Merbau Decking Timber: Pros & Cons For Decking

What is Merbau Timber?

Merbau timber, scientifically known as Intsia bijuga, is a hardwood timber that is renowned for its remarkable durability and striking beauty. This type of wood showcases a deep, reddish-brown colour and a distinctive yellow fleck that runs through the grain, which, when polished, imparts a radiant glow.

Where Does Merbau Timber Come From?

Merbau Timber is primarily found in the Indo-Pacific region, specifically in countries such as Malaysia, Indonesia, Philippines, and Papua New Guinea. It's also grown in the tropical regions of Northern Queensland, Australia. This tree can reach a height of 50 metres and is harvested extensively for its timber.

What is Merbau Timber Used for?

Merbau Timber is known for its versatility and is used for a wide range of applications. Its inherent strength and durability make it an ideal choice for outdoor furniture, flooring, and decking. It is also used for making musical instruments, boat building, and in the creation of joinery, staircases, and tool handles.

What Colour Is Merbau Timber?

Merbau timber is known for its rich, reddish-brown colour that deepens over time.

This distinct hue adds warmth and sophistication to any outdoor space, making it a popular choice for decking projects.

The natural beauty of merbau timber is enhanced by its prominent grain patterns and smooth finish, creating a stunning visual appeal that will complement any design style.

Why is Merbau Timber Good for Decking?

Merbau timber is a preferred choice for timber decking for several reasons:

1. Durability: Merbau is one of the most durable timbers available. It's resistant to decay, fungi, and termites, making it perfect for outdoor applications like decking.
2. Aesthetics: It's deep, rich, reddish-brown hue makes it a visually appealing choice. Its unique grain pattern adds to its aesthetic appeal.
3. Strength: Merbau timber has a high degree of hardness, which makes it resistant to scratches and dents.
4. Workability: Despite its hardness, Merbau is relatively easy to work with. It can be easily cut, glued, and nailed without any significant difficulty.
5. Natural oil content: Merbau timber has a high oil content. This not only enhances its durability but also provides a natural sheen to the finished product.

How Long Does Merbau Decking Last?

With proper maintenance and care, Merbau decking can last for decades, providing a beautiful and functional surface for enjoying the outdoors.

The natural oils in Merbau timber help to protect it from rot, decay, and insect damage, further extending its lifespan. Regular cleaning and sealing can also help to prolong the life of Merbau decking, ensuring that it remains a stunning addition to any home or commercial property for years to come.

Merbau Deck Ideas

A Merbau timber deck in Australia can look stunning, as these modern ideas and inspiration show!

Clearly, Merbau timber, with its inherent beauty and strength, is a fantastic choice for decking. However, as with any major project, it's crucial to weigh the pros and cons before making a decision.

The Cons of Using Merbau Timber for Decking

While Merbau timber is a popular choice for decking due to its many advantages, it's important to also consider some of the potential drawbacks. Here are a few things to bear in mind:

1. Tannin Leaching: Merbau timber is known to leach a dark tannin when wet, which can result in staining on surrounding surfaces. This can be particularly problematic for light-coloured paving or concrete.
2. Environmental Impact: Merbau timber is often sourced from countries where logging is causing serious environmental damage, including deforestation and habitat destruction. While there are certified sustainable sources of Merbau, it's crucial to ensure that any timber you purchase comes from a responsible supplier.
3. Cost: Merbau is generally more expensive than some other decking options, such as treated pine. This cost can be a significant factor, especially for larger decking projects.
4. Heat Retention: Like most dark-coloured materials, Merbau can retain a significant amount of heat when exposed to the sun. This can make the decking uncomfortably hot to walk on during summer.
5. Variability: As a natural material, Merbau can vary significantly in colour and grain pattern. While some people enjoy this uniqueness, others may prefer a more consistent look.
6. Maintenance: Finally, while Merbau is naturally resistant to decay and pests, it still requires regular maintenance to keep it looking its best. This can include oiling or staining to preserve the timber's colour and protect it from the elements.

Which leads us on to how to maintain your merbau timber deck!

How To Maintain Merbau Timber

Maintaining Merbau timber is essential to ensure its longevity and keep it looking its best. Here is a step-by-step guide to help you:

1. Cleaning

  Regular cleaning is the first step to maintaining your Merbau timber. Use a brush to remove any dust and debris, and wash with a mild detergent and warm water to remove any grime or stains. Rinse thoroughly and let it dry completely.

2. Reapply Tannin Solution (If Required)

  As Merbau timber is prone to leaching tannins when wet, it is recommended to initially apply a tannin cleaning solution to new Merbau timber. This helps to draw out the tannins and should be followed by thorough rinsing and drying.

3. Regular Oil Treatment

  Merbau timber has a natural oil content, but it is beneficial to apply a good quality decking oil every 6-12 months. The oil not only enhances the natural colour of the timber but also provides extra protection against the elements. Before applying oil, ensure the timber is clean and completely dry.

  Note: Always follow the manufacturer's instructions when applying decking oil.

4. Regular Inspections

  Regularly inspect your Merbau timber for any signs of damage or decay. Small issues can be addressed promptly before they turn into bigger problems.

5. Avoid Direct Contact with Metal

  Merbau timber can react with certain metals, causing unsightly black stains. Where possible, use plastic or rubber pads between the timber and any metal objects.

6. Cover During Harsh Weather

If possible, cover your Merbau timber during extreme weather conditions to protect it from potential damage. This means that merbau decking is usually best under covered areas.

Regular care is the key to preserving the life and appearance of your Merbau timber.

In conclusion, while Merbau timber has many advantages, it's important to consider these potential drawbacks when planning your decking project. Remember, the best decking material for you will depend on your specific needs, budget, and personal preferences. At Directline Timber, we're always happy to help with any questions you might have for your timber projects on the Sunshine Coast.

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