What does a Terrazzo Worker and Finisher do?

Apply a mixture of cement, sand, pigment, or marble chips to floors, stairways, and cabinet fixtures to fashion durable and decorative surfaces.

Jobs Roles

  • 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.
  • 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.
  • Mold expansion joints and edges, using edging tools, jointers, or straightedges.
  • 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.
  • Grind curved surfaces or areas inaccessible to surfacing machine, such as stairways or cabinet tops, with portable hand grinder.
  • Grind surfaces with a power grinder or polish surfaces with polishing or surfacing machines.
  • Position and secure moisture membrane and wire mesh in preparation for pouring base materials for terrazzo installation.
  • Modify mixing, grouting, grinding, or cleaning procedures, according to type of installation or material used.
  • Wash polished terrazzo surface, using cleaner and water, and apply sealer and curing agent according to manufacturer's specifications, using brush or sprayer.
  • 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.
  • 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.
  • Clean installation site, mixing and storage areas, tools, machines, and equipment, and store materials and equipment.
  • Fill slight grinding depressions with matching grout material and hand trowel for a smooth, uniform surface.
  • Chip, scrape, or grind high spots, ridges, or rough projections to finish concrete, using pneumatic chisel, hand chisel, or other hand tools.
  • Clean chipped area, using wire brush, and feel and observe surface to determine if it is rough or uneven.
  • Move terrazzo installation materials, tools, machines, or work devices to work areas, manually or using wheelbarrow.
  • Build wooden molds, clamping molds around areas to be repaired, or setting up frames to the proper depth and alignment.
  • Signal truck driver to position truck to facilitate pouring concrete and move chute to direct concrete on forms.
  • Produce rough concrete surface, using broom.
  • Precast terrazzo blocks in wooden forms.
  • Spread roofing paper on surface of foundation and spread concrete onto roofing paper with trowel to form terrazzo base.
  • Remove frames when the foundation is dry.
  • Wet concrete surface and rub with stone to smooth surface and obtain specified finish.
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