DryJoistEZ is a structural deck drainage system; this means that along with being 100% waterproof, it can also span up to six feet between supporting beams, which means it can replace some of the joists you would traditionally use to build your deck. The other popular deck waterproofing systems on the market are membrane systems and “under decking” systems that are installed below your deck joists. Both of these waterproofing methods come with labor-intensive installation processes and are effective only for limited amounts of time. The component materials used in the DryJoistEZ system are extruded from marine-grade aluminum, which makes them strong and extremely durable.  When the DryJoistEZ system is installed, it provides a solid waterproof structure that will never leak. Additionally, DryJoistEZ is mounted on top of your deck frame, which extends the life of framing materials.