Epoxy terrazzo is a thin-set resin system best for interior commercial floors that need bold color, custom patterns, and low maintenance. Cementitious terrazzo is a thicker cement-based system suited to exterior work and projects with specific structural or substrate conditions. Most modern commercial interiors use epoxy; cement-based systems earn their place outdoors and in specific structural situations.
For most commercial projects, choosing terrazzo comes down to one early decision: epoxy or cementitious. Both produce the seamless, durable, long-lasting floor terrazzo is known for. They install differently, suit different conditions, and offer different design possibilities. Making the call at the design stage, while it can still shape the slab detailing and the schedule, saves cost and coordination problems later.
Here is a plain look at the two families of terrazzo systems and how to decide between them.
Epoxy terrazzo vs. cementitious terrazzo at a glance
| Factor | Epoxy terrazzo | Cementitious terrazzo |
| Binder | Epoxy resin | Cement-based |
| Typical thickness | 1/4 to 3/8 inch (thin-set) | Thicker, varies by system |
| Best for | Interior commercial floors | Exterior work and specific structural conditions |
| Color range | Wide, with sharp color control | More limited, traditional look |
| Custom patterns and logos | Excellent | More constrained |
| Weight | Lightweight, good for multi-story | Heavier |
| Chemical and moisture resistance | High, non-absorbent | Lower |
| Long-term maintenance cost | Lowest of the terrazzo systems | Higher |
What is epoxy terrazzo?
Epoxy terrazzo is a thin-set system. A resin matrix, filled with marble, quartz, granite, or glass chips, is poured over a prepared concrete slab at a nominal thickness of 1/4 to 3/8 inch. Once it cures, it is ground and polished to a smooth, uniform surface.
It is the most common choice for modern commercial interiors, and for good reason. The resin binder allows a wide range of matrix colors, sharp color control, and intricate multi-color patterns that cement-based systems cannot match. It is lightweight, which makes it well suited to multi-story buildings, and it resists chemicals and moisture, which matters in healthcare, laboratory, and food-service settings. Because it is non-absorbent, it also carries the lowest long-term maintenance cost of the terrazzo systems.
If a project calls for bold color, custom logos, or complex designs, epoxy is usually the answer. You can review the full technical profile in the NTMA’s epoxy terrazzo specification.
What is cementitious terrazzo?
Cementitious terrazzo uses a cement-based binder rather than resin. It is the traditional form of terrazzo, and it remains the right choice in specific conditions, particularly exterior applications and projects where the substrate or structure calls for a thicker, cement-based system.
Cementitious terrazzo is not a single product. It covers several systems, each suited to different structural needs:
- Sand cushion is the most robust cement system, built over a reinforced underbed with an isolation membrane, used where the floor needs to move independently of the structure.
- Bonded terrazzo fills greater recessed depth where the slab allows it.
- Monolithic terrazzo is placed directly on a concrete slab where conditions are favorable.
- Polyacrylate adds a polymer to the cement matrix, allowing thinner cement-based applications.
The full set of cement systems and their technical details are catalogued in the NTMA’s types and systems guide.
How to choose between epoxy and cementitious terrazzo
The right system depends on the building, not on preference. A few questions usually settle it.
What is the substrate and structure?
Slab condition, recess depth, and whether the floor needs to move independently of the structure often point directly to a specific system. A structural engineer’s input on the slab matters here.
Is the floor interior or exterior?
Exterior work generally calls for a cement-based system, which handles outdoor conditions and movement better. Most interior commercial work is a good fit for epoxy.
What are the design goals?
If the design depends on a broad color range, custom patterns, or logos, epoxy offers the most freedom. If the look is more traditional, or the budget favors a cement system where conditions allow, cementitious may suit it well.
Are there chemical or moisture concerns?
Healthcare, laboratory, and similar environments benefit from epoxy’s chemical resistance and non-absorbent surface, which stands up to frequent cleaning and spills.
How many stories?
Epoxy’s lighter weight is an advantage in multi-story construction, where floor loading is a design consideration.
In practice, most modern commercial interiors land on epoxy, while cement systems earn their place in exterior work and specific structural situations. The important thing is to make the call early, while it can still shape the slab detailing and the schedule.
Why the installer matters as much as the system
Terrazzo is only as good as its installation. The system choice sets the direction, but substrate preparation, divider placement, pouring, grinding, and sealing all determine how the finished floor performs and how long it lasts. A poorly prepared slab or mismanaged divider layout can undermine even the best-specified system.
David Allen Company installs both epoxy and cementitious terrazzo as a turnkey operation. Our terrazzo teams have earned more National Terrazzo and Mosaic Association Honor Awards for quality workmanship than all other terrazzo contractors in the Southeast combined, and our terrazzo department has installed more than 50 million square feet of terrazzo across commercial, institutional, and government projects. If you are weighing terrazzo for an upcoming project, we can help you match the system to the building.
Request an estimate or see our terrazzo projects.
Frequently asked questions
Is epoxy terrazzo better than cementitious terrazzo? Neither is universally better. Epoxy suits most interior commercial floors, especially where color, custom design, and low maintenance matter. Cementitious suits exterior applications and projects with specific structural or substrate conditions. The building determines the right choice.
How thick is epoxy terrazzo? Epoxy terrazzo is a thin-set system with a nominal thickness of 1/4 to 3/8 inch, placed over a prepared concrete slab.
Can terrazzo be used outdoors? Yes. Exterior terrazzo generally uses a cement-based system, which handles outdoor conditions and movement better than thin-set epoxy.
Which terrazzo is lowest maintenance? Epoxy terrazzo carries the lowest long-term maintenance cost because its surface is non-absorbent, making it easy to clean and resistant to staining.
Is terrazzo a good choice for healthcare or lab environments? Epoxy terrazzo is well suited to healthcare and laboratory settings because it is non-absorbent and chemical-resistant, and its seamless surface leaves few places for dirt or bacteria to collect.