Discover our premium Timber & MDF Window Boards, designed to give your windows a clean, professional finish. A window board (often called a window sill or cill) covers the internal base of a window, protecting the wall below from condensation, everyday wear, and minor knocks, while also providing a decorative ledge that completes the look of a room.

Our MDF window boards feature a moisture-resistant core and are factory-primed for easy painting. They are smooth, knot-free, and dimensionally stable—perfect for modern homes where consistency and a flawless finish are important. Timber options provide a natural, durable alternative where a traditional look is preferred.

Installation is straightforward: simply measure and cut the board to size, ensuring a snug fit within the window recess. Apply a suitable adhesive or mechanical fixings to secure the board in place, then seal edges with caulk or silicone for a neat finish. Once fitted, boards can be sanded lightly and painted to match your interior décor.

At TimberOnline (Nottage Timber Merchants), we stock high-quality window boards ready for quick delivery. With decades of experience, we help customers achieve a professional finish that’s built to last.

Tip: Always ensure edges are sealed properly to prevent moisture ingress and maintain a long-lasting finish.