Can You Leave Merbau Decking Untreated in Australia?
Merbau decking is one of Australia’s most loved hardwood options for outdoor spaces. Known for its rich, reddish-brown hue and impressive durability, it’s commonly used across patios, pool areas, and alfresco zones. But one common question homeowners ask is, “Can I leave Merbau decking untreated?”
The short answer: you can, but you shouldn’t. While Merbau is naturally strong and resistant to decay, Australia’s harsh climate can take its toll over time. If you want your deck to stay beautiful and last for decades, proper treatment and maintenance are essential.
Let’s explore why. Understanding Untreated Merbau Decking
Untreated Merbau decking boards refer to timber that hasn’t been oiled, sealed, or stained after installation. When left exposed, the wood will weather naturally — turning a silver-grey shade over time. Some homeowners like this rustic, aged look, but there are several downsides:
- Fading & Discolouration: The vibrant Merbau colour fades quickly under UV rays.
- Surface Damage: Without oiling, the deck becomes more prone to cracking and drying.
- Moisture Problems: Rain and humidity can lead to swelling, mould, and mildew.
- Tannin Bleed: Untreated Merbau releases natural oils and tannins that can stain nearby surfaces.
In short, untreated Merbau decking may look fine for a short period, but without protection, it loses both its beauty and longevity.
Why Treating Merbau Decking Matters
If you’re investing in Merbau decking Melbourne, you’re likely doing it to enhance your outdoor lifestyle — not to replace it every few years. Oiling and sealing your deck has several long-term benefits:
- Preserves Colour: Keeps that deep, rich tone that makes Merbau so appealing.
- Protects Against UV Damage: Reduces cracking and fading from the intense Australian sun.
- Repels Moisture: Prevents warping, swelling, and decay caused by rain or humidity.
- Easier Cleaning: A sealed surface resists dirt, tannin stains, and mould.
Choosing the Right Merbau Decking Size
The size of your decking boards affects both aesthetics and maintenance:
- Buy Merbau Decking 140×19 – Wide, premium boards ideal for large entertaining areas.
- Buy Merbau Decking 90×19 Price – A popular, cost-effective option for most residential decks.
- Buy Merbau Decking 70×19 – Narrow boards, perfect for small patios or detailed designs.
Each size offers a different visual appeal and budget flexibility. If you’re comparing Merbau decking Melbourne prices, remember that wider boards tend to cost more per linear metre but require fewer joins and faster installation.
Merbau Decking Melbourne Prices
Prices depend on size, quality, and supplier, but you can expect general price tiers like:
- Merbau Decking 70×19: Budget-friendly, great for smaller areas.
- Merbau Decking 90×19 Price: Mid-range, offering the best value for money.
- Merbau Decking 140×19: Premium look with a higher price tag, ideal for luxury decks.
Always buy from trusted local suppliers of Merbau decking Melbourne to ensure quality timber that’s sustainably sourced and properly kiln-dried for Australian conditions.
How to Protect Your Merbau Decking
If you decide not to leave it untreated, here’s a simple care routine:
- Clean Before Oiling: Remove dirt, debris, and tannins using a deck cleaner.
- Apply Decking Oil: Use a high-quality penetrating oil designed for hardwoods.
- Reapply Regularly: Every 6–12 months, depending on exposure.
- Maintain Consistency: Avoid letting areas dry out unevenly — consistent care ensures even colour and texture.
Final Thoughts
While it’s technically possible to leave Merbau decking untreated in Australia, it’s not recommended. The intense UV rays, heavy rains, and changing temperatures will quickly weather the timber and shorten its lifespan.
For homeowners in Melbourne, investing a little time and effort into oiling and sealing your Merbau decking Melbourne ensures long-lasting beauty and durability. Whether you choose Merbau Decking 140×19, Merbau Decking 90×19, or Merbau Decking 70×19, protecting your deck is key to maintaining its premium look for years to come.
By comparing Merbau decking Melbourne prices and following proper maintenance, you’ll enjoy a deck that enhances your home’s outdoor appeal — season after season.