Non-metallic building materials, namely, [ slate, brick, ] cobble stone, stone, aggregate, or cement paving, cladding, edging or coping; fencing materials, namely, [ timber, non-metal wire, plastic, ] stone, cement or aggregate fencing; natural building stone, sand, stone chippings, gravel, aggregates, cast stone; [ non-metallic garden landscaping materials, namely, pre-cast concrete products in the nature of statues, birdbaths, and planters; ] walling and fencing products of stone, [ timber, ] concrete [ and plastic, namely, bricks, posts, balustrading, planks or prefabricated sections; timber products, namely, trellises, arches, pergolas, bird feeding tables; decking, pre-fabricated garden buildings made of wood and other non-metallic materials; pergolas; wooden bird tables and bird feeders, troughs in the nature of concrete bird baths; ] tiles, namely, pavement and paving tiles [; ceramic tiles ]