Exposed Aggregate, Coloured or Plain: Choosing a Concrete Finish

Plain non-slip costs the least and forgives the most. Coloured concrete lifts the look for a modest step up. Exposed aggregate costs the most of the three, grips best when wet, and hides marks better than either. Which one is right depends on where the concrete is going, not on the photo you liked.

I get shown a lot of Pinterest boards at site visits, and I like that people turn up knowing what they want. But a finish that looks great on a shaded Melbourne courtyard can be the wrong call on a north-facing Sale driveway. So here is how the three main finishes actually behave, and the jobs where each one earns its place.

The three finishes, side by side

Where plain concrete is the right call

Plain gets talked down because it's the default, but on plenty of jobs it's the honest answer. A shed apron, a clothesline pad, a path down the side of the house that nobody looks at, a big rural driveway where the budget is better spent on thickness and base prep than on looks. A broom finish gives real grip, and the money you save can go into the parts of the job that decide how long it lasts.

The trade-off is cosmetic. Plain grey shows tyre marks, oil and leaf stain more than anything else, and in older Sale streets where most driveways are plain, that's just what driveways look like. If that bothers you, keep reading.

Where coloured concrete wins

Coloured concrete is the middle path. The colour goes through the mix as an oxide, so it's not a coating that can peel. It suits paths, patios and house surrounds where you want the concrete to sit quietly with the house colours rather than read as raw grey.

Two honest warnings. First, dark charcoals look sharp on day one and get genuinely hot in full January sun, which matters around pools and on north-facing patios where kids run barefoot. Second, every coloured slab fades a little over the years, and sun does most of it. A penetrating seal slows that down a lot, which is why we talk about resealing at the quote stage rather than letting you find out in year four.

We did a coloured path in Sale last spring where the owners matched the oxide to their roller door. Small job, but it's the kind of decision that makes the whole front of the house look considered instead of assembled.

Where exposed aggregate earns its price

Exposed aggregate is the finish where the stone in the mix becomes the surface. You pick the stone blend and the cement colour behind it, so no two driveways read quite the same. It's the go-to in the newer Sale estates, and there's a practical reason it took over around pools: the stone grips bare wet feet, it doesn't cook like a dark trowelled surface, and it hides splash marks, sunscreen and leaf stain better than any other finish.

The costs are real. It's the most expensive of the three up front, the finish depends heavily on getting the wash-off timing right on the day, and it wants a reseal every few years. Around Paynesville and the Lakes, salt air blooms through unsealed exposed faster than people expect, so on those jobs we recommend two coats of penetrating seal in the first year and mean it.

Stamped, stencilled and spray pave

Past the main three there's stamped and stencilled concrete, where a pattern goes into fresh concrete, and spray pave, which is a decorative layer bonded over an existing slab. Stamped suits people who want a paved look without pavers lifting on reactive ground. Spray pave is the one to ask about when the slab you have is sound but tired, because it costs a fraction of a rip-out.

Mixing finishes on one job

Some of the best-looking jobs we do use two finishes. An exposed aggregate driveway with a plain broomed border. A coloured patio with an exposed band where it meets the lawn. Because it's one pour and one mobilisation, the second finish costs less than doing it as a separate job later, and the colours match because everything came off the same truck.

What I'd steer you away from

• A smooth trowelled finish anywhere outdoors that gets wet. It's a skating rink in winter, and around a pool it's a hazard, not a finish
• Dark charcoal in full sun around a pool, for the barefoot reason above
• Exposed aggregate on a tight budget. If choosing it means thinning the slab or skipping base prep to make the numbers work, choose plain and pour it properly instead
• Picking any finish off a phone screen alone. Stone blends and oxides read differently in real light, which is why we bring samples to the site visit

Decide it standing on your block

The finish is the last thing that goes on and the first thing everyone sees, so it's worth choosing with the actual site in front of you: which way it faces, what's around it, who walks on it barefoot. Book a site visit and Nick will bring the samples, talk through what suits the job, and put the options in a written quote so you can compare them properly. Or give me a call.