# How to Clean Terrazzo Floors: A Commercial Guide to Routine, Cleaners and Machines

> How to clean commercial terrazzo floors: dust-mop daily, damp-clean with plain water or a neutral cleaner, rinse or recover, and match the machine to the floor size.

- **URL:** https://janitori.com/blogs/equipment-guides/how-to-clean-terrazzo-floors

**In this guide**
- [What does a terrazzo cleaning routine look like?](#routine)
- [How to damp-clean terrazzo, step by step](#steps)
- [Which cleaner is safe for terrazzo?](#cleaner)
- [Which machines work on terrazzo?](#machines)
- [What damages terrazzo?](#avoid)
- [Is terrazzo slippery?](#traction)
- [FAQ](#faq)

To clean a commercial terrazzo floor, dust-mop it daily, damp-clean it with plain water or a neutral-pH cleaner, let the solution work for a few minutes without drying, then rinse or recover it. Skip acids, harsh alkalis and surface waxes.

This guide is for facility and custodial teams caring for terrazzo in lobbies, schools, hospitals, airports and retail floors. It covers the routine, the cleaner, and the machines that fit each floor size.

 **Key takeaways**
- Grit is what wears terrazzo down, so a daily dust-mop does more for the floor than any product. Terrazzo suppliers recommend dust-mopping every day to pick up the grit tracked in from outside.
- Use plain water or a neutral-pH cleaner, give it several minutes to loosen the dirt, and never let it dry on the surface. Then rinse well or recover the solution with a wet vacuum or squeegee.
- Keep acids, harsh alkalis, cleaners with crystallizing salts and plain surface waxes off terrazzo. Suppliers warn these can damage the floor or leave it slippery.
- An auto scrubber scrubs and recovers the solution in one pass on large open floors, while a floor machine suits mid-size rooms, and machine buffing after the floor dries restores shine.

## What Does a Terrazzo Cleaning Routine Look Like?

The routine is a daily dry pass plus a scheduled wet clean. Dust-mop every day, wipe spills as they happen, and damp-clean on a schedule that matches traffic.
- **Dust-mop daily.** Terrazzo & Marble Supply advises a daily dust-mop because grit tracked into the building acts as an abrasive on a hard floor ([care guidance](https://www.tmsupply.com/care-maintenance/)).
- **Blot spills fast.** The same guidance says no spill should be left to soak and dry into the floor.
- **Scrub on a schedule.** That guidance suggests scrubbing at least twice a week for the first two to three months after installation, then about once a week depending on foot traffic. One casino facility profiled by the National Terrazzo & Mosaic Association cleans nightly and scrubs at least twice a week with an auto scrubber ([NTMA](https://ntma.com/terrazzo-a-high-impact-low-maintenance-flooring-choice/)).
- **Ask the installer first.** The installing contractor can name the neutral cleaner and sealer that suit your floor, and whether it is cement-based or epoxy terrazzo.

## How Do You Damp-Clean Terrazzo Step by Step?

Dry-mop, apply plain water or a neutral cleaner and let it sit for several minutes without drying, then rinse or pick up the solution. Finish by buffing once the floor is dry.
- **Close the area.** Put out wet-floor signs and keep foot traffic off the section being cleaned.
- **Dry-mop first.** Remove loose dust and grit so the wet pass does not drag it across the surface.
- **Apply the neutral cleaner.** Use plain water or a neutral (neither acidic nor alkaline) cleaner at the rate printed on its label, and keep the whole section wet so loosened dirt cannot dry back on.
- **Give it a few minutes.** The NTMA-profiled routine lets the cleaner sit for several minutes to dissolve the dirt.
- **Rinse or recover.** Rinse thoroughly with clean water, or use a wet vacuum or squeegee to take up the dirty water. Heavily soiled floors may need repeated rinses.
- **Check the recovery tank.** If you use a wet vacuum or scrubber, look for foam on the first fill, because foam pulled into a vacuum motor damages it.
- **Buff when dry.** The same routine ends with machine buffing after the floor is dry to restore shine.

 **Run it with JANITORI chemistry**

 [Floor Cleaner No.61](/products/floor-cleaner-janitori-no-61)

The routine damp-clean product. It is pH-neutral, low-residue and low-foam at label dilution, and is labeled for mop or cleaning-system use on concrete, stone, ceramic, wood, laminate, marble, granite and terracotta. Terrazzo is not named separately on the label, so test it on a hidden area first and confirm with your installer. The label says no rinse under normal conditions, but terrazzo suppliers advise rinsing well, so rinse or recover the solution on terrazzo anyway.

## Which Cleaner Is Safe for Terrazzo?

Plain water or a neutral-pH cleaner is the safe choice. Terrazzo suppliers advise against all-purpose cleaners with harsh alkalis, acids or crystallizing salts, and against surface waxes.

 | Product type | Use on terrazzo? | Why

 | Plain water or a neutral-pH cleaner | Yes, at the label rate | This is the routine the NTMA-profiled facility uses

 | Neutral cleaner or sealer your installer recommends | Yes, first choice | The installer knows your floor system

 | Acidic cleaners (vinegar, citrus, descalers) | No | Suppliers warn acids can harm terrazzo

 | All-purpose cleaners with harsh alkalis or crystallizing salts | No | Named in supplier guidance as harmful to the floor

 | Surface waxes and all-purpose sealers | No | Supplier guidance says they can leave the floor slippery

 | "Miracle" cleaners and sealers | Not without an opinion first | Supplier guidance says to ask the terrazzo contractor, the supplier or the NTMA before trying one

Where your installer specifies a maintenance product or a water-based sealer, follow that. Use a neutral cleaner for the routine damp-clean.

## Which Machines Work on Terrazzo?

An auto scrubber suits large open floors, and a floor machine suits mid-size rooms and buffing. Match the brush or pad to the installer's guidance rather than a generic default.

 | Floor size or task | Machine | Notes

 | Large lobbies, corridors and concourses | [Auto floor scrubber](/collections/floor-scrubbers) | Scrubs and recovers in one pass; the NTMA-profiled facility uses an auto scrubber with loose brushes. [How to pick the best commercial floor scrubber](/blogs/equipment-guides/best-commercial-floor-scrubber) shows how to size one.

 | Mid-size rooms, scrubbing and buffing | [Floor machine](/collections/floor-machines) such as the [Mercury Cleanmaster TS-19](/products/mercury-cleanmaster-dual-speed-floor-machine-19-apron-175-300-rpm-1-5-hp-d-c-rectified-model-ts-19) | 19 in apron, dual-speed 175/300 RPM, 1.5 HP D/C. Pair it with a wet vacuum for pickup. See [how to use a floor buffer](/blogs/equipment-guides/how-to-use-a-floor-buffer).

 | Restoring shine on a dry floor | Floor machine with the pad your installer specifies | Machine buffing after the floor is dry restores shine. Confirm with the installer before using a high-speed burnisher on a sealed floor.

Replacement brushes are in [machine brushes](/collections/machine-brushes) and pads and drivers are in [floor pads and drivers](/collections/floor-pads-drivers). For cement floors outside terrazzo, see [how to clean a commercial concrete floor](/blogs/equipment-guides/how-to-clean-a-concrete-floor) and [how to clean polished concrete floors](/blogs/equipment-guides/how-to-clean-polished-concrete-floors).

## What Damages Terrazzo Floors?

Grit, the wrong chemistry, residue and spills left to dry cause most terrazzo damage. Each either wears the surface, harms it or leaves it slippery.
- **Skipping the dry pass.** Grit is an abrasive on a hard floor, so a wet pass over loose grit grinds it in.
- **Acids and harsh alkalis.** Supplier guidance names acids, harsh alkalis and crystallizing salts as harmful.
- **Surface waxes.** Plain surface waxes and all-purpose sealers can leave a slippery floor.
- **Letting solution dry.** Cleaner that dries on the surface leaves residue, so keep the section wet and rinse well.
- **Letting spills soak in.** Even a sealed floor should not be left to absorb a spill and dry.

## Is a Terrazzo Floor Slippery When Wet?

It can be, especially with residue or a wax-type coating on it. Rinsing well matters for traction, and supplier guidance says a sealer should carry a slip-resistance rating of at least 0.5. OSHA requires workroom floors to be kept clean and, to the extent feasible, dry ([29 CFR 1910.22(a)(2)](https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.22)).

The National Floor Safety Institute publishes wet-traction resources, and ANSI/NFSI B101.3 is the usual test standard ([NFSI](https://nfsi.org/)). If a clean floor still feels slick, ask the installer or a floor-safety specialist about traction testing.

## Frequently Asked Questions

## What is the best cleaner for terrazzo floors?

Plain water or a neutral-pH cleaner used at the label rate is the safe routine choice. Avoid acids, harsh alkalis and cleaners with crystallizing salts, and follow any product your installer recommends.

## How often should you clean terrazzo floors?

Dust-mop daily. Supplier guidance suggests scrubbing at least twice a week for the first two to three months after installation, then about weekly depending on traffic. High-traffic floors may need it more often.

## Can you use vinegar on terrazzo?

It is best to avoid it. Vinegar is acidic, and supplier guidance warns that acids can harm terrazzo.

## Can you use an auto scrubber on terrazzo?

Yes. One facility profiled by the NTMA cleans terrazzo with an auto scrubber fitted with loose brushes. Use the brush your installer recommends and recover the solution.

## How do you make terrazzo shine again?

Clean off residue and grit, rinse, let the floor dry, then buff with a floor machine. If the shine is worn through, ask a terrazzo professional about resealing or re-polishing.

## Related Guides
- [How to Clean Slate Floors: A Commercial Guide to Routine, Cleaners, Sealing and Machines](/blogs/equipment-guides/how-to-clean-slate-floors)
- [How to Clean Ceramic and Porcelain Tile Floors: A Commercial Guide to Cleaners, Grout and Machines](/blogs/equipment-guides/how-to-clean-ceramic-tile-floors)
- [How to Clean Polished Concrete Floors: A Commercial Guide to Daily Care, Pads and Machines](/blogs/equipment-guides/how-to-clean-polished-concrete-floors)
- [How to Clean a Commercial Concrete Floor](/blogs/equipment-guides/how-to-clean-a-concrete-floor)
- [How to Use a Floor Scrubber: Step-by-Step Auto Scrubber Guide](/blogs/equipment-guides/how-to-use-a-floor-scrubber)
- [How to Use a Floor Buffer: A Commercial Guide to Technique, Pads and the Right Machine](/blogs/equipment-guides/how-to-use-a-floor-buffer)
- [Best Commercial Floor Scrubber: How to Pick One for Your Facility](/blogs/equipment-guides/best-commercial-floor-scrubber) [Shop Floor Scrubbers](/collections/floor-scrubbers) [Shop Floor Cleaner No.61](/products/floor-cleaner-janitori-no-61)