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Waterproof Deck System – DryJoist

Waterproof Deck System – DryJoist

Structural Deck Drainage System

NexGEN DryJoist is a structural deck drainage system that provides the structure of the deck, a waterproof solution and a finished ceiling with a traditional bead board appearance, all in one step! DryJoist is easy to handle and cut and can be installed in any weather conditions, wet or dry. It is perfect for balconies and decks for both residential and commercial applications.

Built-in Waterproof Solution

Replacing traditional wooden joists while creating a 100% dry space in the area below. It’s a single system, integrative design that eliminates add-on gutter systems, waterproofing membranes or drainage substructures.

Three products in One!

Waterproof Deck System – DryJoist

Waterproof Substructure – Deck drain allows for 100% waterproof area underneath

Waterproof Deck System – DryJoist

Joist System for Decking – Low profile structural system will span up to 1.8metres long

Waterproof Deck System – DryJoist

Finished Ceiling Underneath – Powdercoated beadboard finished soffit ceiling


With only two components, NexGEN DryJoist is perfect for new construction or remodelling existing structures and provides a lifetime of strength and durability. DryJoist is capable of spanning 1800mm without the need of support beams and provides structural support for deck boards every 150mm on centre. Installation requires standard deck tools and the lightweight aluminium boards are much easier to handle than traditional materials such as pressure treated timber.


Made of marine-grade, precision-extruded aluminium, the system is strong enough to replace the need for conventional wood joists and is impervious to rot, insects, mildew, and fire.

NexGEN Decking


Can’t decide on a colour? Single sided or reversible board? Do you want to test the stain and fade resistance? Fill out the form and we’ll express post your free samples box out to you ASAP!

Get Yours Here


Contact us to kick things off. This will be more fun than you think!