Silvertop Ash Decking

Starting From Just $8.95

SKU: GHT-6479 Categories: , Brand: Species: Eucalyptus Profile: DAR Product Width: 135mm & 86mm Janka Rating: 9.7
Price by L/M

Silvertop Ash decking in 86 × 19 mm and 135 × 19 mm: a pale Australian hardwood with Janka hardness 9.7 kN and Class 2 durability above ground, rated for bushfire decking up to BAL-19 at this 19 mm thickness.

  • Sizes: 86 × 19 mm and 135 × 19 mm
  • Timber: Silvertop Ash (Eucalyptus sieberi), grown in NSW, eastern Victoria and north-east Tasmania; pale brown, sometimes with a pink tinge; about 820–850 kg/m³
  • Durability: Class 2 above ground, which the Queensland Government rates at 15–40 years’ expected life
  • Termites: the Queensland Government lists Silvertop Ash heartwood as not termite resistant, so keep the subframe termite-protected
  • Movement: it has the highest shrinkage of our decking species, so keep to the recommended gaps and seal every face
  • Bushfire: our 19 mm Silvertop Ash is rated for decking up to BAL-19; BAL-29 needs a thicker 22 mm board. For BAL-29 in 19 mm, choose Spotted Gum, Blackbutt or Merbau
  • Joist spacing: 450 mm centres, as WoodSolutions recommends for decking; its deck design guide allows up to 500 mm for 19 mm hardwood, or 350 mm if the boards run at 45°
  • Gaps: 3–4 mm between 86 mm boards and 4–5 mm between 135 mm boards at installation (WoodSolutions deck design guide)
  • How much for a deck: a 20 m² deck needs about 140 lineal metres of 135 mm board or about 225 lineal metres of 86 mm, plus about 10% for offcuts
  • Low decks: under 400 mm off the ground, WoodSolutions suggests 5–6 mm gaps and at least 40 mm between the deck and the house, for airflow
  • Fixing: two fixings per board at every joist, at least 12 mm from edges and ends. Pre-drill this dense hardwood. Use stainless steel within 1 km of the coast or 1 m of a pool. See our decking screws
  • Finishing: coat every face and cut end, ideally before fixing, then recoat at least once a year or as the oil maker directs (WoodSolutions); left bare, it weathers to silver-grey. Oils we stock: CUTEK CD50, Intergrain Universal Timber Oil or Sceney’s Timber Decking Oil
  • At Greenhill: stocked at 170 Settlement Road, Thomastown, with pickup or delivery across Melbourne and regional Victoria. Compare species on our hardwood decking page.

Product Description

Why Choose Silvertop Ash Decking?

Silvertop Ash might lack visual flair, yet this quality is what makes it so attractive. It features a straight grain with hues ranging from light blonde to soft brown, offering a clean and understated finish. It harmonizes well with both traditional homes and modern constructions, particularly when aiming for a simple aesthetic.

Over time, it gracefully weathers to a grey shade, or you can enhance its color with oil or stain for a deeper hue. Regardless of your choice, it remains stable over time. Unlike some foreign hardwoods, it resists cupping or splitting when properly installed and maintained.

Built to Cope With the Outdoors

This wood withstands weather conditions effectively. Experts rate it as Class 2 for above-ground durability. This means it can last for many decades outdoors with regular care. Its heartwood is not rated termite resistant, so keep the subframe termite-protected.

Silvertop Ash Timber Decking meets BAL 19 standards. This makes it suitable for building in areas with a moderate bushfire risk. BAL-29 needs a thicker 22 mm board. It is still a good option for many building projects in suburban and rural areas.

Size Options for Your Diverse Needs: 86 x 19, 135 x 19

One of the things that makes Silvertop Ash so widely used is that it’s easy to work with. It machines well, takes fixings cleanly, and holds its shape once it’s down. Pre-drilling is always a good idea, especially near board ends, but you won’t be fighting with it like you might with denser timbers.

We supply two standard decking sizes at Greenhill Timbers:

  • Silvertop Ash 86×19 Decking
  • Silvertop Ash 135×19 Decking

Each board is kiln-dried, end-matched, and ready for installation. Whether you’re covering a large entertaining area or patching in a section of an older deck, the sizing is flexible enough to suit.

Supplied by Greenhill Timbers

At Greenhill Timbers, we’ve been supplying quality hardwood decking to Melbourne’s trades and homeowners for years. Silvertop Ash is one of those timbers we keep in stock for a reason; it’s dependable, affordable, and works across a wide range of outdoor builds.

If you’re planning a decking job and want advice on sizing, spacing, or maintenance, feel free to speak with our team. We can help you find what will fit your space and budget. Our friendly staff is always ready to help you choose the right materials for your project. Whether you’re a seasoned builder or a DIY enthusiast, we understand that every decking project is unique. That’s why we take the time to listen to your needs and provide tailored recommendations.

We offer Silvertop Ash and many other hardwood options. Each type has its own unique features and benefits. From the rich hues of Merbau to the durability of Spotted Gum, you can find the perfect timber to match your style and requirements.

Once you pick your decking material, we can help you with installation tips for a lasting finish. Good spacing and alignment are important for looks and function. Our team can share tips to help you get a professional look.

Don’t forget about maintenance! We can provide you with information on the best products and practices to keep your deck looking great for years to come. Regular cleaning and occasional oiling can make a significant difference in the longevity of your timber.

At Greenhill Timbers, we pride ourselves on our commitment to quality and customer satisfaction. Visit us today to explore our range of hardwood decking options and let us help you create the outdoor space of your dreams.

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Janka Rating

Silvertop Ash Decking — Janka hardness: 9.7 kN

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.

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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