Sand, gravel, crushed stone, asphalt, bitumen, cement, gypsum, plaster, concrete, and marble blocks, all for use as building materials; building materials, namely, boards and tiles made of concrete, gypsum, clay, potters' clay, stone, marble, wood, and plastic; synthetic materials for building, construction, road construction purposes, namely, plastic pipe supports; nonmetallic transportable buildings; non-metallic building materials, namely, soffits; poles not of metal for power lines; portable, free-standing barriers not of metal; panels and sheets, being building materials, namely, non-metal floor panels, facing sheets of plywood; bitumen paper for building roofs; bitumen sealants for roofs; doors and windows of wood and synthetic materials; traffic signs not of metal, non-luminous and nonmechanical, for roads; monuments and statuettes of stone, concrete and marble; building glass; prefabricated swimming pools not of metal; aquarium sand