Treated Timber Decking Boards 26x145mm 3.6M & 4.8M Long FINISHED Premium Grade

These premium grade softwood decking boards provide a durable and versatile solution for outdoor flooring projects. Each board is pre-treated with Tanalith E Extra, which includes a built-in water repellent to help protect the timber against the damp British climate. The reversible design features a smooth finish on one side and a grooved surface on the other. This makes them suitable for homeowners or contractors looking for a reliable, high-standard timber finish that balances aesthetics with long-term structural integrity.

This timber is ideal for creating raised garden platforms, patio extensions, or formal walkways around residential properties. Because the boards are reversible, you can choose the smooth face for a sleek dining area or the grooved side for increased slip resistance on garden paths and ramps. In a commercial setting, they work well for low-traffic pedestrian areas or poolside surrounds where moisture management is vital. Whether you are upgrading a small courtyard in a London townhouse or building a large deck in a rural garden, these boards handle varied outdoor environments effectively.

Proper installation requires a sturdy subframe, typically constructed from treated timber joists spaced at regular intervals. You will need a drill, a saw for precise cutting, and stainless steel or coated decking screws to prevent rust staining. Before you begin, ensure the ground is level and the subframe is well-ventilated to prevent moisture buildup underneath. Laying the boards with consistent gaps allows for natural expansion and contraction during seasonal temperature shifts. Always check your measurements before fixing the timber to the frame.

These boards are available in two primary lengths to suit different project scales. You can select the 26mm x 145mm x 3.6m option or the larger 145mm x 4.8m length. For those managing larger builds, we offer convenient packs of 10 or 20 boards to reduce individual handling. Every board is finished in a natural tone, allowing you to apply a bespoke stain or oil later if you wish to change the colour.