Terrazzo Workers and Finishers

Key Responsibilities

• Signal truck driver to position truck to facilitate pouring concrete and move chute to direct concrete on forms.
• Build wooden molds, clamping molds around areas to be repaired, or setting up frames to the proper depth and alignment.
• Fill slight grinding depressions with matching grout material and hand-trowel for a smooth, uniform surface.
• Blend marble chip mixtures, place into panels, and push a roller over the surface to embed the chips.
• Measure designated amounts of ingredients for terrazzo or grout, according to standard formulas and specifications, using graduated containers and scales, and load ingredients into portable mixer.
• Spread, level, or smooth concrete or terrazzo mixtures to form bases or finished surfaces, using rakes, shovels, hand or power trowels, hand or power screeds, or floats.
• Chip, scrape, or grind high spots, ridges, or rough projections to finish concrete, using pneumatic chisel, hand chisel, or other hand tools.
• Spread roofing paper on surface of foundation and spread concrete onto roofing paper with trowel to form terrazzo base.
• Produce rough concrete surface, using broom.
• Position and secure moisture membrane and wire mesh in preparation for pouring base materials for terrazzo installation.
• Wet surface to prepare for bonding, fill holes and cracks with grout or slurry, and smooth with a trowel.
• Repair concrete by cutting out damaged areas, drilling holes for reinforcing rods, and positioning reinforcing rods, using power saw and drill.
• Remove frames when the foundation is dry.
• Mix cement, sand, and water to produce concrete, grout, or slurry, using hoe, trowel, tamper, scraper, or concrete-mixing machine.
• Sprinkle colored marble or stone chips, powdered steel, or coloring powder over surface to produce prescribed finish.
• Precast terrazzo blocks in wooden forms.
• Cut metal division strips and press them into the terrazzo base for joints or changes of color to form designs or patterns or to help prevent cracks.
• Wet concrete surface and rub with stone to smooth surface and obtain specified finish.
• Mold expansion joints and edges, using edging tools, jointers, or straightedges.
• Modify mixing, grouting, grinding, or cleaning procedures, according to type of installation or material used.
• Clean chipped area, using wire brush, and feel and observe surface to determine if it is rough or uneven.
• Wash polished terrazzo surface, using cleaner and water, and apply sealer and curing agent according to manufacturer's specifications, using brush or sprayer.
• Move terrazzo installation materials, tools, machines, or work devices to work areas, manually or using wheelbarrow.
• Grind surfaces with a power grinder, or polish surfaces with polishing or surfacing machines.
• Grind curved surfaces or areas inaccessible to surfacing machine, such as stairways or cabinet tops, with portable hand grinder.
• Clean installation site, mixing and storage areas, tools, machines, and equipment, and store materials and equipment.