Sub-category · 3 materials

Decking Materials Melbourne

The full comparison — Merbau, Spotted Gum and composite decking. Cost per square metre, lifespan, hardness, maintenance and sustainability, all in one place. Built by Marc and the Deck It Out crew — Melbourne specialists since 1999.

Melbourne deck built by Deck It Out showing hardwood and composite material options

The three materials

Three deck materials, one builder.

We design, supply and install every option below. Tap any card for the full guide.

Merbau Decking installed in Melbourne by Deckitoutdecks

Material 01

Merbau Decking

South-East Asia (FSC/PEFC certified)

Merbau (Intsia bijuga) is the most installed hardwood deck in Melbourne for good reason: dense, hard, dimensionally stable and delivers a premium look at a moderate price. We source it exclusively from FSC or PEFC certified mills and fix it with stainless or hot-dipped galvanised fasteners over an engineered substructure.

Pros

  • Class 1 above-ground durability
  • Dense, tight grain — splinter-resistant
  • Very dimensionally stable (low cup/twist)
  • Naturally termite resistant
  • Uniform deep red-brown colour

Trade-offs

  • Tannin bleed in first 6–12 months
  • Imported — higher embodied carbon than local timber
  • Needs re-oiling to retain colour
Read full Merbau guide
Spotted Gum Decking installed in Melbourne by Deckitoutdecks

Material 02

Spotted Gum Decking

NSW & QLD east coast (PEFC/AFS certified)

Spotted Gum (Corymbia maculata / citriodora) is the premium Australian-grown choice: harder than Merbau, naturally durable and one of the most beautiful decking timbers in the world. The colour variation from pale honey through deep chocolate inside a single pack is what most homeowners fall in love with at the consult.

Pros

  • Australian-grown — lower transport emissions
  • Class 1 above-ground durability
  • Extremely hard (Janka ~11 kN)
  • Striking honey-to-chocolate grain variation
  • Naturally resistant to Lyctus borer & termites

Trade-offs

  • Harder to machine — higher install cost
  • More colour variation between boards (not for everyone)
  • Needs re-oiling to retain colour
Read full Spotted Gum guide
Composite Decking installed in Melbourne by Deckitoutdecks

Material 03

Composite Decking

USA & Australian-made capped composite

Capped composite has matured into a genuine alternative to hardwood — Trex Transcend, Ekodeck, NewTechWood UltraShield and Modwood all deliver realistic grain, modern colours and a hard polymer cap that protects against fade, mould and stains. Ideal for pool surrounds and busy family decks where weekend maintenance is the last thing you want.

Pros

  • Zero oiling or sanding — wash and go
  • Manufacturer-backed warranty (25–50 yrs)
  • Splinter-free — ideal for kids & bare feet
  • Termite and rot proof
  • Slip-resistant grain — perfect for pools

Trade-offs

  • Higher upfront cost than Merbau
  • Runs warmer than light timber in full sun
  • Looks like timber, but isn't timber
Read full Composite guide

Side-by-side

Merbau vs Spotted Gum vs Composite

FeatureMerbauSpotted GumComposite
OriginSouth-East AsiaAustralia (NSW/QLD)USA & Australia
Class 1 durabilityYesYesn/a (capped polymer)
Janka hardness8.5 kN11 kNn/a
Cost installed (m²)$380–$620$420–$680$450–$750
Lifespan25+ years25+ years25+ years
MaintenanceRe-oil 12–24moRe-oil 12–24moSeasonal wash
Manufacturer warrantyn/a (natural)n/a (natural)25–50 years
Splinter-freeNoNoYes
Pool surround friendlyGoodGoodBest
Australian-grownNoYesPartly
Natural timber lookBestBestGood (improved yearly)

Decision guide

Which decking material should you choose?

There's no single "best" deck — only the right one for your home, your budget and how you'll use the space. Quick guide:

If

You want the best price-to-premium ratio

Pick

Merbau

Dense Class 1 hardwood at the lowest hardwood price-point — Melbourne's most-installed deck for 20+ years.

If

Sustainability and Australian provenance matter

Pick

Spotted Gum

Locally grown PEFC/AFS certified hardwood with the most dramatic grain of any decking timber.

If

You hate maintenance, or it's a pool surround

Pick

Composite

Capped composite from Trex / Ekodeck / NewTechWood / Modwood — wash with soapy water once a season, splinter-free and warranty-backed.

If

Young kids, bare feet, pets and a busy backyard

Pick

Composite

No splinters, no slivers, no hot-day re-oiling. Stays low maintenance for the life of the deck.

If

Period or weatherboard home, classic look

Pick

Merbau or Spotted Gum

Natural timber pairs with traditional architecture in a way composite still can't fully replicate.

Care & maintenance

Looking after your deck — by material.

Hardwood (Merbau & Spotted Gum)

  • Leave new Merbau to weather and rinse tannin bleed before first oil coat (4–8 weeks).
  • Apply penetrating decking oil — Cutek, Intergrain Ultradeck or equivalent — every 12–24 months.
  • Sweep monthly to keep grit out of the grain.
  • Lightly sand and re-oil any high-wear zones every 5–7 years.
  • Re-tighten any loose fixings each year — natural timber moves with seasons.

Composite (Trex, Ekodeck, NewTechWood, Modwood)

  • Sweep loose debris off the surface every week or two.
  • Wash with warm soapy water and a soft brush once per season.
  • Spot-clean stains immediately — capped composite resists, but doesn't ignore.
  • Never pressure-wash above 1500 psi or hold the nozzle under 300mm.
  • No oiling, sanding or sealing — ever.

Sustainability

Sourced responsibly — across every material.

Merbau is supplied exclusively from FSC or PEFC certified mills with chain-of-custody documentation. Spotted Gum comes from PEFC and Australian Forestry Standard (AFS) certified east-coast mills — the lowest-carbon option on the page. Modern composite uses 60–95% recycled timber and HDPE depending on brand, diverting waste from landfill. Whichever material you choose, you're building on the responsible end of the supply chain.

Common questions

Decking materials — answered

Which decking material is best for Melbourne?

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It depends on what you value. For the look and feel of natural timber at the best price, Merbau is Melbourne's most popular hardwood. For sustainable Australian-grown hardwood with dramatic grain, Spotted Gum wins. For zero-maintenance entertaining and pool surrounds, modern capped composite (Trex, Ekodeck, NewTechWood, Modwood) is the best choice. We install all three and recommend the right one at the free on-site consult.

Hardwood vs composite decking — which lasts longer?

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Both can last 25+ years in Melbourne when correctly built. Hardwood (Merbau, Spotted Gum) needs re-oiling every 12–24 months to maintain colour and water resistance. Composite needs only a seasonal wash and carries a manufacturer-backed warranty (commonly 25–50 years). Lifespan is similar — maintenance effort is very different.

How much does decking cost per square metre in Melbourne?

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Supplied and installed in Melbourne: Merbau runs $380–$620/m², Spotted Gum $420–$680/m², and composite $450–$750/m². Final price depends on substructure height, stairs, picture-framing, balustrades and site access. We provide a fixed, itemised quote after a free on-site measure.

Is composite decking really better than timber now?

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Modern fourth-generation capped composite (Trex Transcend, NewTechWood UltraShield, Ekodeck DesignerPlus) is genuinely competitive with timber on look and clearly ahead on maintenance and warranty. It will never feel like real timber underfoot — but for pool surrounds, full-sun decks, and families who want their weekends back, it's now the right call as often as not.

Which composite decking brand do you recommend?

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We install all the major capped composite brands — Trex, Ekodeck, NewTechWood and Modwood — and choose based on your colour preference, deck location, budget and how you'll use the space. Trex Transcend leads on warranty and colour depth; NewTechWood UltraShield is best for full pool encapsulation; Ekodeck and Modwood are strong Australian-made options.

Is Spotted Gum or Merbau more sustainable?

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Spotted Gum, by a clear margin. It's grown in PEFC and AFS certified Australian forests on the NSW and QLD east coast, so transport emissions are a fraction of imported Merbau. We source Merbau only from FSC or PEFC certified mills, but local Spotted Gum is the more sustainable pick if that's your priority.

Do you supply and install all three decking materials?

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Yes. Deck It Out Decks & Pergolas has been building Merbau, Spotted Gum and composite decks across Melbourne since 1999. Marc walks you through the trade-offs at the consult so you choose the right material for your home, budget and how you'll use the deck.

Can you mix materials on one deck?

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Absolutely — and we do this a lot. A common combination is composite boards in the pool zone (zero maintenance, splinter-free) and hardwood on the main entertaining deck for the natural timber look. Picture-framing and inlays let us transition cleanly between materials.

Explore each material

Detailed decking material guides

Each guide covers pricing, installation, maintenance, and real Melbourne project photos. Jump straight to the material you're considering.

Not sure which to choose?

Book a free on-site consult — we'll match the right material to your home.

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