140x21mm Domed Decking Board, 2 Sided Groove

Our Most Popular Decking Board

The 140x21mm Domed Decking Board with 2-sided groove is our best-selling decking product — and it’s easy to see why. Engineered specifically for the ShadowDeck™ nail-free hidden fastener system, this board combines practical performance with a beautiful natural finish.

The domed profile sheds water efficiently, protecting the timber and extending the life of your deck. The double-sided groove means the ShadowDeck™ fastener clips in from either edge, making installation fast, efficient, and completely nail-free. No exposed fixings. No split boards. Just a clean, seamless deck surface.

Key Features

• 140x21mm profile — the standard width for ShadowDeck™ installations, providing a 3mm gap between boards when fastened
• Domed top surface — sheds water away from the board face, reducing moisture retention and prolonging deck life
• 2-sided groove — grooved on both edges for fast, efficient hidden fixing with ShadowDeck™ fasteners
• Nail-free installation — no screws through the face, no split ends, no unsightly fixings
• Premium Kwila timber — a naturally durable hardwood renowned for its rich colour, density, and resistance to the elements

Compatible With

Designed to work seamlessly with the full ShadowDeck™ fastener range. Refer to our Installation Guide for spacing, joist layout, and fixing instructions.

Sold Per Lineal Metre

Use our online calculator at www.ShadowDeck.co.nz to work out how many lineal metres you need for your project.