When it comes to upgrading your outdoor space, choosing the right decking material is one of the biggest decisions you’ll make. For Australian homeowners, Merbau decking andcomposite decking are two of the most popular options—each offering distinct advantages in terms of durability, aesthetics, maintenance and cost. Whether you’re building a backyard entertainment area in Clyde or giving your deck in Cranbourne a facelift, it’s important to weigh your options carefully.
This guide will walk you through the pros and cons of Merbau timber decking and composite wood decks, helping you decide which is best for your home, climate and lifestyle.
Natural Appeal vs Engineered Ease
Merbau decking is loved for its deep, reddish-brown tones and natural grain, which ages beautifully over time. As a dense hardwood, it’s naturally resistant to termites and decay, making it well-suited to Australia’s climate. Many homeowners appreciate the warm, earthy character that a Merbau deck brings to a backyard, especially when paired with native landscaping or timber fencing.
However, Merbau timber decking isn’t completely maintenance-free. To keep it looking its best, you’ll need to seal or oil it regularly. Left untreated, Merbau can lose its colour or bleed tannins that stain nearby surfaces. Still, many prefer the charm of real wood and are happy to maintain it.
By contrast, composite decking is engineered from a mix of wood fibres and recycled plastic, offering a sleek, consistent look with minimal effort. Composite lumber decking doesn’t fade, splinter or warp and resists termites without any need for chemical treatments. It’s ideal for homeowners who want a great-looking deck without ongoing upkeep.
Durability, Maintenance and Climate Performance
In the battle of long-term durability, composite wood for decks often takes the lead. It’s designed to withstand the harsh Australian sun, fluctuating temperatures and heavy foot traffic—all without rotting or cracking. The protective shell on many composite decking boards prevents moisture from penetrating, making them a solid choice for wetter climates or poolside areas.
While Merbau decking performs well in heat and is incredibly strong, it is still a natural material. This means it’s more susceptible to moisture damage if not maintained properly. A well-kept Merbau deck can last for decades, but it does require consistent care to prevent issues like greying, mold or shrinkage.
On the maintenance front, composite lumber decking wins hands down. Occasional sweeping and a hose-down is usually enough to keep it looking fresh, whereas Merbau timber decking may need sanding, staining, and sealing annually.
Environmental Impact and Cost Considerations
Another factor to consider is sustainability. Merbau decking—if not ethically sourced—can contribute to deforestation concerns. At Auswood, we always recommend choosing certified sustainable timber if you opt for Merbau. Meanwhile, composite decking is often made from recycled materials, making it a more eco-conscious choice for environmentally minded homeowners.
In terms of cost, Merbau timber decking tends to be cheaper upfront. However, over time, maintenance expenses can add up. Composite decking may be more expensive initially, but the low-maintenance nature means you’ll save on ongoing upkeep and labour.
The decision ultimately comes down to what matters most to you: the natural beauty and feel of timber or the long-term savings and convenience of composite wood for decks.
Are you unsure which decking material is right for your outdoor project? Contact Auswood Timber & Hardware for personalised advice and competitive pricing on Merbau decking and composite decking. Our expert team is here to help you create a functional, stunning outdoor space that suits your needs and budget.Request a quote today or browse our decking range online.
Let’s build something beautiful—right here in South-East Melbourne.
