Our aluminium decking joists (3.6m) are designed for superior strength and long-lasting performance, making them the ideal solution for your raised composite decking project. Made from high-quality T6 aluminium, these aluminium joists offer exceptional corrosion resistance while remaining lightweight for easy handling and installation. The black powder-coated finish provides extra protection and ensures a discreet appearance beneath your deck.
Before installation, ensure you lay a weed membrane over any soil, grass, or previous vegetation areas to prevent unwanted growth beneath your deck.
Measuring 75mm (H) x 40mm (W) x 3600mm (L), these aluminium joists require adjustable pedestal supports every 1.2 metres, reducing the number of supports needed, which saves both time and money. This efficient design makes our aluminium decking frame perfect for creating a stable and durable foundation for your decking boards, whether you’re a professional contractor or a DIY enthusiast.
Securing the aluminium joists into position is straightforward with our aluminium joist hangers and flat joining plates, especially when using our decking clips supplied with self-drilling screws, ensuring a secure and stable decking structure. Perfect for creating raised deck areas, our aluminium joists offer the strength and durability you need for a deck that’s built to last.

















Very lightweight but strong, which is exactly what is needed. Easy to cut to size, I used both a handsaw and a chop saw, and I used a drill and pop rivet to join joists lengthwise as well as screwing decking board clips directly into joists.
Product that I just need to do my composite decking, easy to cut to size hangs on aluminium hangers great for any external subframes. Highly recommend to any one that are thinking of having a decking
I’m very happy with the quality of this product. For the price it’s the best anyone can get. I used plastic pedestals with this alu joist to make a solid frame for composite decking.
Great product and great finish
Made building the deck very easy