Material Comparison · Decking & Materials

Merbau vs Spotted Gum Decking: Coastal Durability & Cost

Which hardwood timber wins for Sunshine Coast decks? Merbau vs Australian Spotted Gum comparison.

Spotted Gum (Native AU)

Advantages

Very high density (Janka 11kN)
Minimal tannin bleed onto pavers
Stunning wavy grain variation
BAL-29 bushfire rated

Considerations

Slightly higher cost than Merbau
Harder to screw without pre-drilling

Merbau (Imported)

Advantages

More uniform reddish-brown color
Economical hardwood option
High oil content resists decay

Considerations

Heavy tannin bleeding when wet
Slightly lower Janka hardness than Spotted Gum
Imported supply chain variations

The Builder's Verdict

Spotted Gum is the clear winner near light-colored outdoor paving or pool surrounds where Merbau tannin bleed could stain stone. Merbau remains an economical, durable hardwood choice when installed over garden beds.

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