Exposed aggregate concrete is a popular choice in Perth. It is used for driveways, patios, and walkways. People like it because it is strong, slip-resistant, and has a beautiful finish.
However, like any surface, it’s not immune to damage over time. Weather, wear, and poor sealing can cause cracks, loose stones, or fading — making your outdoor areas look tired and uneven.
If your exposed aggregate shows damage, don’t worry. Many problems can be fixed with the right method. This guide shows you how to fix exposed aggregate concrete. It also tells you when to do it yourself and when to hire a professional.
Common Issues with Exposed Aggregate Concrete
Before jumping into repairs, it’s important to identify the type and severity of the damage. Common issues include:
- Hairline or surface cracks caused by ground movement or shrinkage
- Worn or dull finishes due to UV exposure and foot traffic
- Loose or missing stones in high-traffic or poorly sealed areas
- Discoloured patches from stains or inconsistent sealing
Knowing the problem will help you choose the best repair method. It will also help you decide if you should do it yourself or hire a professional.
Want to learn more about what exposed aggregate is and why it’s so popular in WA? Read our full overview.
Can You Fix Exposed Aggregate Yourself?
Yes — some minor repairs are safe and easy to complete on your own, particularly if you’re dealing with:
- Small cracks or chips
- Surface wear and discolouration
- Isolated spots with loose or missing stones
However, if you’re seeing deeper structural damage, major surface loss, or widespread cracking, professional repairs are recommended. A bad repair job can lead to more costly problems down the line, especially if incorrect products or methods are used.
Step-by-Step: How to Fix Exposed Aggregate Concrete
Here’s how to restore the appearance and function of your exposed aggregate concrete in four practical steps:
Step 1: Clean the Surface Thoroughly
Before repairing, you need a clean working area.
- Use a high-pressure washer to remove dirt, moss, or debris.
- For grease or stains, apply a degreasing cleaner or diluted acid solution carefully.
- Allow the surface to dry completely before moving on.
Step 2: Repair Cracks or Holes
For cracks less than 3 mm deep, use a flexible concrete crack filler or epoxy compound.
- For deeper or wider cracks, a concrete patching mix may be required.
- Apply the filler with a caulking gun or trowel and smooth the surface evenly.
Step 3: Match and Apply New Aggregate (If Needed)
If stones have come loose or chipped away:
- Mix a small batch of concrete with similar decorative aggregate.
- Apply it to the area and let it set. Once it is set, gently brush or wash away the surface mortar. This will expose the new aggregate to match the existing surface.
Step 4: Reseal the Surface
Once repairs are complete, sealing is essential to protect your surface.
- Choose a concrete sealer designed specifically for exposed aggregate.
- Apply with a roller or sprayer in dry, warm conditions.
- Select between gloss or matte finishes depending on your aesthetic preference.
Want to see how professionals manage long-term durability? Learn more about our concrete process here.
When to Call a Professional
While DIY can work for minor repairs, you should contact a concrete specialist if:
- Cracks are deep or widespread
- The repair area covers a large portion of the surface
- You want a seamless visual match between new and existing sections
- Safety is a concern — especially for driveways or pool surrounds
Professionals have the right tools, techniques, and materials to ensure a consistent, long-lasting finish. They can also help with resurfacing if your exposed aggregate surface is beyond spot repairs.
Thinking of upgrading your entire driveway? Explore our concrete driveway services for long-lasting, low-maintenance solutions.
How Much Does It Cost to Fix Exposed Aggregate in 2025?
Here’s a general idea of the costs associated with exposed aggregate concrete repair:
Type of Repair Estimated Cost (AUD)
DIY crack filler & resealing $150–$400
Professional patch repair $300–$800+Full resurfacing or refinishing $2,000–$5,000+
The surface area, the extent of damage, and the involvement of sealing or resurfacing determine these prices. Regular maintenance — especially sealing — can help you avoid higher repair costs down the road.
How to Prevent Future Damage
After repairing your exposed aggregate, use these tips to protect your investment:
- Seal your concrete every 2–3 years to prevent wear and water absorption
- Clean the surface regularly to remove abrasive debris and stains
- Avoid harsh chemicals that can damage sealant or the concrete itself
- Ensure good drainage to prevent pooling water, which can weaken concrete over time
Restore Your Surface with Perth’s Exposed Aggregate Experts
Fixing exposed aggregate concrete can be a straightforward DIY job for minor issues — but when the damage is extensive or you’re after a flawless, long-lasting finish, it’s worth investing in professional expertise.
At CoastCrete, we specialise in designing, installing, and restoring exposed aggregate surfaces across Perth. If you have cracks, loose stones, or fading sealant, our team can help. We have the skills and tools to restore your driveway, path, or patio. We will make sure the results last.
Ready to restore or upgrade your surface? Explore our exposed aggregate concrete services and request a free quote today.
