100% Submersible Marine Composite Decking for Docks 

Water has met its match.

Water has always wreaked havoc on outdoor building materials — splintering docks, warping marinas, and turning boardwalks into a patchwork of rot and decay. Now, Trex offers a way to fight back against this destruction with our 100% submersible, saltwater-safe, built-to-last product.

With Trex composite decking, not only can you rest assured that your dock is durable and will hold up for years to come, but it's also good for the planet. Made with 95% recycled and reclaimed materials, it’s a sustainable choice you can feel good about.

Low-Maintenance Dock, High Visual Appeal

As you build your dock, the last thing you want to think about is the years of constant maintenance ahead. Trex decking is built for relentless performance — so you can spend more time on the water and less time on your dock's upkeep.

Trex decking offers elegant woodgrain textures and on-trend color options that transform your dock from a practical space to an eye-catching focal point of your outdoor design.

Worried about replacing boards that fade and stain from long days of fun in the sun? Trex has you covered with fade- and stain-resistant decking* designed to endure season after season as you get the most use out of your dock.

Another appealing thing about Trex is just how many on-trend color options we offer. Get inspired by images of gorgeous docks and marinas featuring durable Trex decking.


*For details, please see the Care & Cleaning Guide available at trex.com/care

What makes Trex marine-ready?

Every Trex board features a durable capped surface and an uncapped underside engineered for airflow and drainage to help maintain long‑term structural integrity, so moisture, rot, and decay are no match.

Engineered for Performance

Trex's capped composite deck boards are engineered to withstand the rigors of harsh waterfront conditions. Through full submersion, salt exposure, and constant moisture, your dock will continue to perform as well in 10 years as it does on day one.

Outlasts Wood

No sanding, no sealing, and no rotting. Trex decking outlasts traditional wood docks. But what about when it's time to clean up? With Trex, soap and water are all you need.* Plus, you have the added benefit of knowing you're making a more sustainable purchase, as Trex composite decking is made with 95% recycled and reclaimed materials.

See How Trex Beats Wood

Smart in the Sun

From backyard decks to dockside spaces, splinter-free Trex decking is designed for durability and everyday enjoyment. With SunComfortable™ Technology* available in select products, Trex decking is engineered to reduce heat absorption and stay cooler than our original boards—so you can enjoy more time outside, even on bright, sunny days.

Explore SunComfortable™ Decking

Long-Term Reliability

Sun, salt, storms, and rising tides — Trex marine decking has the reliability to handle it all and is backed by limited residential warranties** and Trex's trusted brand name.


*Trex SunComfortable™ decking stays cooler than our original boards, but like all decking, it will get hot in direct sun, especially darker colors. Care should be taken to avoid extended contact between exposed skin and the deck surface, especially with young children and those with special needs.

**For details, please see the Warranty information available at trex.com/warranty.

From Mid-Atlantic Storm Surges To The Hot Florida Sun, Seeing Is Believing.

How Trex Marine Decking Stands Up to Real-World Conditions

Not sure if Trex marine decking is tough enough for your home? Our real-world results speak for themselves. Our decking is trusted by builders, homeowners, and large-scale projects around the world, including:
 

  • More than 2 million square feet of Trex decking installations for waterfront projects since 2010
  • An 8.5-mile-long boardwalk in Dubai in the UAE — our largest project to date, which is even visible from space
  • A one-mile-long boardwalk in Everglades National Park, which receives up to 65 inches of rainfall per year
  • 80% of New Jersey’s rebuilt boardwalks, done with Trex after Hurricane Sandy

Our marine decking was selected for these projects to deliver on the promise of Trex's industry-leading quality.

After over 10 years, I can say the boardwalk decking has not only exceeded our expectations, but it actually looks like it was just recently installed!

- Paul Calabrese, PE, Watermen LLC - Engineer for the Belmar boardwalk design and construction

Extending the Lifespan of Your Dock

If you ask the Mondavi family, they’ll tell you their South Carolina composite dock decking looks as good today as it did on the day it was installed. Built a decade ago, they have survived hurricanes, salt spray, high tides, gale-force winds, and more than a few spilled sodas and Chardonnays.

A Deck That Gets Better With Age?

Of course not. 

But if you ask the Mondavi family, they’ll tell you their South Carolina deck and dock look as good as the day they were installed. Built a decade ago, they have survived hurricanes, salt spray, high tides, gale-force winds, and more than a few spilled sodas and chardonnays.

Trex isn’t just for coastal homes, though. From docks to marinas to your own backyard, Trex holds its ground, even in the toughest conditions.

Water has met its match. Trex.

A Deck That Gets Better With Age?

Of course not. 

But if you ask the Mondavi family they’ll tell you their South Carolina deck looks as good as the day it was installed. Built a decade ago, it has survived hurricanes, salt spray, high tides, gale-force winds, and more than a few spilled sodas and chardonnays.

Trex isn’t just for coastal homes, though. From docks to marinas to your own backyard, Trex holds its ground, even in the toughest conditions.

Water has met its match. Us.

See the Trex Difference: 10 Years Later

 

See how Trex has stood the test of time and water with for the Mondavi Family.

Don't Sweat the Splashes. 

Trex doesn’t just resist water—it rebels against it. And it does more than just look good doing so. Whether it’s a sudden downpour or a busy family gathering, Trex stands strong. So, go ahead and enjoy your deck. No need to worry about water damage or the occasional fumbled dinner plate.

Trex takes it all in stride as should you.

Now you’ll have more time to focus on what really matters — like family and meeting your teenage daughter’s boyfriend for the first time.

That’s life. 

Go Ahead, Dip Your Toes In.

Whet your appetite for our submersible composite Trex boards made with up to 95% recycled and reclaimed materials.

 
Dive In Order a Sample

Beautifully Repelling Water In All Forms.

Whether kissed by ocean spray, immersed in a quiet lake, or weathering an endless barrage of cannonballing kids, every single Trex board is built to handle whatever nature — or human nature — throws its way.

And with seven of our Trex decking colors featuring our SunComfortable heat-mitigating technology, your deck will stay cooler*, even where the highest-rated SPFs are slathered on shoulders and noses.

But perhaps the most appealing thing about Trex is just how many elegant, on-trend color options we offer. 

Versatile. Submersible. Gorgeous. We’re running out of superlatives. That’s Trex for you.

Beautifully Repelling Water In All Forms.

Whether kissed by ocean spray, immersed in a quiet lake, or weathering an endless barrage of cannonballing kids, every single Trex board is built to handle whatever nature — or human nature — throws its way.

And with nine of our Trex decking colors featuring our SunComfortable™ heat-mitigating technology, your deck will stay cooler*, even where the highest-rated SPFs are slathered on shoulders and noses.

But perhaps the most appealing thing about Trex is just how many elegant, on-trend color options we offer. 

Versatile. Submersible. Gorgeous. We’re running out of superlatives. That’s Trex for you.

*Our SunComfortable™ products with heat-mitigating technology are designed to be cooler than most other composite decking products of a similar color. Although engineered to be more comfortable, they can still get hot to the touch when direct sunlight and high temperatures converge for extended periods of time. On such days, care should be taken.

Beautifully Repelling Water In All Forms.

Whether kissed by ocean spray, immersed in a quiet lake, or weathering an endless barrage of cannonballing kids, every single Trex board is built to handle whatever nature — or human nature — throws its way.

And with seven of our Trex decking colors featuring our SunComfortable heat-mitigating technology, your deck will stay cooler*, even where the highest-rated SPFs are slathered on shoulders and noses.

But perhaps the most appealing thing about Trex is just how many elegant, on-trend color options we offer. 

Versatile. Submersible. Gorgeous. We’re running out of superlatives. That’s Trex for you.

Frequently Asked Questions

Have more questions about Trex?

View All FAQs
01
Is Trex fully submersible?

Yes, Trex is designed to hold up beautifully in situations that might find it fully submersed in water. 

02
Is it true that Trex can remain submerged in water for extended periods of time?

Yes. Trex has been used on docks and in marinas for ladders that are submersed multiple times a day as the tide rolls in.

03
Do I need to apply a waterproof sealant to my decking?

No. Trex decking comes ready for whatever your life has in store for it.

04
Will the surface get hot to the touch?

On a hot day in direct sunlight, Trex will get hot. Otherwise, Trex decking will remain comfortable in most situations.

05
Is Trex decking environmentally friendly?

Yes. Trex composite decking is sustainably made in the USA from up to 95% recycled plastic film and reclaimed wood.

View All FAQs

Discover Inspiration For Your Next Waterfront Deck Project.

  • 1. An aerial shot of a boat docked at a dock made with Trex decking.
  • 2. A dog sitting at the end of a dock with a sunset in the background.
  • 3. Two chairs on a Trex boardwalk facing the beach with the beginnings of sunset in the distance.
  • 4. Beautiful dock on the water made of Trex decking in the color Whidbey at sunset.
  • 5. Two chairs sitting on a dock made of Trex decking with a gorgeous sunset illuminating the water.
  • 6. A boardwalk in a nature preserve made with Trex decking, made so people can walk through and over wetlands and water features.
  • 7. Dock at night made with Trex Transcend with Trex outdoor lighting lighting the night beautifully.
  • 8. A closeup view of a dock made with Trex decking with the water glimmering in the background and a chair and plant decorating the edge of the dock.
  • 9. An aerial view of a Trex deck in the color Biscayne with some nice deck furniture featured on the deck.
  • 10. A dock made with Trex decking with a beautiful boat docking at it.
  • 11. A dock on the water made with Trex Signature decking with Trex Signature railing accenting the deck, while the sunsets over the greenery in the background.
  • 12. A dock made of Trex decking with it cut to allow a boat to dock under a covering. A staircase connects to the dock and leads to a higher level deck made of Trex decking in the color Whidbey.
  • 13. Woman sitting on a dock made of Trex decking, with the water behind her.
  • 14. A person walking down a dock made of Trex decking as it leads to the shore.
  • 15. A sunhat and blanket laying on a dock made with Trex decking in the color Whidbey.

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This content was partially or fully generated by AI and has been reviewed by our team to ensure accuracy and relevance.

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