WPC Co-Extrusion Decking 140 x 20 mm (3.576 kg/m) is the slim board in our dense co-extrusion range. It comes off the same core recipe as the 140 x 23 mm - a volumetric density of 1.277 g/cm3 against 1.280 - so the density is identical and only the height drops by 3 mm. Those 3 mm buy you three things: lower total weight per square metre (0.54 kg less per meter), which matters on rooftops, balconies and mezzanines with load limits; a deck that sits lower, so steps, edge trims and transitions to doors or interior floors are far easier to detail; and less material per square metre, for a friendlier purchase cost. The weather resistance comes from a shell that is grown onto the core during extrusion - one composite body with no interface to peel - so it will not delaminate or lift. No paint, no wax. The density of a solid co-extrusion board, with less height, less weight and less cost - that is the 140 x 20 mm.

WPC Co-Extrusion Decking 148 × 22.5 mm (2.75 kg/m) — the wide-board option in our capped composite line. A polymer shell is co-extruded around the core in a single pass and fully bonded 360°, so it will not peel, delaminate or lift at the edges. The result is built-in weather resistance: UV-stable and fade-free, holding its factory colour after years in the sun; a dense, non-porous surface that repels coffee, sauce and oil stains — wipe once and it's clean, no staining, no mould; waterproof, scratch- and wear-resistant, with no painting, oiling or waxing ever needed. The 22.5 mm profile weighs just 2.75 kg per meter — solid underfoot yet light to handle, transport and install, ideal for rooftop terraces, balconies and poolside areas where weight and labour matter. And at 148 mm it is wider than standard 140 mm boards, so you need fewer boards and fewer joints for a more continuous, seamless-looking deck.