Exposed aggregate concrete showing the stone washed clear of the cement
Aggregate and Stone

Aggregate and Stone Options

The stone you choose changes more than the colour does. It decides whether the surface grips on a wet slope, whether it is comfortable in bare feet, and how it looks after a Launceston winter. Here is what actually changes, so you can pick it on purpose rather than off a photo.

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The Stone Is the Decision, Not the Colour

People come to us with a colour in mind and leave having changed the stone. The stone decides how the surface feels underfoot, how much grip it has, how well it hides a stain and what it costs. The colour sits on top of that.

Three things change independently. Size is how big the stone is. Exposure is how far the cement is washed back off the top of it. Blend is which stone, and therefore the colour. The same blend at two sizes will not look like the same driveway.

The first choice

Stone Size, and What It Changes Underfoot

Aggregate comes in a handful of sizes and they are not interchangeable. The drawing below is to scale, so you can see the difference before you stand on it.

7mmFine
10mmThe usual
14mmChunky
20mmFeature

Drawn to scale, not photographed. A 20mm stone is roughly three times the width of a 7mm one, which is why the two feel nothing alike.

7mm, the Fine Blend

Smooth enough to walk on barefoot and the easiest to keep clean, because there is less depth for grit to sit in. It is the one to use around a pool or on a patio. It shows a stain more readily than the bigger sizes, simply because there is more cement on show.

10mm, What Most People Choose

The default for a driveway and the size most of our jobs are poured in. Enough texture to grip a wet slope, not so much that it is unpleasant underfoot or hard to sweep. If you are not sure, start here.

14mm, When You Want to See the Stone

The stone reads as individual stones rather than a texture. It suits a long driveway where a finer blend would look flat from a distance. It is harder work to sweep and a dropped earring is gone.

20mm, a Feature Rather Than a Surface

Big rounded stone with real cement showing between it. It looks deliberate in an entry strip or a border, and it is tiring underfoot across a whole driveway. Very few residential jobs are poured entirely in it.

The stone itself

River Gravel Through to Basalt and Marble

Size and exposure decide how the surface behaves. Which stone decides what it looks like. These are the five families we pour most often in Launceston, and each one is a different answer.

River Gravel exposed aggregate concrete, rounded, water worn
River GravelRounded, water wornThe warm one. Smooth rounded stone in honey, tan and soft grey, and the most forgiving underfoot because nothing is sharp. It is what most people picture when they think of an aggregate driveway.
Granite exposed aggregate concrete, speckled and neutral
GraniteSpeckled and neutralAngular crushed stone, mid grey with black and white flecks through each piece. It reads neutral against almost any house colour, so it is the safe pick when the render or brick is unusual.
Basalt exposed aggregate concrete, dark and deliberate
BasaltDark and deliberateCrushed volcanic rock, charcoal to near black. Sharp and modern, and it hides tyre marks better than anything else. It also holds heat, so think twice next to a pool.
Quartz exposed aggregate concrete, bright, with a glint
QuartzBright, with a glintMilky white and pale honey chips that catch the light at the edges. It lifts a shaded area, and it is the one people choose when they want the surface to look expensive rather than practical.
Marble exposed aggregate concrete, the pale end
MarbleThe pale endBright white crushed marble in a near white cement. The lightest surface we pour and the coolest in summer. It also shows a leaf stain and an oil drip fastest, so it wants a spot away from trees and traffic.

Surface references, not photographs of finished jobs. Stone from the same family varies between loads, and we bring physical samples to the measure so you choose off the real thing.

The second choice

How Far Back It Gets Washed

Exposed aggregate is ordinary concrete with the cement washed off the top while it is still green. How long we leave it before washing decides how much stone you end up looking at, and it is judged on the day, on your slab.

Light Etch

Barely washed. You see the top of the stone through a thin skin of cement, and the surface reads as speckled concrete rather than a stone one. Smoothest underfoot, least grip, easiest to keep looking clean.

Standard Exposure

The top third of each stone stands clear. This is what most people picture when they say exposed aggregate, and it is what we pour unless you ask otherwise. It grips, it hides marks, and it still sweeps.

Deep Wash

Washed back until the stone stands well proud and the cement sits down between. Maximum grip and maximum texture. The right answer on a steep drive and the wrong one on a patio you walk on barefoot.

This is the part that cannot be chosen off a screen. What we can do is show you a light etch and a deep wash on the same blend at the measure, so you are picking between two things you have actually held.

Where it is going

Grip, Bare Feet and Pool Surrounds

The same surface is a good answer in one place and a poor one three metres away. Nearly every regret we hear about is a surface chosen for how it looked rather than where it was going.

WhereWhat we would pourWhy
Around a pool7mm, light etchBare feet and grip both matter, and a pale stone stays cooler in full sun.
Driveway on a slope10mm, deeper washWet concrete on a grade is where people slip. The extra texture is worth the extra sweeping.
Path on the shady side10mm, light etchThat side stays damp and grows moss. Less texture is less to scrub.
Patio you will sit on7mm, light etchChairs scrape and tables need to sit level. A deep wash makes both worse than you would expect.
Local conditions

What a Launceston Winter Does to It

Most of what is written about exposed aggregate online is written for Perth or Queensland. Launceston is colder and wetter, and a couple of things behave differently here.

Frost and the Surface

Properly poured and cured concrete handles Launceston frost without trouble. What frost does do is make a slick surface slicker on a winter morning, which is another argument for texture on anything sloped.

Moss on the Shady Side

The realistic maintenance job here is not the concrete failing, it is green growth where the ground stays damp. A hose and a stiff broom once or twice a year handles it, and a sealer makes that easier rather than unnecessary.

Leaf Stain

Wet leaves left on a pale surface through autumn will mark it. It is worse on a fine pale blend than on a mid grey, which is a real reason to look at a mid tone if your drive sits under deciduous trees.
Once the stone is settled

Where the Colour Comes In

Size and exposure decide how the surface behaves. Only then is it worth looking at which blend, because a blend you love at 7mm is a different surface at 14mm.

The Full Blend Range

Sixty-two blends across exposed aggregate, honed, polished and liquid limestone. See the colour range.

How It Is Poured

The method, what it costs in Launceston and where it suits. Exposed aggregate.

If You Want It Smoother

Honed is the same stone ground flat instead of washed back. Honed concrete.

The Next Step

Get a Price With the Right Stone in It

Tell us the area and where it is going, a driveway, a path, around a pool. We come out, measure it properly and bring samples so you can see the stone before you commit. The written price is free either way.

Free Measure & Quote
Tell us what you need and we'll have a look.

What Happens After You Send It

  • We come out and measure it, free, and look at the ground and the access.
  • You get one written price for the whole job, not a rate per square metre.
  • If you go ahead, you get a start date and the same crew from quote to pour.

Would rather talk it through? (03) 6724 3698, or send the details through the contact page.

Coloured Concrete Across Launceston

  • Kings Meadows
  • Newstead
  • Norwood
  • Prospect
  • Riverside
  • Trevallyn
  • West Launceston
  • East Launceston
  • South Launceston
  • Youngtown
  • St Leonards
  • Mowbray

Plus the wider Launceston area.

Common Questions

Stone and Aggregate Questions We Get Asked

What size aggregate should I use for a driveway?

10mm for most Launceston driveways. It grips when wet, it is comfortable to walk on and it sweeps. Go to 14mm if the drive is long and you want the stone to read from a distance, and down to 7mm if the same concrete continues to a patio or a pool surround.

Is a bigger stone more expensive?

Not by much on its own. What moves the price is the blend you choose and the total area, not the stone size. We will tell you at the measure if the size you are after changes the number.

Can I have different stone in different parts of the job?

Yes, and it often makes sense. A fine blend around the pool and a 10mm on the driveway is a common split. It means separate pours, so it is worth raising at the measure rather than on the day.

How do I know what the exposure will look like?

We bring samples showing a light etch and a deeper wash on the same blend, so you are choosing between two surfaces you have held. The final call is made on your slab on the day, because timing decides it.

Does exposed aggregate get slippery in a Launceston winter?

Less than a smooth trowelled finish, which is one of the reasons people choose it. A deeper wash on anything sloped gives you more again. Frost on any hard surface is still frost, so texture helps rather than solves.

Will moss grow on it?

On the shady damp side of a house, eventually, the same as it does on pavers and brick. A hose and a stiff broom once or twice a year keeps it off. Textured surfaces hold it a little more than smooth ones.

Free Measure, Fixed Price

Find Out What Your Job Costs

One call and we come out, measure the real thing and put a price in writing. It costs nothing and there is no salesman in it.

One call. We measure it and put a fixed price in writing. Costs nothing.

(03) 6724 3698 Ask for a free measure
  • We come and measure itOn site, tape out, so the price is for your job and not a guess off a photo.
  • A fixed written priceOne number you can hold us to. Not a range, not a rate, not an estimate.
  • The crew who quotes it pours itThe bloke standing in your driveway is the bloke who does the work. Who you are dealing with.
  • Measured on site, not guessed
  • Fixed written price, not a range
  • The crew who quotes it pours it

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