Terrazzo Finisher apprenticeship

Description of an apprenticeship as a Terrazzo Finisher

Table of Contents

Terrazzo Finisher apprenticeship

DOT code: 861.664-014, O*NET code:47-2053.00

Visit the Occupational Outlook Handbook for a detailed description of this trade. Type the trade name in the search box and hit enter.


Supplies and mixes construction materials for TERRAZZO WORKER (construction) 861.381-046, applies grout, and finishes surface of installed terrazzo: Moves terrazzo installation materials, tools, machines, and work devices to work areas, manually or using wheelbarrow. Measures designated amounts of ingredients for terrazzo or grout, using graduated containers and scale, following standard formulas and specifications, and loads portable mixer, using shovel. Mixes materials according to experience and requests from TERRAZZO WORKER (construction) 861.381-046, and dumps mixed materials that form base or top surface of terrazzo into prepared installation site, using wheelbarrow. Applies curing agent to installed terrazzo to promote even curing, using brush or sprayer. Grinds surface of cured terrazzo, using power grinders, to smooth terrazzo and prepare for grouting. Spreads grout across terrazzo to fill surface imperfections, using trowel. Fine grinds and polishes surface of terrazzo, when grout has set, using power grinders. Washes surface of polished terrazzo, using cleaner and water, and applies sealer, according to manufacturer's specifications, using brush. Installs grinding stones in power grinders, using handtools. Cleans installation site, mixing and storage areas, tools, machines, and equipment, using water and various cleaning devices. Stores terrazzo installation materials, machines, tools, and equipment. May modify mixing, grouting, grinding, and cleaning procedures according to type of installation or material used. May assist TERRAZZO WORKER (construction) 861.381-046 to position and secure moisture membrane and wire mesh prior to pouring base materials for terrazzo installation. May spread marble chips or other material over fresh terrazzo surface and press into terrazzo, using roller. May cut divider and joint strips to size as directed. May assist TERRAZZO WORKER (construction) 861.381-046 to lay terrazzo. May cut grooves in terrazzo stairs, using power grinder, and fill grooves with nonskid material.

Work Process Schedule

Task Hours
A. Prepare all types of sub-surfaces for terrazzo. 237.5 - 250
B. Use and maintain all tools of the trade. 170 - 200
C. Handle and move all job-site materials from stockpile to point of installation. 127.5 - 150
D. Float bed-sand cushion, isolation membrane wire mesh and screeding underbed. 254.5 - 270
E. Install divider strips and glue divider strips. 170 - 200
F. Place terrazzo mixture in panels and trowel to top of strips and seeding of additional strips. 373.5 - 410
G. Mix various types of mortar and chips 255 - 300
H. Then set epoxy, polyester, polyacrylate, and other artificial, simulated products. 425 - 500
I. Install seamless floors. 170 - 200
J. Clean, seal, grout, and protect terrazzo. 170 - 200
K. Install membrane over cracks. 51 - 60
L. Machine grind and polish, acid wash and select, and use other polishing compounds and methods. 968.5 - 1110
M. Apply stone aggregate. 127.5 - 150
(Every 2,000 hours = one year) total hours: 3500 - 4000

Related technical instruction

The Commonwealth of Massachusetts requires 150 hours each year of related technical instruction which must be mastered by the apprentice in order to successfully complete the program. The following is a general listing of instruction topics for this trade. For further information, please call the Division of Apprentice Standards at (617) 626-5409.

OSHA construction safety 1926 (30 hours)
CPR/first aid
Scaffold safety qualification
Drugs and alcohol
Diversity in the workplace
Materials safety data sheet
Trade and labor history
Use of tools and equipment
Terrazzo Industry
Mortar mixing/bonding materials
Sub-surface preparations
Terrazzo finishing
Trade mathematics
Blueprint reading
Advanced topics/new technologies

Additional Resources