Notebook / Guide
Caring for stone.
Most damage to stone floors comes from the wrong bottle under the sink. A few habits keep them calm for decades.
Natural stone is tough, but it is not inert. Calcium-based stones react with acids, and porous stones drink spills. Care is mostly about respecting those two facts.
Know your stone
- Calcareous stones — limestone, travertine, marble — are sensitive to acids, which etch the surface.
- Siliceous stones — slate, granite, quartzite — are far more resistant to acids, though some slates can still dull.
- Fired clay — terracotta — is not stone, but is cared for in a similar way: sealed, and cleaned gently.
Daily and weekly care
- Remove grit. Sweep, dust-mop or vacuum (with the beater bar off). Grit is abrasive and dulls honed and polished finishes.
- Damp-mop with a pH-neutral cleaner made for stone, diluted as directed. Rinse if the product asks for it.
- Dry wet areas such as bathroom floors to avoid water marks and mineral deposits.
- Use mats at every exterior door.
What to avoid
- Vinegar, lemon, and “natural” acidic cleaners.
- Bleach and ammonia on sealed stone — they break down sealers.
- Abrasive powders and scouring pads.
- General bathroom or tile cleaners, which are often acidic.
- Steam cleaners, unless the stone and sealer manufacturers approve them.
Sealing
An impregnating sealer sits in the pores and slows the absorption of water and oil. It does not make stone stain-proof, and it does not prevent acid etching. To test whether a floor needs resealing, drip a little water on it: if it darkens within a few minutes, it is time.
Stains and marks
| Mark | What it is | What to do |
|---|---|---|
| Dark patch that fades as it dries | Water | Nothing; let it dry |
| Dark patch that stays | Oil or grease absorbed | A stone poultice made for oil stains |
| Dull, lighter spot | Acid etch | Re-honing or polishing by a professional |
| White, powdery bloom | Efflorescence (salts) | Dry-brush; find the moisture source |
For anything more than a small mark, a stone restoration specialist can re-hone, repolish and reseal the whole floor. Well-kept stone floors often last as long as the house.
Questions
Stone care, answered.
Can I clean stone floors with vinegar?
No — not limestone, marble or travertine. Vinegar is an acid and etches calcium-based stone. Use a pH-neutral stone cleaner instead.
How often should natural stone be sealed?
It depends on the stone, the sealer and the traffic. Many floors need resealing every two to five years. The water-drop test tells you when.
Is a steam mop safe for stone floors?
Often not recommended: heat and moisture can weaken sealers and push water into porous stone. Check with the stone and sealer manufacturers first.
How do I remove an oil stain from limestone?
Use a poultice designed for oil stains on stone: it draws the oil out over a day or two. Repeat if needed, then reseal the area.
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