A 140 × 23 mm co-extrusion WPC decking board — the first co-extruded (capped) product in the range, built on a different technical road from all the uncapped boards before it. A conventional WPC board extrudes one material through and through; this board extrudes a dense engineering-polymer cap layer onto the core simultaneously, in-line, fusing core and shell into one piece on the same production line — it cannot delaminate or peel.The 140 × 23 co-extrusion board is for the briefs that ask for colour that lasts, stains that don't stick and handling that stays light: premium residential gardens, terraces, balconies and guesthouses — the customers who pay for how it looks in year five.