How to Care for Natural Stone Floors — The Complete Guide

The Golden Rule: pH-Neutral Cleaners Only

The single most important maintenance rule for natural stone — particularly marble, limestone, and travertine — is to use only pH-neutral (pH 7) cleaning products. Acidic cleaners (including vinegar, lemon juice, many bathroom cleaners, and even some "stone-safe" products) dissolve the calcium carbonate in calcareous stones, causing invisible but cumulative surface etching that dulls the polish over time.

Daily Cleaning

For day-to-day maintenance: sweep or dust-mop to remove grit (grit acts as sandpaper underfoot and scratches polished surfaces more effectively than most people realise), then damp-mop with warm water and a few drops of pH-neutral stone cleaner. Rinse mop frequently. Avoid steam mops on marble — the heat and moisture penetration can cause long-term issues.

Sealing

Marble, limestone, travertine, and sandstone are porous and require sealing to resist staining. Granite is less porous and may require sealing less frequently or not at all.

How to test: Drop a few drops of water on the stone surface. If the water beads, the sealer is still active. If it absorbs within 5 minutes, it's time to reseal.

How often: High-traffic floors: every 1–2 years. Low-traffic areas: every 3–5 years. Kitchen countertops: annually.

Sealer types: Impregnating sealers (penetrate the stone and don't change the appearance) are preferred for floors and countertops. Topical sealers (sit on the surface) can look plasticky and peel — generally avoid on natural stone.

Dealing With Stains

• Oil-based stains (cooking oil, grease): Apply a poultice of baking soda + water or talc + hydrogen peroxide. Leave 24–48 hours, remove, rinse.
• Biological stains (mould, mildew): Diluted bleach solution (test in inconspicuous area first) on granite. For marble, use hydrogen peroxide.
• Rust stains: Rust removers formulated specifically for stone (not generic rust removers, which are acidic and will etch marble).

Etching vs Staining

These are different problems. A stain is discolouration from a substance absorbed into the stone — often removable with the right poultice. An etch mark is physical damage to the surface from acid contact — it appears as a dull spot on polished stone and cannot be removed without re-polishing. Prevention (sealing, prompt cleanup of acidic spills) is the only cure.

Professional Restoration

Deep scratches, severe etching, and loss of polish require professional diamond grinding and re-polishing. This should be factored into long-term maintenance planning for marble floors in commercial environments — typically every 5–10 years depending on traffic.