It's not just that
Designboard decking is great for modern design, it is an ideal material for accessible gardens because its smooth, consistent surface makes manoeuvring wheelchairs and walking aids easy. Kate used it on the upper level, where a vantage point overlooked the curved path and play area below.
DesignBoard composite decking is made up of 50% rice husks, which gives it a natural appearance as well as making it extremely hard-wearing: exactly what’s needed where heavy equipment might be bumped against it. Composite decking is also lighter than stone or porcelain paving, and therefore was a practical selection for the floor of an upper storey.
Kate's thoughtful orientation of the boards enhanced the sense of space by drawing your eye across the balcony. The small and consistent gaps (too small to hamper wheels) between the boards also gave a much airier feel than solid paving would have done.