Waterproof Composite Board for Long-Lasting Outdoor Projects

composite board

When it comes to outdoor projects, selecting the right materials is crucial. Whether you’re constructing a deck, dock, or marine structure, you need materials that can withstand the elements. At Coosa Composites, we understand these challenges and offer top-of-the-line waterproof composite boards designed to meet the demands of harsh environments.

What is a Waterproof Composite Board?

A waterproof composite board from Coosa Composites is crafted from a blend of fiberglass and high-density polyurethane foam. This combination creates a lightweight yet incredibly strong material that outperforms traditional wood and plywood. Our composite marine boards are engineered to resist water, making them an excellent choice for projects exposed to moisture and marine environments​. 

The Advantages of Waterproof Composite Boards

1. Superior Water Resistance

Water resistance is the hallmark of our composite boards. Unlike wood, which absorbs water and can rot, our boards are impervious to moisture. This makes them ideal for applications like decks and docks, where exposure to water is constant. With Coosa’s waterproof composite boards, you can be confident that your structures will remain robust and intact over time​.

2. Unmatched Durability

waterproof composite board

Coosa’s waterproof composite boards offer unparalleled durability. The integration of fiberglass ensures that these boards can endure significant wear and tear without compromising their structural integrity. This durability is crucial for marine environments, where materials must withstand constant exposure to water, salt, and fluctuating temperatures. Our composite marine boards are built to endure these harsh conditions, ensuring long-lasting performance.

3. Minimal Maintenance

One of the standout features of Coosa’s waterproof composite boards is their low maintenance requirements. Traditional wood structures demand regular treatment, sealing, and occasional replacement of damaged sections. In contrast, our composite boards require minimal upkeep. 

Ideal Applications for Waterproof Composite Boards


Building a deck with Coosa’s waterproof composite boards ensures that your outdoor space remains beautiful and functional regardless of the weather. Our boards resist the warping and splintering common with wooden decks, providing a smooth, safe surface for all your outdoor activities. A Coosa subfloor allows you to choose the perfect finished floor option for your needs whether that’s luxury tile, vinyl, or a non-slip foam flooring.


Docks are constantly exposed to water and environmental stress. Coosa’s composite marine boards are specifically designed to handle these challenges. Using our waterproof composite boards for dock construction guarantees durability and safety, ensuring your dock remains in excellent condition for years to come​. 

Marine Structures

For larger marine structures such as piers, boardwalks, and seawalls, the strength and durability of Coosa’s waterproof composite boards are invaluable. These structures require materials that can withstand the continuous impact of waves, saltwater, and marine life. Our composite marine boards provide the necessary resilience, ensuring these structures remain secure and functional over the long term.

Why Choose Coosa Composites?

Coosa Composites has built a reputation for producing high-quality, reliable composite materials. Our commitment to innovation and excellence means you get products that are not only functional but also long-lasting. Our waterproof composite boards are tested rigorously to ensure they meet the highest standards of performance and durability.

Invest in a Waterproof Composite Board for Long-Term Success

Coosa’s waterproof composite boards are the ultimate solution for outdoor construction projects. Their superior water resistance, unmatched durability, and minimal maintenance requirements make them the perfect choice for decks, docks, and marine structures. By opting for Coosa’s composite marine boards, you’re investing in a long-lasting solution that will stand the test of time.

Ready to transform your outdoor space? Explore our range of high-quality waterproof composite boards and see how Coosa Composites can elevate your next project. Contact us today!