Trex Golden Hour Composite Decking 20ft Grooved

When designing a large-scale outdoor living space, visual continuity is everything. At National Decking, we supply the Trex Golden Hour Composite Decking 20ft Grooved to professionals and homeowners aiming for a flawless, high-end result.

Every joint and screw on a deck surface breaks the visual flow. By utilizing a 20-foot board, you can span entire sections of your backyard without a single splice. Furthermore, the precision-machined grooves on the sides of these boards are designed exclusively for hidden fastener systems (like Trex Hideaway® clips). The clips secure the decking directly to the joists invisibly, resulting in a perfectly smooth surface that mirrors the elegance of interior hardwood flooring.

Premium Performance Built for the Elements 

National Decking knows that the structural integrity of your materials is what guarantees long-term satisfaction.

• SunComfortable™ Heat-Mitigation: The Trex Golden Hour Composite Decking 20ft Grooved colorway utilizes advanced solar-reflective engineering. It absorbs significantly less heat than traditional dark composites, keeping your expansive deck cooler to the touch during the peak of summer.
• Lightweight Scalloped Profile: Maneuvering a 20-foot board can be a challenge. Trex utilizes an intelligent scalloped (ridged) bottom profile that removes unnecessary bulk, making these long boards significantly lighter and easier to handle on the job site without sacrificing span strength.
• Eco-Friendly Engineering: Proudly manufactured in the USA, Trex composite boards are engineered using 95% reclaimed sawdust and recycled plastic film, ensuring your beautiful deck is also an environmentally responsible choice.

National Decking Pro-Tip: Thermal expansion is the most critical factor when working with 20-foot composite boards. Because they are longer, they will expand and contract more than 12ft or 16ft boards. Always install these boards during the cooler parts of the day and strictly adhere to Trex’s temperature-specific gapping guidelines at the ends of the boards. We recommend using the Trex Hideaway® Universal Hidden Fasteners, as they automatically set the perfect 1/4-inch side-to-side gap while securing the board.

Technical Specifications

Frequently Asked Questions

Are Trex Golden Hour Composite Decking 20ft Grooved harder to install?

The fastening process is actually faster with grooved boards once you get the rhythm down, as hidden clips easily slide into place. However, 20-foot lengths require at least two people to safely carry and position them without damaging the boards or stressing the material.

Can I use solid (square-edge) boards with these Trex Golden Hour Composite Decking 20ft Grooved boards?

Yes, and you absolutely should! Grooved boards are used for the main body of the deck, but you should frame the outer perimeter (the “picture frame”) using Trex Golden Hour Solid boards. This hides the exposed side-grooves from being seen from the yard, locking in that clean, modern aesthetic.

Will a 20-foot scalloped board sag between joists?

No. The scalloped profile is fully engineered and tested to maintain standard span ratings. As long as your deck substructure is built with joists spaced no more than 16 inches on center (for perpendicular installation), the boards will remain perfectly rigid and secure.