For composite decking vs timber adelaide comparisons in 2026, composite is the better long-term choice for most homeowners. It handles our UV-heavy climate without the constant upkeep timber needs. Composite decking costs $150–$350 per square metre installed, compared to $100–$250 per square metre for timber. Timber is cheaper to install and gives that classic look, but it needs oiling or staining every 12–18 months or it greys and cracks in the Adelaide sun. Composite costs more upfront but needs almost no maintenance and typically lasts 25–30 years without fading. If you want a deck you can leave alone for decades, choose composite. If upfront cost matters more than maintenance, timber still works in 2026.
2026 Price Comparison: Composite vs Timber Decking in Adelaide
When you compare composite decking vs timber in Adelaide on price alone, timber looks cheaper — but the full picture includes upkeep costs too. In 2026, composite decking in Adelaide costs $150–$350 per square metre installed, while timber decking costs $100–$250 per square metre. The exact price depends on the timber species (merbau costs more than treated pine) and the composite brand and board profile you choose. Here’s how the two stack up side by side:
| Material | Price per sqm installed (2026) | Expected lifespan | Maintenance |
|---|---|---|---|
| Composite decking | $150–$350 | 25–30 years | Occasional wash, no oiling |
| Timber decking | $100–$250 | 15–20 years (with maintenance) | Oil or stain every 12–18 months |
Which Lasts Longer in Adelaide’s Climate?
Adelaide gets some of the harshest UV exposure in the country, and that matters more for decking than almost any other building material. Timber decking needs oiling or staining every 12 to 18 months to stop it greying, cracking, and splintering in the sun. Skip a season and you’ll notice it. Composite decking is made from recycled wood fibre and plastic, so it doesn’t need oiling at all. A wash with soapy water once or twice a year keeps it looking right. Well-maintained timber can last 15 to 20 years in Adelaide conditions. Composite typically lasts 25 to 30 years with barely any upkeep. That’s why most homeowners weighing up long-term cost land on composite, even though it costs more to install.
Bushfire Zone Rules: Can You Even Use Timber?
If your property is in a designated bushfire-prone area, this decision might already be made for you. Under South Australian building rules, homes in higher Bushfire Attack Level (BAL) zones face limits on timber decking. In BAL-29 zones and above, untreated timber generally can’t be used within a certain distance of the building. Composite decking with the right fire rating is often the only compliant option in these zones. Before you commit to timber, check your BAL rating with your council, your builder, or the South Australian Country Fire Service. Your BAL rating can rule out timber altogether, regardless of which material you’d prefer.
Composite Decking vs Timber: Which Looks Better in Adelaide?
Timber still wins on natural warmth. Merbau and spotted gum have a colour and grain that composite hasn’t fully replicated, and plenty of Adelaide homeowners choose timber for that reason alone. But composite has closed the gap. Modern composite boards come in wood-look finishes with real grain texture. Because the colour runs through the board rather than sitting on top, it doesn’t fade or bleach out the way timber does after a few Adelaide summers. If you want low-maintenance and don’t mind a slightly more uniform look, composite is the better pick. If the natural material matters more to you than the upkeep, timber is still a good option in 2026.
SAQHI Decking Adelaide
SAQHI has installed decking for Adelaide homeowners for years, in both composite and timber. We’re licensed and insured, and every quote is free. Whether you want a low-maintenance composite deck built to last 25-plus years, or a classic timber deck done right for our climate, we’ll walk you through real costs and timeframes before you commit. We service Adelaide metro and Port Pirie. If you’re weighing up composite decking vs timber for your own place, get in touch for a free quote and we’ll help you land on the right call for your block.
Frequently asked questions
For most Adelaide homeowners, yes — composite decking handles UV exposure and humidity swings better than timber, needing almost no maintenance over its 25–30 year lifespan. Timber costs less upfront ($100–$250/sqm vs $150–$350/sqm for composite) and has a warmer, natural look, but needs oiling every 12–18 months. If low maintenance matters most, composite is the better long-term choice.
Composite decking installed in Adelaide costs $150 to $350 per square metre in 2026, depending on the board brand, colour, and substructure. Premium composite brands with longer warranties sit at the top of that range. Get a free quote from SAQHI for an exact price based on your deck size and design.
It depends on your Bushfire Attack Level (BAL) rating. In higher-risk zones — generally BAL-29 and above — South Australian building rules restrict or ban untreated timber decking near the home. Composite decking with an appropriate fire rating is often required instead. Check your BAL rating with your council before choosing a material.
Composite decking typically lasts 25 to 30 years with minimal upkeep — just an occasional wash. Timber decking lasts 15 to 20 years in Adelaide conditions, but only if it’s oiled or stained every 12 to 18 months. Skip the maintenance and timber will deteriorate much faster.
Composite decking can get hotter underfoot than timber on direct-sun days, especially darker colours, because it absorbs heat rather than breathing like natural wood. Choosing a lighter colour composite board reduces this. Timber generally stays cooler, but check with your installer about heat-reflective composite ranges if this is a concern for bare feet around the pool.
Ready to Compare Composite Decking and Timber?
When it comes to composite decking vs timber adelaide, the right choice comes down to your budget, how much upkeep you’re willing to do, and whether your property falls in a bushfire zone. Get a free, no-obligation quote from SAQHI and we’ll help you compare both options properly for your Adelaide home.