Non-metallic building materials; worked and semi-worked materials including timber and non-metallic beams, planks, boards, panels, cladding and linings; non-metal wall panelling including internal and external wall panelling; parts of non-metal wall panelling, fittings and accessories for use therewith; tongue and groove wall panels (not of metal); and kits including the foregoing; non-metallic lining boards; non-metallic shiplap boards; strips including decorative strips; all of the foregoing not being made from metal