Geotextiles; Building materials, namely, manufactured cement, marble and stone veneer for use on floors, walls and exterior surfaces; Ceilings, not of metal; Crash barriers of concrete, wood and plastic for roads; Drain pipes, not of metal; Ducts, not of metal, for ventilating and air-conditioning installations; Fences, not of metal; Gates, not of metal; Gutters, not of metal; Manhole covers, not of metal; Modular plastic decking to serve as a ground cover; Non-metal guard rails; Non-metal slabs of cement, concrete, clay and slate; Paving blocks, not of metal; Plastic conduit for drainage and irrigation; Plastic oil and debris trap for storm drainage; Plastic water conduits for roofs and balconies; Roofing tiles, not of metal; Sewer pipes, not of metal; Transportable buildings, not of metal