How often does exposed aggregate need resealing?

Every few years is a fair guide, though a surface that cops full summer sun and winter frost may want it sooner. The sealer keeps the stone looking rich and the surface easy to hose down, so topping it up is the main upkeep.

Exposed Aggregate Toowoomba

Non-slip, hard-wearing exposed aggregate for driveways, paths, courtyards and alfresco areas across Toowoomba and the Downs, from Rangeville and Middle Ridge to Glenvale and Highfields. Tell us about your job and we will get you a quote from a concreter who does this finish locally.

Exposed aggregate washes back the top skin of the concrete to reveal the stone underneath, which gives real grip underfoot when the surface is wet or frosty, hides marks and stains, and wears far better than a smooth trowelled slab. That grip is why it is a favourite for Toowoomba's steep Range-edge driveways, where a glassy trowelled surface would be a hazard in the cold and the wet.

Grip on steep, frosty drives
Hides marks & stains
Driveways, paths & courtyards
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Why Exposed Aggregate Suits Toowoomba

Walk around the newer estates at Highfields, Kleinton or Cotswold Hills, or the established streets of Rangeville and Middle Ridge, and you will notice the same finish on driveway after driveway: a speckled, pebbly surface rather than plain grey. That is exposed aggregate, and it has become a go-to decorative finish here for reasons that go well beyond looks.

The first is grip. A steel-trowelled slab is glassy smooth, and on a steep Range-edge driveway at Rangeville, Redwood or Prince Henry Heights, wet or touched with frost, that is a genuine hazard. Exposing the aggregate leaves the stone standing slightly proud of the surface, which gives car tyres and bare feet something to hold on a slope. The second is how it wears. The surface you see is hard river stone and crushed rock, not a thin cement skin, so it copes with daily use and dragged furniture without scuffing the way a smooth topping does. The third is that it hides marks. The odd oil drip, leaf stain from the garden-city trees, general dirt, all of it disappears into the texture instead of showing on a flat grey face.

It is a durable finish as well as a decorative one. A well-made aggregate slab with the right mix and a decent sealer shrugs off Toowoomba's temperature swings, from hot summer days to hard winter frosts, and the textured surface disguises the small imperfections that a smooth slab would put on show. Underneath it is still a properly engineered slab, footed and reinforced for the reactive black soil like any driveway out here.

How the Finish Is Made

Choosing the stone

Exposed aggregate is a normal reinforced slab with a decorative stone mix through it. The look comes down to the aggregate you pick: the colour of the stone, the size of the pebbles and the shade of the cement around them. A pale mix with quartz and lighter pebbles suits a modern build at Highfields and stays cooler underfoot in summer. Darker granite and river stone mixes read more solid and hide dirt even better, which suits an established home at Rangeville or Newtown. Your concreter can show you sample boards so you are choosing off the real thing rather than a photo.

Because the stone is what you see, the mix has to be spread and worked evenly through the pour so the finished surface is consistent and not blotchy. That is a skill, and it is where an experienced local crew earns their keep.

Concrete driveway leading up to a Toowoomba home

Washing back the surface

Once the slab is placed and levelled, the crew works the stone just below the surface and then removes the thin top layer of cement paste to reveal it. There are two common ways this is done. A surface retarder can be sprayed on so the top skin stays soft while the concrete underneath sets, then it is washed off the next day to expose the stone cleanly. On smaller jobs the surface can be washed back by hand with water and a brush at the right moment. Timing is everything with either method. Too early and you wash out the stone, too late and the paste has locked in. That window shifts with the weather in Toowoomba: a hot dry summer day dries the slab fast, while a cold winter day slows it right down, and reading it correctly is exactly the sort of local judgement that separates a clean finish from a patchy one.

Sealing and upkeep

Exposed aggregate is nearly always sealed once it has cured. The sealer deepens the colour of the stone, makes the surface easier to hose down, and adds a layer of protection against stains and the sun. In Toowoomba, where the surface cops strong summer sun and winter frost, the sealer gets topped up every few years to keep the finish looking rich rather than dry and dull. Your concreter will tell you which sealer suits your spot and how often to redo it. A slip-resistant additive can go into the sealer if you want extra grip on a steep drive.

Where It Works Best

Exposed aggregate earns its place in a few spots around Toowoomba in particular:

Steep Range-edge driveways. On the escarpment blocks at Rangeville, Redwood, Prince Henry Heights and Mount Lofty, the texture gives tyres and feet something to hold when the surface is wet or frosty.
Front driveways and entries. A decorative, hard-wearing finish that lifts the front of a home and hides marks, from Middle Ridge to Glenvale.
Paths and courtyards. It shrugs off daily foot traffic and dragged furniture far better than a smooth slab, and the grip helps on a frosty winter morning.
Alfresco and entertaining areas. It ties the outdoor living space to the driveway when the same aggregate runs through all of it.

If you want a decorative look without the full aggregate, coloured and stencilled finishes are worth a look, and if the job is a driveway first and a finish second, start with our concrete driveways page.

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Exposed Aggregate FAQs

Is exposed aggregate good for a steep, frosty driveway?

Yes, it is one of the reasons it is so popular on Toowoomba's Range-edge blocks. The stone stands slightly proud of the surface and gives tyres and bare feet grip when the drive is wet or touched with frost, where a smooth trowelled slab would be slippery. If you want extra security on a steep slope you can add a slip-resistant additive to the sealer.

Does exposed aggregate hold up to Toowoomba's frosts and heat?

A well-made aggregate slab holds up well through the temperature swings out here. It comes down to the same fundamentals as any good concrete: the right mix, enough cover over the reinforcement, correct footings for the black soil, and a good sealer kept topped up. The textured surface also hides the small marks that summer sun and general wear would show on a plain grey slab, so it tends to look better for longer.

How often does it need resealing?

Every few years is a fair guide, though a surface that cops full summer sun and winter frost may want it sooner. The sealer is what keeps the stone looking rich and makes the surface easy to hose down, so topping it up is the main upkeep. Your concreter will suggest a schedule based on where your slab is and how exposed it is.

Can I get exposed aggregate on an existing driveway?

Exposed aggregate is created in the pour itself, so it cannot simply be applied to an existing slab. If your current concrete is sound but tired, a decorative resurfacing overlay can give you a fresh look without a new pour. If you want the genuine aggregate finish, that means a new slab.

Do I still need council approval for an aggregate driveway?

The finish does not change the rules. The slab on your own land generally does not need approval, but the vehicular crossing where the driveway meets the road does need Toowoomba Regional Council approval to its own specification. Sort that out early with your concreter.

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