WPC Solid Straight-Grain Thin Decking 140 x 10 mm (1.86 kg/m) is the deck board that puts down the burden of thickness. A conventional WPC deck board is 22-25 mm thick because it has to carry the span between joists on its own section; on this board the span is handed to the substrate - it goes down on a concrete roof slab or an old balcony's tiled surface, bases that are already hard, or on joists tightened to 25-30 cm centres, and 10 mm of solid section is then all it needs. For a timber-deck finish on a roof, a balcony or any hard base where you cannot add load and cannot raise the level, this 140 x 10 solid straight-grain thin board is the one built for that place. 140 x 10 mm solid straight-grain thin WPC decking, 1.86 kg/m - just 13.3 kg of board per square metre, the lightest deck board in the range; a 10 mm finished face that clears the doors, laid on hard bases or on close-centred joists.