How to Clean Terrazzo Floors: The Complete Care and Restoration Guide

Terrazzo is one of the most beautiful and durable flooring materials ever created — a composite of marble, quartz, granite, or glass chips set in a cement or epoxy binder, then ground and polished to a smooth, glossy finish. Found in everything from mid-century homes to luxury modern spaces, terrazzo can last a lifetime with proper care. But cleaning it incorrectly can dull, etch, or permanently damage the surface.

This guide covers everything you need to know about how to clean terrazzo floors, from daily maintenance to deep restoration, including the products and methods that work — and the ones you must avoid.

Understanding Your Terrazzo

Before you start cleaning, it helps to know what type of terrazzo you have. The two main types respond slightly differently to cleaning products:

Most terrazzo in older homes is cement-based, which is more porous and sensitive to acidic cleaners. Newer terrazzo installations tend to use epoxy binders, which are denser and more chemical-resistant. When in doubt, treat your terrazzo as cement-based and use the gentlest cleaning approach.

Daily and Weekly Cleaning

Daily Care

The simplest thing you can do to protect terrazzo is also the most effective: dust mop daily. Use a dry microfiber dust mop to pick up dirt, dust, and grit that would otherwise act as abrasives under foot traffic. This single habit prevents more surface damage than any product or treatment. Avoid straw brooms, which can scratch polished terrazzo over time.

Weekly Mopping

Once a week, damp-mop the floor with a pH-neutral cleaner diluted in warm water. pH-neutral means the product has a pH between 6.5 and 7.5 — neither acidic nor alkaline. Products specifically designed for terrazzo and natural stone are ideal. Apply the cleaning solution with a microfiber mop, working in sections. Rinse the mop frequently in clean water to avoid spreading dirty water across the floor.

Recommended pH-neutral cleaners for terrazzo include:

• Stone-specific cleaners (Lithofin, Fila Cleaner, StoneTech Stone & Tile Cleaner)
• Diluted Castile soap (Dr. Bronner’s — use sparingly to avoid residue)
• Purpose-made terrazzo cleaners (DiversiTech, Prosoco)

After mopping, go over the floor once more with clean water to remove any cleaner residue, then dry with a clean microfiber cloth or allow to air dry. Residue buildup from cleaning products is one of the main causes of dull terrazzo.

What to Avoid on Terrazzo Floors

Terrazzo is durable but not indestructible. The following products and practices will damage it — some permanently:

• Vinegar: Acetic acid etches cement-based terrazzo, leaving dull spots that can only be fixed by professional re-polishing. Never use vinegar on terrazzo, even diluted.
• Lemon juice or citrus cleaners: Same problem as vinegar — citric acid attacks the cement binder and calcium in marble chips.
• Abrasive cleaners and powders: Products like Comet, Ajax, or Bon Ami contain abrasive particles that scratch the polished surface.
• Steel wool or abrasive pads: These scratch and dull the surface permanently.
• Ammonia-based cleaners: While less damaging than acids, ammonia can strip sealers and leave a hazy film over time.
• Bleach: Chlorine bleach can discolor the binder and strip sealers. Use it only as a last resort for specific stains, heavily diluted, and rinse immediately.
• Oil-based cleaners: These leave residue that attracts dirt and can penetrate unsealed terrazzo, causing dark stains.

Stain Removal Guide

Different stains require different approaches on terrazzo. The key rule is to act quickly — the longer a stain sits, the deeper it penetrates, especially on cement-based terrazzo.

For a poultice treatment, mix the active ingredient (hydrogen peroxide or baking soda) into a thick paste with water. Apply it to the stain about 1/4 inch thick, cover with plastic wrap, tape the edges, and leave it for 12 to 24 hours. The poultice draws the stain out of the stone as it dries. Remove, rinse with clean water, and repeat if needed.

Polishing Terrazzo Floors

Over time, even well-maintained terrazzo loses its luster from foot traffic. Polishing restores the glossy finish and can be done at different levels depending on the condition of the floor.

Light Polishing (DIY)

For minor dullness, a light buff with a floor polishing machine and a white or beige polishing pad can restore shine. You can rent a floor buffer from most home improvement stores. Apply a small amount of terrazzo polishing powder (tin oxide or aluminum oxide based) and buff in overlapping passes. This is suitable for floors that are still in good overall condition but have lost their top-level gloss.

Professional Diamond Polishing

For significantly worn or damaged terrazzo, professional diamond polishing is the gold standard. This process uses progressively finer diamond-impregnated pads (typically 50-grit through 3,000-grit) to grind down the surface and build up a deep, natural polish without any coatings. Professional polishing costs $3 to $8 per square foot but produces results that last for years.

Crystallization

Crystallization is a professional chemical process that reacts with the calcium in cement-based terrazzo and marble chips to create a hard, glossy surface layer. A steel wool pad and an acidic crystallizing solution are used together — the friction and chemistry combine to harden and polish the surface simultaneously. Crystallization produces a brilliant shine and added surface hardness. It costs $2 to $5 per square foot and is typically re-applied every 1 to 3 years in residential settings.

Sealing Terrazzo Floors

Cement-based terrazzo is porous and should be sealed to prevent stain penetration. Epoxy terrazzo is naturally non-porous and generally does not require sealing, though a sealer can add extra protection and enhance appearance.

Types of Terrazzo Sealers

• Penetrating sealers (impregnators): Soak into the terrazzo and protect from within without changing the surface appearance. They repel water and oil-based stains while allowing the stone to breathe. Best for a natural, matte look. Reapply every 3 to 5 years.
• Topical sealers: Sit on the surface and create a protective film. They can add gloss but may yellow over time, require stripping before reapplication, and can make the floor slippery when wet. Less commonly recommended for terrazzo today.

For most residential terrazzo floors, a high-quality penetrating sealer is the best choice. Apply it after the floor has been cleaned and polished, following the manufacturer’s instructions. For more information on stone floor care, visit our stone flooring guide and our article on how to clean stone floors.

Restoring Dull or Neglected Terrazzo

If you have just moved into a home with decades-old, neglected terrazzo under old carpet or vinyl, restoration is almost always worthwhile. Terrazzo is one of the few flooring materials that can be brought back from truly rough condition. Here is the typical restoration process:

1. Strip existing coatings: Remove any old wax, sealers, or adhesive residue with a commercial floor stripper appropriate for terrazzo.
2. Repair cracks and chips: Fill any cracks or missing aggregate with color-matched epoxy filler. A professional terrazzo repair specialist can match the original color and aggregate almost invisibly.
3. Grind and polish: Use diamond grinding pads from coarse to fine grit to level the surface and restore the polish.
4. Seal: Apply a penetrating sealer to protect the freshly exposed surface.

Full terrazzo restoration costs $5 to $15 per square foot, which is significantly less than replacing the floor with new terrazzo ($25-$50+ per sq ft) or most other premium flooring options. The investment is well worth it for a floor that can last another 50+ years. Learn more about terrazzo at our terrazzo flooring page.

Terrazzo Floor Care Schedule