WPC Co-Extrusion Decking 140 x 23 mm (4.12 kg/m) is the heaviest board in our capped range - at 4.12 kg per meter the 140 x 23 section is almost fully filled, giving a volumetric density of 1.28 g/cm3, a notch denser than our standard solid formula. You feel that weight underfoot: a solid, drum-free step, no flex under a crowd, no deformation under sustained load, and far less risk of wind uplift. The dense core also holds fixings firmly, so installation locks in first time. Its weather resistance comes from a polymer shell extruded in step with the core and fused into it - not a laminated film, so there is no layer to peel, blister or lift at the edges. UV exposure won't bleach the colour, rain won't leave it damp or mouldy, and oily or saucy spills wipe straight off the sealed surface - no paint, no wax, ever. With 140 mm width and 23 mm thickness it is the balanced ratio for a wide range of decks: ground-level gardens, terraces, walkways and pool surrounds. Weather resistance with real substance - the heavy-duty answer in our co-extrusion line.