Trex Millstone Composite Decking 12ft Grooved

Trex Millstone Composite Decking 12ft Grooved Board delivers a clean, neutral aesthetic combined with the enhanced durability and long-term performance of the Trex Select collection. Designed with a grooved-edge profile, this board is installed using hidden fasteners, creating a smooth, screw-free deck surface that enhances both comfort and visual appeal.

Trex Select decking is engineered to offer improved colour consistency, realistic wood-grain embossing, and extended warranty coverage compared to entry-level composite lines. Millstone is built to resist fading, staining, moisture absorption, warping, and splintering—making it a dependable choice for Canadian climates exposed to sun, rain, snow, and freeze–thaw cycles.

Color & Appearance

Millstone features a soft, balanced grey tone with subtle taupe undertones and refined wood-grain embossing, inspired by natural stone and lightly weathered hardwood. The colour is modern yet timeless, making it easy to pair with black, white, bronze, or stainless-steel railings, as well as stone, brick, and contemporary exterior finishes.

Key Features & Benefits

• Grooved profile for hidden fasteners
  Enables clip-style installation for a clean, fastener-free deck surface.
• Enhanced Trex Select durability
  Built with a thicker protective shell for improved fade resistance and long-term colour stability.
• Authentic wood-grain texture
  Delivers the look of real wood without sanding, staining, or sealing.
• Fade & stain resistant surface
  Designed to withstand UV exposure, food spills, and everyday outdoor wear.
• Low-maintenance performance
  Requires only occasional cleaning—no painting or refinishing needed.
• Moisture-resistant and splinter-free
  Will not rot, crack, or warp, even in damp or high-humidity environments.
• System compatibility
  Coordinates seamlessly with Millstone solid boards, fascia, and risers.

Care & Maintenance

Trex Millstone Composite Decking 12ft Grooved requires minimal upkeep. Routine cleaning with mild soap and water is enough to maintain its appearance. The composite material does not absorb moisture, ensuring dimensional stability and consistent colour over time without refinishing.

Recommended Applications

• Residential deck surfaces using hidden fasteners
• Modern, transitional, and minimalist outdoor designs
• High-traffic decks and entertaining areas
• Poolside and moisture-prone environments
• Renovation projects replacing traditional wood decking
• Deck systems combining grooved boards with solid-edge borders

Question & Answers

How does Trex Select compare to Trex Enhance?
Trex Select features a thicker protective shell, more defined wood-grain embossing, improved colour consistency, and a longer 35-year residential warranty, making it a more durable, long-term solution.

Can the grooved board be used for stair treads?
No. For stair treads, borders, and picture framing, Trex recommends using Millstone solid-edge boards, which allow proper face fastening.

Will Millstone fade over time?
Trex Select decking is engineered to resist UV fading and is backed by a 35-Year Residential Fade & Stain Warranty, ensuring long-term colour protection.

Where to Buy Trex Millstone Composite Decking 12ft Grooved

Give your deck a refined, finished look with Trex Millstone Composite Decking 12ft Grooved, available at National Decking, a trusted composite decking supplier in Canada.