Decking screws for aluminium joists

The SPAX decking screw for aluminium joists allows timber decking boards to be fixed to aluminium bearers.

44mm screw for boards up to 20mm thick.
48mm screw for boards up to 24mm thick.

It is important to use the entire system of products below to avoid any screw failures. Please read the INSTRUCTIONS on how to use this screw system.

How many screws do I need?

Use our Screw Calculator to work out how many & which screws you need.

The aluminium screw MUST be used with the SPAX Air. The screw will not work correctly without it.

The screws are A2 304 grade stainless steel and feature a T-Star Plus drive system. The tip point requires no predrilling of the aluminium and a solid double thread provides excellent grip in the joist.

Combined with the SPAX Air and the SPAX 5.2 drill, this is an entire system for ensuring the best quality and longest-lasting result for your deck.