How to Clean Commercial Tile Floors and Grout: A Guide for Custodians and Facility Teams

Rod Michelini founded OneUp Cleaning, which sells the Tornado, NaceCare, EDIC and other machines named here. Where a deck brush and a wet vac will do your job, this guide says so.

To clean commercial tile floors, remove dry soil, then apply a cleaner matched to the soil: neutral for daily mopping, a degreaser for kitchen grease. Let it dwell 5 to 10 minutes, scrub grout with a brush rather than a pad, and pick up the dirty solution with a wet vac or auto scrubber instead of mopping it back in.

That's the whole method, and if your crew already works this way, you can stop here. If your floor still looks grey the morning after a good mop, keep reading, because the mop is usually why. And if years of soil have darkened your grout past what a brush can lift, the spinner tool section below shows how to restore it.

Why does commercial tile still look dirty after you mop?

It's 11 p.m. in a restaurant kitchen. Your night crew mops the quarry tile with a fresh head and a degreaser, the floor looks fine while it's wet, and by the time your breakfast cook arrives it's streaked again, with the grout darker than the tile.

Grout sits below the tile and holds grease in its pores. Your mop drags it out of the grout lines and smears it across the tile, and a clean head only helps until it's loaded. Eight custodians on r/Custodians and r/janitorial describe the same cycle, from school kitchens to restrooms, and Nilfisk's grout guide agrees that residue left on the floor settles back into grout lines and dulls it once it dries.

Too much chemical makes it worse. Over-mixed cleaning solution dries to a tacky film that grabs the next day's soil. If your floor feels sticky underfoot, you're using too much chemical; if it dries blotchy but not sticky, your mop is too wet. Measure every bucket to the label, and use a flat microfiber mop with as little water as you can.

The fix is a change of habit, not a stronger product. Lift the dirty solution off your floor with a wet vac or a scrubber, and the grout has nothing to soak back up.

What cleaner should you use on commercial tile floors?

Match the chemical to the soil, then check it against your tiles. This table covers the soils your crew meets most often:

The tile industry explains that last column. Cement grout is alkaline, so acids dissolve it, and the Tile Council of North America says an alkaline cleaner beats an acid one on grout. Emser tells you to use a pH-neutral cleaner for routine maintenance and to keep acid, ammonia and bleach off natural stone.

The two fit together once you separate daily care from heavy cleaning: a neutral cleaner for the floor you mop every night, a stronger alkaline product for periodic deep cleaning, followed by a thorough rinse.

Kitchen grease is where the advice splits. Metropolitan Ceramics, which makes quarry tile for restaurant kitchens, specifies a neutral cleaner and doubles its strength for grease, from 2 ounces per gallon of hot water for daily mopping to 4 ounces per gallon for grease and stubborn stains. Custodians mostly reach for a degreaser made for animal fat instead, then mix, dwell, scrub and pick it up. If your tile maker names a product, start there, and step up to a food-service degreaser only when your floor won't come clean.

Why bleach won't clean your grout

You'll often see bleach recommended for stained grout. Custodians who clean commercial floors disagree, and the reason is chemistry: bleach disinfects, but it isn't a detergent, so it doesn't lift soil out of grout any better than water does. One worker poured five gallons of bleach on white grout and the grout never turned white, and seven custodians across r/Custodians say the same.

The CDC backs that order: clean first, then disinfect, because dirt makes it harder for the chemical to reach germs. There's a safety reason too. Bleach mixed with an acid, such as some toilet bowl cleaners, gives off chlorine gas, and bleach mixed with ammonia produces chloramines, so a restroom where your crew already uses an acid descaler is the worst place to add it.

Four custodians still use bleach in their routine, so this isn't unanimous. Clean with a detergent, then disinfect. Our restroom cleaning guide covers contact times and urine odor.

Peroxide cleaners for dirty grout

For grout that's gone dark, hydrogen peroxide cleaners come up again and again. A custodian in a 50 year old building got the best results on light grey grout gone almost black by pairing one with a stiff brush on a rotary machine, and five others back the combination. Most of those voices sit in one thread, so treat it as a strong lead rather than a rule.

How to clean commercial tile floors, step by step

Use this sequence for a deep clean, weekly in kitchens, busy restrooms and other high-traffic areas, and less often in quiet lobbies:

1. Post wet floor signs to prevent a slip, and keep the area closed until the floor is dry.
2. Remove dry soil first. Sweep, dust mop or vacuum, because debris plus water turns into mud in your grout, and loose debris scratches tile once a machine starts scrubbing.
3. Apply the cleaning solution at label dilution with a pump sprayer or your machine's solution feed.
4. Let it dwell. Daltile tells commercial crews to let the chemical dwell 5 to 10 minutes before machine scrubbing, depending on the product. Keep it wet until you scrub.
5. Agitate with a brush. Bristles reach into the grout lines, while a pad rides over them.
6. Recover the dirty solution with a wet vac, an auto scrubber or a squeegee to a floor drain, before it dries. On a restoration job, a spinner tool on an extractor rinses and recovers in the same pass.
7. Rinse with clean water and recover again, so no residue stays behind.
8. Dry the floor with a squeegee, a flat mop or an air mover before you reopen it.

If you skip step 6, you've done steps 3 through 5 for nothing. Our wet dry vac guide shows you how to set one up for wet pickup and squeegee work.

How to clean grout on tile floors

Work the grout lines in both directions, up and down and then side to side, so your bristles reach both walls of each joint. Use a hand grout brush or a drill brush in corners, behind toilets and around partitions where a machine can't reach. On grout that hasn't been scrubbed in years, plan on two passes, because the first often only reaches the top layer of buildup.

Your brush matters as much as your chemical. A black stripping pad is the most aggressive pad you can buy, and it still can't get down into the grout. Our guide to brush vs pad on a floor scrubber explains which bristle grade suits ceramic, porcelain and quarry tiles.

What's the best way to clean a large area of tile floors?

A scrubber that brushes and recovers in one pass. On an open tile floor, an auto scrubber lays down solution, brushes and vacuums the slurry before it settles back into the grout, so you cover steps 3 through 8 in one trip. Cylindrical decks suit grout best, because their counter-rotating brushes ride down into the joints, and Daltile's guidance for weekly commercial cleaning calls for a cylindrical machine with a soft to medium bristle brush. The guide to disk, cylindrical and orbital heads explains the difference.

Size your equipment to the room:

Our prices as of October 15, 2026.

If you clean one small restroom or a kitchenette, you don't need a scrubber: a deck brush, the right chemical and a wet vac give you the same floor for a fraction of the price. A scrubber earns its place once your square footage makes hand brushing eat the night.

For floors that need restoring rather than cleaning, such as kitchen grout nobody has touched in years, a spinner tool on an extractor does what a scrubber can't, and the next section covers it. You'll find the full scrubber ranges in our cylindrical floor scrubbers and CRB machines collections.

Not sure which fits your building? Send your square footage, tile type and cleaning frequency through the contact page, or call (855) 601-5678, and we'll give you a straight answer.

How do you restore grout with a spinner tool?

To restore grout with a spinner tool, pre-spray the floor, scrub the grout lines with a brush or CRB, run the spinner over the open floor while your extractor vacuums the rinse water, then finish the edges with a hand tool. Save it for restoration, not nightly cleaning. Its spray bar rotates under the head and blasts the grout lines while your extractor vacuums the dirty water up through the same head. The EDIC Revolution ($1,281) and Hydro-Force's SX-12 both clean a 12 inch path, and the SX-15 widens it to 15 inches.

Our prices as of October 15, 2026.

Your extractor has to reach the pressure the tool's maker lists. EDIC asks for 800 psi or more, and the tile cleaners in the videos below run about 900 to 1,100 psi, with one warning that going much higher can blow grout out. Our tile and grout machine guide covers pressure, cost and whether your carpet extractor can run one.

Once you have the tool, the job runs like this:

1. Inspect and prep. Look for cracked, soft or missing grout before you spray, because years of kitchen grease can leave grout soft or eat it away. Move what you can, and mask cabinets, walls and carpet edges against overspray, as EDIC's manual asks.
2. Pre-spray and keep it wet. If the solution dries before you get to it, one tile cleaner says to rewet it with pre-spray rather than cleaning it dry.
3. Scrub the grout lines. A crew restoring a clubhouse floor nobody had cleaned in five years laid the solution down, waited a few minutes, scrubbed with a CRB, then ran the spinner. Carpet cleaners on Reddit work the same way: one has to scrub every grout line before the spinner, another scrubs with a CRB, then extracts with an SX-12.
4. Spin the open floor. Hydro-Force spaces the SX-12's handles for side-to-side or front-to-back strokes, so use whichever suits the room. Crews pick the 15 inch head for big open rooms like restaurants, and one Palm Springs cleaner says the choice depends on open areas versus narrow spaces.
5. Detail the edges. A round head leaves corners and the space under equipment. One restaurant crew spins the open centers, then trims edges and gets under things with a hard surface wand, and EDIC makes a teardrop-shaped Countertop Revolution for tight spaces.
6. Dry, then seal if you plan to. Keep the area closed until it's dry, then follow the sealing advice below.

Plan your time from a test area. Reports range from about 700 square feet in an hour to an hour and a half to as much as 2,000 square feet an hour, so time a small section before you quote or schedule the whole floor.

How to clean tile by area: kitchens, restrooms and lobbies

Restaurant kitchens and quarry tile

Unglazed quarry tile is common in commercial kitchens, and its surface and grout lines hold soil a mop can't reach. Metropolitan Ceramics' kitchen guide has your crew sweep and mop daily, brush the grout joints weekly, and push the solution to the drain or pick it up with a wet vac. It also says never to wax unglazed quarry tile, and to check for cracked grout before you clean.

Restrooms

Restroom grout collects urine salts, mineral scale and stains, so your room can smell even after it's mopped. Clean with an alkaline product and a brush, pick it up, and use an acid descaler only where your tile and grout can take it. The restroom guide covers enzymes, floor drains and disinfecting.

Lobbies and entrances

Your lobby tile mostly fights grit from outside, which scratches glazed tile and fills the grout. Entrance mats catch it at the door, one of Nilfisk's basics, and a daily dust mop and neutral cleaner handle the rest.

How often should you clean commercial tile?

Set your schedule by traffic and soil. This table follows the tile makers' daily and weekly routines:

Daltile ties its weekly autoscrub to commercial spaces, and the quarry tile guide puts brushing the joints on your weekly list. Raise your frequency where soil and stains arrive fastest.

Should you seal commercial grout?

Usually, but don't expect a sealer to do your cleaning. The Tile Council of North America says sealing is a good idea for cement grout, and the quarry tile maker allows a water-based penetrating sealer while banning surface sealers. Daltile adds the caveat most crews learn the hard way: neither sealing nor epoxy grout guarantees against buildup or discoloration, and one custodian scrubbed and sealed old quarry tile grout that still got dirty. Seal cement grout once it's clean, and keep your maintenance routine either way.

Be honest with your client about what's possible. Some grout is dark by design: a maintenance tech who lays quarry tile uses dark grout on purpose, and no machine will make it white. The tile and grout machine guide explains what a realistic restoration looks like.

Frequently asked questions

What should you not clean tile floors with?

Skip oil and wax based soaps, which the TCNA warns your grout will absorb; harsh chemicals like acid and vinegar on cement grout and natural stone; steel wool and abrasive pads, which Emser rules out; bleach as a cleaner; and wax on quarry tile. Never mix two chemicals in the same bucket.

Can you use dish soap on commercial tile?

You can, but it foams, it's hard to rinse, and the film it leaves attracts soil. A neutral tile cleaner made for commercial floor cleaning does the job without the residue.

Does VCT need a different routine?

Yes. Vinyl composition tile is vinyl flooring protected by a floor finish, so you maintain it by scrubbing, recoating and periodic stripping rather than by cleaning grout.

Every machine we sell is covered by our 30-day return policy, so if the one you pick doesn't suit your floors, you can send it back.

Related reading: Professional tile and grout cleaning machine · How to clean a restroom · Floor scrubber brush vs pad · Commercial wet dry vacuums