Building materials, not of metal, namely, membranes for roofs, window shutters; Geotextiles, namely, fabric and sheeting for construction of nurseries, greenhouses, water ponds and drainage systems for landfills, and for use in landscaping and landscape gardening; non-metal grilles for marking out construction sites and building zones, as barriers to control pedestrian traffic, and to mark the presence of pipes, pipelines or cables buried underground; railings not of metal for fence, bridge, ...