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Blackbutt Decking

Starting From Just $8.90

Please note that some suppliers sell other timber species under the name “Blackbutt.” These are not genuine Australian Blackbutt and may differ in colour, durability, and performance. Always confirm the source to ensure you are getting authentic Australian Blackbutt.

Blackbutt is a tough, reliable Australian hardwood that’s built for harsh Aussie conditions – strong sun, heavy foot traffic, and changeable weather. With a Janka rating of 9.1 kN and a BAL 29 fire rating, it meets the mark for both strength and bushfire compliance. At Greenhill Timbers, we supply Blackbutt Decking in 135 x 19 and 86 x 19 sizes, with competitive pricing that has made us a go-to for tradies and homeowners alike. If you’re after quality Blackbutt that won’t cost you extra, we’ve got you covered.

SKU: N/A Categories: , Size (mm): 130x19 Grades: Standard & Better Species: Blackbutt Length: 1.2m-4.8m Product Width: 135mm Product Width: 19mm Janka Rating: 9.1
Price by L/M

Product Description

A Decking Timber That’s Built to Last

Blackbutt timber decking is known for being dense, strong, and stable. It doesn’t move much once installed and holds its shape over time, even when exposed to the elements. The grain is mostly straight, with colour variations that range from pale cream through to light brown. It gives you a clean, modern finish without losing the warmth of natural timber.

Over time, it will naturally weather to a soft silver tone if left untreated, but if you prefer to maintain its golden colour, regular oiling will keep it looking sharp.

Fire-Rated and Termite-Resistant

With a BAL 29 fire rating, Blackbutt is one of the few Australian timbers approved for use in higher-risk bushfire zones. That makes it a smart option for decks built in suburban fringe areas or regional properties where fire compliance is essential. It also has a natural resistance to termites and decay, which means less long-term worry when it comes to structural integrity.

Whether it’s an exposed pool deck or a sheltered veranda, Blackbutt performs well in most outdoor settings when properly installed and maintained.

Explore Blackbutt Decking in 135 x 19, 86 x 19 Size Options

Despite its density, Blackbutt is relatively easy to work with using standard tools. It machines cleanly and takes fixings without much fuss. Just make sure to pre-drill, especially near board ends. Once it’s laid and finished, you’ll get a surface that holds up well to daily use, weather swings, and moisture changes.

At Greenhill Timbers, we offer:

  • Blackbutt Decking 135 x 19
  • Blackbutt Decking 86 x 19

Each board is kiln-dried for stability and supplied in select grades that meet our internal quality checks.

Stocked at Greenhill Timbers

Greenhill Timbers supplies genuine Australian Blackbutt decking, sourced and sorted to meet our standards. We keep it on hand in multiple sizes and lengths for trade customers, builders, and homeowners tackling anything from backyard decks to larger projects. If you’re unsure about quantities, sizes, or how to prep and finish your boards, our team can walk you through it.

Get in touch or visit us in store, we’re here to help you build something solid.

Janka Rating

What Is the Janka Rating?

The Janka rating is a way to measure how hard a timber is, specifically, how much force it takes to push a small steel ball halfway into the wood. The number you get is shown in kilonewtons (kN). A higher Janka score means a harder, more durable timber. Builders and floor installers use it to work out which timbers hold up better in busy areas.

Here’s a rough guide to how some timbers sit on the scale:

  • Brazilian Walnut – around 16.0 kN
  • Spotted Gum – roughly 11.0 kN
  • Tasmanian Oak – about 5.5 kN
  • Radiata Pine – close to 3.0 kN

Keep in mind: these values can vary depending on moisture content and grain direction.

It's One Part of the Decision

Hardness is useful to know, but it’s just one factor. Janka doesn’t tell you how a timber reacts to heat or humidity, how stable it is, or how easy it is to cut and install.

Some of the hardest woods can be difficult to work with. Others, even if softer, might be more stable or forgiving on-site.

At Greenhill Timbers, we look at the whole picture, not just the numbers. All our timbers are structurally graded and covered by a 25-year guarantee. We'll help you pick something that works for your project, not just on paper.

Delivery Options

Melbourne-Wide Delivery

We carefully prepare your order and organise pick-up or delivery that suits your schedule, ensuring your satisfaction when you choose to purchase from us. If you're located in Melbourne and its surrounding areas, you can collect your order from our Thomastown Showroom at 170 Settlement Road. Otherwise, we can facilitate delivery by leveraging our strong partnerships with various sub-contractors to get you the most competitive delivery rate and suitable time frame. For more information, get in touch with us.

Customer Reviews

Why Choose Us

Get Your Timber Packed

Get Your Timber Packed

We pack, wrap and load your products into your vehicle on-site. As a Green Hill customer, you won’t have to pack your timber or lug it into your vehicle after you’ve purchased it.

01
One Stop Shop

One Stop Shop

We are a one-stop shop for all your timber needs. Get dozens of types of wood, both imported and local, and the right cuts for your decking, flooring, cladding and fencing projects.

02
Competitive Pricing

Competitive Pricing

In most cases, we can help you save hundreds or even thousands of dollars on the same materials compared to other timber suppliers.

03
Expert Staff

Expert Staff

Our expert staff will assist you in finding the perfect timber to match your projects based on a relaxed chat to find what you need.

04
Transparent Quotes

Transparent Quotes

We give you the whole picture when we quote you. So you can avoid any nasty surprises down the line.

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