Waterproof Deck Systems

Outdoor living spaces are meant to be enjoyed year-round, but exposure to rain and moisture can quickly shorten the lifespan of many traditional deck systems. Water that seeps through the surface can damage structural materials, create leaks in occupied spaces below, and lead to costly repairs down the line. A properly designed Waterproof Deck built with the Outdoor Floor System eliminates those issues by integrating a modular, drainable platform that protects the structure beneath while giving you a clean, durable, and beautiful surface to walk on. Whether you’re designing a rooftop terrace, balcony, or raised patio over living space, this system provides the strength, stability, and long-term moisture protection needed for a truly low-maintenance deck.

What Is a Waterproof Deck?

A waterproof deck is a raised platform that prevents water from penetrating the structure below. In many buildings, particularly those that have occupied rooms or storage spaces underneath, maintaining a watertight barrier is very important. Traditional deck systems typically rely on layers of waterproof membranes, plywood, and fastened decking boards. This is an approach that often traps moisture, causing rot and making maintenance in the future a difficult process. The Outdoor Floor System replaces those complex layers with a structure that is both non-combustible and open-framed, meaning that it sits above the waterproofing membrane rather than being attached to it. Pavers or tiles are installed directly onto the system, which creates a floating surface that allows water to drain freely through the joints while keeping the membrane below fully protected and accessible. The result is a waterproof deck that not only looks good, but also performs consistently and lasts for decades.

How the Outdoor Floor System Protects Against Moisture

The core of the Outdoor Floor System is a combination of interlocking structural panels and adjustable pedestals that form a self-supporting platform. This platform creates a continuous air gap between the deck surface and the substrate, ensuring that any water flows away naturally and does not become trapped beneath materials. Different from regular deck assemblies, no fasteners penetrate the waterproof membrane. This means there are no weak points where leaks can develop over time. The system is fully drainable, fully vented, and fully serviceable, meaning that you can lift a paver at any time to inspect or maintain the surface below without disruption. This system keeps the structure dry and encourages airflow for faster drying after rain. Importantly, it prevents rot and warping, which are commonly associated with conventional decks.

Benefits of a Waterproof Deck Built with the Outdoor Floor System

1. Complete Moisture Protection

Because the deck surface “floats” above the waterproof membrane, there are no penetrations that could cause leaks. The membrane remains intact and accessible for inspection or repair whenever needed.

2. Level and Adjustable

The pedestals can be adjusted to very precise heights, which makes it possible for you to get a level surface regardless of what's underneath.

3. Fully Drainable Design

Our system is designed so that rainwater flows freely through the joints between pavers or tiles and drains away beneath the surface. This prevents standing water from accumulating and protects against mold or mildew.

4. Strong and Lightweight

The composite framing and pedestal system distributes loads evenly across itself. This means that it can support heavy stone or porcelain pavers without adding unnecessary weight to the structure.

5. Low Maintenance

Individual pavers can be lifted for cleaning or access, meaning no more sealed seams, trapped moisture, or difficult repairs.

6. Design Versatility

Compatible with natural stone, porcelain, or structural tile surfaces, the Outdoor Floor System gives you complete freedom to achieve the look and feel you want without sacrificing performance.

Common Applications

Waterproof decks built with the Outdoor Floor System® are ideal for a variety of settings, including: Rooftop decks and terraces Balconies above living spaces Podium levels and courtyards Multi-level apartment balconies Over-garage decks and patios Pool surrounds and spa areas Our system stays waterproof in each of these environments, while also providing you with an easy-to-maintain surface for everyday use.

How Installation Works

Installing a waterproof deck using the Outdoor Floor System is straightforward and clean, as no adhesives or mortar are required. Installation will vary slightly depending on your area, but the general steps are as follows:

1. Prepare the Substrate: Make sure that the waterproof membrane below is clean and intact. It should also be properly sloped for drainage.
2. Position the Pedestals: Lay out the adjustable pedestals according to your paver size and deck layout.
3. Assemble the Frame: To make the frame, simply lock the Outdoor Floor System structural panels or joists into the pedestal tops, creating a level grid.
4. Set the Pavers or Tiles: Place each paver directly onto the grid, checking that you have proper alignment and consistent spacing between them.
5. Finish the Perimeter: Finally, use our recommended containment or trim systems to finish off your deck. These are used to secure the edges of the decking, but they also make your space look much more polished and professional. It's as easy as that. The installation process leaves you with a walkable surface that is instantly ready for use. Best of all, it achieves this without compromising the waterproofing layer beneath.

Why Choose Outdoor Floor System for Waterproof Decks

Traditional waterproof decks often fail where different materials meet. Some examples of this are at the screws and joints. The Outdoor Floor System avoids those weak points entirely by sitting above the waterproofing rather than penetrating it. Each component is designed to perform in exterior environments, with non-combustible materials that resist corrosion and UV exposure over time. This approach protects your investment, meaning that you won't need to replace your decking anytime soon. It also makes long-term maintenance a breeze. If you ever need to service things like your electrics or drainage systems beneath the deck, simply lift a few pavers to access the area without demolition or damage.

Start Building a Better Waterproof Deck

A waterproof deck built with the Outdoor Floor System gives you the freedom to design outdoor spaces that are as durable as they are beautiful. The system combines modern engineering with long-term moisture protection, delivering a structural foundation that’s easy to install, easy to maintain, and ready for any surface finish you choose. If you're planning to build a deck over a living space or on a rooftop terrace, our waterproof systems can help you achieve a professional finish that stays dry and secure for year after year. To learn more about specifications, compatible surfaces, or installation options, contact our Outdoor Floor System team or explore our full range of modular support platforms designed for every type of outdoor environment.