Composite decking
Composite decking: wood-plastic composite (WPC) boards used as an alternative to timber for residential decks. Common brands in Australia: Modwood, Trex, Ekodeck.
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Composite decking (also called WPC, wood-plastic composite) is a deck board made from a blend of recycled wood fibre and plastic polymers. It is used as a lower-maintenance alternative to timber decking on residential and commercial outdoor areas.
Common Australian brands include Modwood (Australian-made, recycled pine and plastic), Trex (US origin, recycled wood and polyethylene), and Ekodeck (NCC-compliant per manufacturer specifications). Composite boards do not rot, splinter, or require oiling, but they have specific installation requirements: joist spacing is typically tighter than for timber (often 300 to 400 mm centres), expansion gaps must be maintained at board ends and edges, and hidden clip fixings are standard for most premium profiles.
Supply and install cost is typically $250 to $450/m2 ex-GST (2026), compared to $120 to $250/m2 for merbau or treated pine.
Also known as: WPC decking, wood-plastic composite decking
Category: Decking material
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Last updated: 2026-05-08. Verified: 2026-05-08.