DryJoist is a structural deck drainage system, meaning the deck’s surface is supported by the same system that creates a dry space in the area below. Traditionally, joists are repeated structural members used to build a supporting frame, ultimately determining the design, strength, and material selection for the deck’s surface. DryJoist has the necessary utility of traditional deck joists yet provides the freedom to build a truly custom deck surface that is both waterproof and unmatched in structural strength.

DryJoist is the first to provide structural supports for the deck’s surface boards while creating a 100% dry outdoor living space in a single deck system.

1. Unlike other waterproofing solutions, DryJoist mounts on top of beams and posts. Nothing penetrates the water channels.

2. Provides support for deck boards on 4" centers. Elaborate patterns can be easily created with your deck board of choice.

3. Provides a finished ceiling for your outdoor living area.

4. Surface mount railing clips allow railing to be installed without penetrating the waterproof surface.

5. Can span 8' between beams and replaces traditional joists in new construction.

6. Compatible with hidden fastener systems.

7. Lights and ceiling fans can be mounted directly to the DryJoist with all wiring hidden in the screw channel.