Choosing a Geostone colour blend for your home

One of the best parts of choosing exposed aggregate over plain concrete is that you actually get to pick a look. Geostone, made by Holcim, is one of the most widely used exposed aggregate ranges in Australia, and CJH Concrete pours a number of their blends including Jacaranda, alongside ranges from the other major suppliers. This post walks through how to think about choosing a blend for your driveway, alfresco or path, without needing to be a concrete expert to make a good decision.

Start with your house, not the sample chip

A sample chip in bright light at a display looks different once it is a full driveway sitting under your eaves in Perth sun. Before you fall for a colour, walk your own property and look at:

• Roof colour: dark roofs pair well with lighter or mid-tone aggregate; light roofs can handle darker blends without the whole facade going heavy.
• Brick or render colour: warm brick tones (reds, oranges, tans) generally sit better with warmer aggregate blends. Cooler render (greys, whites, charcoals) usually pairs with cooler stone tones.
• Window frames and garage door: black or charcoal frames are common on newer Perth builds and tend to look sharp against a mid-to-dark aggregate blend rather than something very pale.

The goal is a driveway that looks like it belongs to the house, not one that was chosen in isolation.

Broad blend families to think about

Without getting into exact product codes, exposed aggregate blends generally fall into a few broad colour families:

Warm and earthy. Blends with browns, tans and warm greys running through them. These suit brick homes, homes with warm timber accents, and anywhere you want the driveway to feel grounded rather than stark. Jacaranda sits in this family, with a warm, natural stone look that works well against Perth’s red-brick and render homes.

Neutral grey. Balanced blends that read as a classic, understated grey rather than pure white concrete. These are the safest choice if you are not sure and want something that will not fight with any future changes to paint colour or landscaping.

Cool and charcoal. Darker blends with more black and charcoal stone through them. These suit modern homes with black window frames, charcoal roofs and minimal, monochrome colour schemes. They show dust and pollen less obviously in some cases, but darker surfaces can run a little warmer underfoot in direct summer sun.

We will talk through the actual blend options and show physical samples on site during your quote, because a photo on a screen is never a reliable way to pick a colour that will sit on your driveway for the next twenty years.

Practical things that matter as much as colour

Consistency across the batch. A good pour has an even, consistent scatter of aggregate across the whole slab. This comes down to the mix and the skill of the crew placing and washing it back, not just which blend you pick.

Matching existing work. If you are extending an existing exposed aggregate driveway or path, matching the original blend closely matters more than picking your favourite new colour. We can help identify what is likely already down and find the closest current match.

Sealed vs unsealed. Sealing an exposed aggregate surface deepens the colour and makes it easier to keep clean, but it is a separate decision from which blend you choose. Ask about sealing options for your specific driveway or alfresco area.

Sun and glare. Perth gets a lot of direct sun. Very pale blends can throw noticeable glare off a driveway in the middle of the day. If your driveway faces west or gets full sun most of the day, a mid-tone blend is often more comfortable to look at and walk on than something very light.

How to actually compare blends before you decide

A few practical steps make choosing a blend far less stressful than staring at a brochure and guessing.

Look at sample boards in daylight, not indoors. Aggregate colour reads differently under artificial light than it does outside in Perth’s sun. A blend that looks perfect in a showroom can look noticeably different once it is a full slab in your driveway.

Ask to see a finished example nearby. If we have poured a similar blend on a house in your area, seeing it in person, weathered in and under real conditions, tells you far more than a small sample chip ever will.

Think about long-term maintenance, not just day one. Every exposed aggregate surface will collect some dust, leaf litter and general wear over the years. Mid-tone blends tend to hide this better between cleans than very pale or very dark options, which is worth factoring in if you are not the type to hose the driveway down every week.

Consider how the blend ages. Aggregate does not change colour dramatically over time the way some coloured concrete or pavers can fade, but sealing, general wear and weathering do soften the initial contrast slightly. A blend chosen for its bold day-one look should still read well a decade later, not just in the first few months.

Talking it through with your concreter

Choosing a blend is not something you need to get right entirely on your own. Part of a proper quote and consultation is talking through what has worked well on similar homes, what tends to age well in Perth conditions, and what suits the specific area of your property, whether that is a full driveway, a smaller path or an alfresco. Bring photos of your house, your fence, and anything else nearby that the new concrete needs to sit alongside, and we can narrow the options down from there rather than starting from scratch.

Where blend choice matters most

Different areas of a home suit different approaches:

• Driveways benefit from a blend that hides everyday dust, tyre marks and the odd oil drip, so mid-tone and warm blends tend to perform better long-term than very pale ones. See our driveways page for more.
• Alfresco and pool surrounds are seen up close and barefoot, so texture and heat underfoot matter as much as colour. A slightly finer aggregate scatter can feel better underfoot than a coarse driveway-style mix.
• Paths and side access are usually smaller areas, which means you can afford a slightly bolder or darker blend without it dominating the whole property.

See it before you commit

Photos and web pages only get you so far with a decision like this. Have a look through our gallery for real examples of different blends poured across Perth’s northern suburbs, then book a free measure and quote so we can bring physical samples to your actual driveway or alfresco and see how they read in your own light.

Call 0476 722 330 or reach out through contact to get a blend recommendation specific to your home.