for the next scheduled review cycle.

Is it possible for a single lot owner to arrange for concrete resurfacing on shared property?

No, it is not. The Strata Schemes Management Act 2015 prohibits individual lot owners from arranging or commissioning resurfacing work on shared property without the express consent of the owners corporation or strata committee. According to this law, the owners’ corporation must authorise any repairs or improvements to shared property. If an owner arranges unauthorized work on shared property, they may be required to undo that work at their own expense and could face legal action from the owners corporation. The correct procedure is for the lot owner to formally request the repair from the strata manager or committee in writing.

Does resurfacing concrete boost the value of strata properties in Sydney?

Absolutely — and it makes a bigger difference than many lot owners realise. If the common areas of a strata building are well kept and have been resurfaced recently, this will have a direct impact on how the building is presented. This, in turn, will affect how the building is perceived by potential buyers and how it is valued when it comes to selling the property. In the competitive market for apartments in Sydney, buildings where the concrete in carparks, entrances and common areas is visibly in a state of decay are likely to receive lower offers and take longer to sell. On the other hand, a building where the common areas are in good condition is a sign of active, effective strata management — and this is a real factor that drives value when buyers are making their decision.

How much time does it take to resurface concrete on a strata property?

Typical Duration of Projects Depending on their Scope

Scope of the Project	Approximate Duration	Main Variable
Single level carpark (up to 500m²)	3–7 days	Amount of structural repairs needed
Multi-level carpark (500–2,000m²)	7–14 days	Staging to keep partial access
Driveway and entrance (up to 200m²)	2–3 days	Weather conditions during the application of the overlay
Pool deck and surrounds (up to 150m²)	3–5 days	Complexity of the decorative finish
Common areas of the entire building (mixed surfaces)	2–4 weeks	Staging, cure times, and coordination of access

The durations listed above are the active working days when the weather conditions are suitable. The summer period in Sydney, especially from December to February, can cause delays if the ambient temperatures go beyond the application windows for certain overlay products, and rain can stop work on outdoor surfaces completely until the concrete is adequately dry. Professional contractors schedule around these variables and build contingency into the timelines of the projects for strata work.

In the case of strata properties, the project timeline must also incorporate a disruption management plan. Resurfacing a car park, for instance, usually necessitates the staged shutdown of sections so that residents can maintain some vehicle access while the work is being done. This phased method extends the overall project length compared to a total shutdown, but it’s typically the best compromise in a residential strata setting where owners and tenants require adequate warning and ongoing access provisions.

One of the most overlooked aspects of a successful strata resurfacing project is communication. Strata managers who provide clear written notices to all affected lot owners and tenants about the expected duration of the project, access arrangements during the works, and a contact point for any questions or concerns, tend to have significantly fewer complaints and disputes during the project than those who do not prioritize resident communication. For more insights on this, check out our guide on concrete resurfacing processes.

Does strata building insurance in NSW cover concrete resurfacing?

Typical strata building insurance policies in NSW cover unexpected and unintentional damage to common property, including concrete structures. However, they do not cover the cost of regular maintenance, resurfacing due to standard wear and tear, or work done to improve the condition of existing concrete that hasn’t experienced an insured event. This distinction is crucial when a strata committee is planning concrete work and hoping to use insurance funds.

However, if the concrete damage is a result of a specific event that can be insured — such as a vehicle impact in a carpark, a burst pipe causing water damage to a concrete slab, or storm damage — the repair and reinstatement of the affected concrete surface may be claimable. The key is to lodge any potential claim promptly and have the damage professionally documented before remediation works begin, as insurers require evidence of the cause and extent of damage before approving claims.

Capital works resurfacing, which is the most common type of resurfacing needed in Sydney strata properties, is funded by the capital works fund (sinking fund) and not insurance. The Strata Schemes Management Act 2015 mandates owners corporations to maintain a 10-year capital works fund plan that predicts major maintenance costs. Concrete resurfacing is a common item in any well-prepared plan for a building that is more than 10–15 years old.

When a recent building condition report identifies concrete maintenance needs that exceed the funds in your strata’s capital works fund, a special levy may be necessary to cover the cost of the work. This is a common occurrence in Sydney strata buildings, where there has traditionally been a lack of adequate planning for capital works. This is a strong case for proactive maintenance instead of reactive repair, as it is always less expensive to deal with concrete problems while they are still at the resurfacing stage than to fund emergency structural repairs from an underfunded sinking fund.

If you are a strata manager or owner corporation in Sydney and you want to safeguard your concrete assets with correctly specified, professionally performed resurfacing work, Wizcrete offers specialized concrete resurfacing services that are customized to meet the unique needs of strata properties throughout the greater Sydney area.