MARINE GRADE PERFORMANCE
Built to Get Wet. Engineered to Stay That Way.
Marine-grade performance should mean more than a label. Lumberock® decking is made from high-density polyethylene and inorganic mineral fillers, with no wood fiber or organic fillers to absorb moisture.
The result is a waterproof deck board designed for wet, humid, coastal, waterfront, and other high-moisture environments. This performance is not created by a surface coating or temporary treatment—it comes from the composition of the board itself.
That same durable material foundation is built into both the Lumberock Classic and Coastal Collections, providing lasting protection against rot and decay wherever life meets the water.
Some call it synthetic lumber. Lumberock calls it the material standard.
THE PROBLEM
Traditional Decking Wasn’t Made to Stay Wet. Lumberock Was.
Traditional wood decking absorbs moisture, and many composite deck boards still contain wood fiber or organic fillers. In docks, porches, backyards, barns, marinas, and humid climates, repeated exposure to rain, splash, standing water, and changing humidity can contribute to swelling, softening, rot, and premature deterioration.
Lumberock® removes that vulnerability at the material level. Made from high-density polyethylene and inorganic mineral fillers—with no wood fiber or organic fillers—it delivers waterproof composite decking designed for environments where moisture is not occasional. It is part of everyday life.
Not a marketing term. A material standard.
For Lumberock®, marine-grade performance is not a finish, coating, or claim added after the board is made. It begins with the material composition of the board itself.
Every Lumberock board is made from high-density polyethylene and inorganic mineral fillers, with no wood fiber or organic fillers to absorb moisture. The result is waterproof, non-porous decking designed for applications where exposure to water and humidity is constant—not occasional.
- HDPE-based composition: High-density polyethylene gives Lumberock the foundation for long-term moisture resistance and outdoor durability.
- Inorganic mineral fillers: Mineral fillers add strength and stability without introducing wood flour, cellulose, or organic material into the board.
- Zero wood fiber: With no wood fiber inside the board, there is no built-in pathway for water absorption, swelling, or wood-based decay.
- Non-porous surface: Lumberock does not rely on a porous organic core, helping the board resist moisture intrusion and stay easier to clean.
- Wet or dry performance: The material is designed for environments where water is expected, not treated as an occasional accident.
- Collection-wide standard: Marine grade performance is not limited to one specialty product. It is the material foundation behind every Lumberock collection.
Marine grade is built into the board, not applied to the surface.
WHY IT MATTERS
Wet Environments Demand the Right Decking Material
Choosing the wrong decking material for a wet environment can shorten the service life of the entire project. When wood—or composite decking made with wood fiber—is repeatedly exposed to moisture, it can become vulnerable to swelling, softening, rot, decay, and costly repairs.
Lumberock® starts with a different material foundation. Made without wood fiber or organic fillers, it is designed to resist moisture and deliver dependable performance in wet or dry conditions. For homeowners, contractors, and property owners, that means a more durable starting point for docks, decks, porches, marinas, and other moisture-prone spaces.
Wood Absorbs Water. Lumberock Is Built Not To.
Wood may be familiar, but in wet environments it begins with a disadvantage: it absorbs moisture. Over time, repeated exposure to rain, humidity, splash zones, and seasonal weather can contribute to swelling, splitting, soft spots, mildew, rot, and decay.
Lumberock® removes wood from the equation entirely. Made with no wood fiber or organic fillers, the board has no wood-based material inside to absorb moisture the way traditional lumber and many wood-filled composite deck boards can.
The result is marine-grade decking designed for wet, humid, and waterfront environments where moisture is expected—not occasional.
- No wood fiber or organic fillers
- Designed for wet, humid, and waterfront environments
- No wood-based material to absorb moisture
- A durable alternative to traditional and wood-filled decking
With Wood, Rot Is Often a Matter of When
In wet and humid environments, traditional wood decking can become vulnerable to rot as moisture repeatedly enters the material. Many composite deck boards also contain wood fiber or organic fillers, which can introduce some of the same moisture-related concerns over time.
Lumberock® marine-grade lumber is built differently. With no wood fiber or organic fillers, it removes the wood-based material that rot and decay depend on. That makes Lumberock a dependable choice for homeowners, contractors, and property owners who want to avoid the recurring repairs that can begin when moisture gets inside traditional decking.
- No wood fiber or organic fillers
- Will not rot or decay
- Helps avoid soft spots caused by wood deterioration
- Built for docks, porches, backyards, barns, and marina environments
A Cleaner Surface Starts with a Non-Porous Board
In high-moisture environments, cleanability matters. Porch boards collect pollen, dirt, and rain. Dock decking is exposed to lake water, saltwater, wet foot traffic, and everyday spills. Barn and stable applications may require frequent washdowns and routine cleanup.
Porous wood and wood-based materials can absorb moisture, odors, and organic residue, making them more difficult to maintain over time. Lumberock® is made without wood fiber or organic fillers and does not rely on a moisture-sensitive organic core. Its non-porous material composition supports easier routine cleaning in waterfront, residential, agricultural, and other high-moisture applications.
- Non-porous composition supports easier routine cleaning
- No wood fiber or organic fillers to absorb moisture
- Well suited for docks, porches, barns, stables, and waterfront spaces
- Designed for repeated wetting and washdown without wood-based deterioration
MARINE GRADE BY THE NUMBERS
The numbers that matter
20+
Years of Lumberock performance
Nationwide
Ships across the United States
Lifetime
Lifetime Warranty for the original consumer purchaser
HEAR IT FROM THE PROS
Why contractors choose Lumberock when moisture performance matters
Use this section for a contractor or customer who chose Lumberock for a wet, waterfront, porch, marina, agricultural, or high-moisture environment. The strongest proof will come from someone who has replaced wood or ordinary composite material and can speak to the difference in maintenance, longevity, and confidence.
Real projects. Real conditions. Real results.
ALL MARINE GRADE. EVERY COLLECTION.
Every Lumberock collection carries the same marine grade standard.
SHOP BY PERFORMANCE
24″ On-Center Span
Every Lumberock property comes out of the same wood-free, mineral-filled formula. Here is the rest of what that buys you.
No Rot / No Wood Fiber
No organic filler means nothing for rot, mold, or insects to feed on.
Low-Maintenance Decking
No sanding, no staining, no sealing. Soap and water is the whole routine.
Heavy-Duty Plastic Lumber
For the loads and traffic that chew through conventional decking.
Profile & Size Flexibility
A full range of profiles and lengths — a material system, not a single board.
24″ On-Center Span
A structural advantage that can simplify framing when the application supports it.
READY TO BUILD SOMETHING THAT LASTS?
Start with a material built for water.
Whether you are building a dock, porch, backyard deck, barn floor, marina walkway, or custom outdoor project, Lumberock gives you a marine grade material standard you can build around. Request free samples and see what waterproof deck boards with zero wood fiber feel like in your hand. A single composite deck board with wood fiber inside can compromise the whole installation. Choose the material standard instead.