Exposed aggregate concrete on the Mornington Peninsula
Updated October 2026
Exposed aggregate is the finish you see on most new driveways around Mornington, Mount Martha and the Sorrento end of the Peninsula. The cream is washed off the surface to reveal decorative stone, giving a tough, non-slip surface that hides dirt and suits both coastal and hinterland homes. We connect you with experienced, insured local concreters who do decorative work well. We are a referral service, not a concreting business, so you can compare contractors rather than take the first price.
What exposed aggregate costs
Guide pricing only. Published 2026 figures put exposed aggregate at roughly $120 to $220 per square metre laid across Australia, against roughly $75 to $150 for plain concrete. The gap pays for decorative aggregate, the extra finishing steps and sealing. Stone choice moves the price too, since premium pebbles cost more than standard mixes. Get a fast quote to price your job properly.
Where exposed aggregate works best
- Driveways, especially sloped ones where grip matters
- Paths and patios
- Pool surrounds, where bare feet and wet surfaces meet
- Entry courtyards and alfresco areas on new builds and beach houses
On the steep blocks at Mount Martha, McCrae and Arthurs Seat, the textured surface gives real traction in the wet compared with a smooth trowelled finish. Along the coast at Portsea, Sorrento and Blairgowrie, the stone-and-seal combination stands up well to salt spray and blown sand, provided the sealer is maintained.
How the finish is achieved
The job runs like a normal pour until the finishing stage.
1. Excavation, compacted base and formwork
2. Steel mesh reinforcement
3. The pour, using a mix batched with decorative aggregate
4. Screeding and floating without overworking the surface
5. A surface retarder applied to slow the set of the top layer
6. Washing or lightly pressure cleaning the surface the next day to expose the stone
7. Curing, control joints and a penetrating or film-forming sealer
Timing the wash-off is the skill. Too early and stone dislodges, too late and the cream will not wash clean. This is why exposed aggregate is a job for contractors who do it often. Wind matters here too: an exposed site on the back beach side can dry the surface faster than the crew expects, which is one more reason to use someone who works the Peninsula regularly.
Choosing your stone and colour
Victorian suppliers batch a wide range of mixes, from warm river pebbles to charcoal basalt and white quartz blends. The cement can be coloured as well, which shifts the whole tone of the finish. Ask your contractor for sample photos of finished jobs, and look at a cured, sealed sample rather than a wet one. If you want colour without stone, see coloured concrete.
Approvals and the fine print
The crossover between your boundary and the kerb is council land, and approval is usually needed from Mornington Peninsula Shire Council. Councils may also restrict decorative finishes on that public strip. Building work in Victoria is regulated by the Victorian Building Authority and by councils, and whether your job needs registration, a permit or both depends on its type, size and location. Ask the contractor to confirm what applies to your job before you sign.
Site and weather factors
Price movers are the same as any pour, with a couple of extras.
- Pump access on steep or tight blocks adds cost
- Demolition of old concrete adds to the quote
- Loose dune sand near the coast needs careful base preparation
- Hot, windy days make retarder timing harder, so expect early starts
- Rain on wash-off day can delay the job
Lifespan and upkeep
Expect 25 to 40 years or more from a well built exposed aggregate surface. The main maintenance item is resealing, typically every two to five years depending on traffic and exposure. Resealing keeps the stone colour rich and protects against oil stains and salt.
Ready to compare local decorative concreters? Get a fast quote.
Frequently asked questions
Is exposed aggregate slippery when wet?
It is one of the better finishes for wet grip because the exposed stone gives texture underfoot and under tyres. That is why it is popular on sloped coastal driveways and around pools.
How often does exposed aggregate need resealing?
Most contractors suggest every two to five years. Driveways in full sun or close to the beach sit at the shorter end of that range.
Can I match an existing exposed aggregate section?
Sometimes, but an exact match is hard. Aggregate blends change over time and wash-off depth varies between pours. A good contractor will get close with supplier samples, or suggest a deliberate contrast band instead.
Does exposed aggregate cost much more than plain concrete?
Yes, typically. Published 2026 guides show roughly $120 to $220 per square metre against about $75 to $150 for plain concrete. The premium covers decorative stone, extra finishing work and sealing.