Black Composite Joist

Ensure a strong and long-lasting foundation for your decking with the Black Composite Joist—a high-performance alternative to traditional timber. Made from wood-plastic composite (WPC), these joists offer superior durability, moisture resistance, and structural integrity, making them ideal for supporting composite decking installations. Unlike wood, they won’t rot, warp, or attract insects, ensuring a low-maintenance and reliable substructure for years to come. Available in two sizes—50 x 50 x 2400mm (DECKJOIST-50) and 50 x 100 x 3000mm (DECKJOIST-100)—these joists provide flexibility to suit different project requirements while delivering a sleek, modern black finish.

Technical Specification

• Product Brochure
• Material: Wood-Plastic Composite (WPC)
• Available Sizes:

DECKJOIST-50: 50mm x 50mm x 2400mm

DECKJOIST-100: 50mm x 100mm x 3000mm

• Colour: Black
• Weather Resistant: Yes (UV-stable, moisture-resistant)
• Rot & Insect Resistant: Yes
• Maintenance: Low (No painting or sealing required)
• Applications: Composite decking substructure, patio and terrace support