Limestone is softer and more porous than marble, which means it asks for different day-to-day care. What to do, what not to do, and when a professional visit is actually worth it.
Limestone is the quiet backbone of many London period properties. Warm underfoot, durable, forgiving of daily life, and more affordable than marble. But limestone is softer than marble and significantly more porous, which means the rules for looking after it differ in important ways from marble or granite. Get the basics right and a limestone hallway laid in 1890 will still look right in 2090.
Daily care
Dust-mop or vacuum first, always. Grit on a limestone floor acts like fine sandpaper under foot traffic, and even the best sealer does not fully protect against abrasion. A quick dust-mop before any wet cleaning removes about 80 per cent of the wear mechanism.
When you wash, use a pH-neutral stone cleaner, diluted as directed on the label. Do not use general-purpose household cleaners, limescale remover, vinegar, lemon juice, or bleach. All of these are acidic enough to etch limestone. Cream cleaners and scouring pads should also stay away from limestone, they leave fine scratches.
Rinse after washing. Soap residue dulls the surface over time and traps more dirt than bare stone would on its own.
Weekly care
A thorough pH-neutral mop once a week is enough for most residential floors. In kitchens and entrance halls with heavier use, twice weekly is better. Change the mop water halfway through a large area, otherwise you are just moving dirt around.
Spot-clean spills immediately. Blot, do not rub. Any acidic spill (red wine, tomato sauce, fruit juice, salad dressing, white wine) should be blotted within minutes to prevent etch marks that will need mechanical polish-out later.
Monthly check
Once a month, do a water-drop test in two or three areas. Place a teaspoon of water on the surface and time how long it holds its shape. If the drop still beads and sits on the surface after 10 minutes, your sealer is working well. If the drop soaks in within a minute, your sealer is failing and it is time to book sealing and impregnation. Limestone drinks sealer faster than most stones, particularly French Moleanos and Portland, so do not be surprised if you need re-sealing every 18 to 30 months rather than every three years.
Yearly
Consider a professional deep clean once a year in heavy-use areas (kitchens, entrance halls, boot rooms). A proper deep clean will extract years of accumulated residue that domestic cleaning leaves behind, and will reveal whether the underlying stone needs honing or just another sealing cycle. Deep cleaning limestone is always done with alkaline chemistry, never acid.
Every two to three years, re-seal the floor. This is usually a half-day job and the stone is back in normal use within 48 hours.
When to call a specialist
- Visible dulling across the floor that ordinary cleaning no longer improves.
- Stains that have not responded to a pH-neutral clean within 24 hours.
- Chips, cracks or lippage along grout lines (this is a crack and chip repair job, not a polish).
- Water soaking in rapidly during the water-drop test (sealer failure).
- Before or after any building work on the property. A floor under builders' boots for three months of refurbishment usually needs a reset afterwards.
A word on stones sold as "limestone" that are not
Hardstone suppliers occasionally sell honed travertine or dolomitic stones under a "limestone" label. The care rules are similar but not identical. If you are unsure what your floor actually is, a site visit and a short porosity test will confirm it in five minutes.
Limestone rewards attention. A well-cared-for limestone floor in a Victorian or Edwardian London house will comfortably outlive the people living on it, and comes back from decades of neglect with the right specialist hand. If your floor has passed the "regular care is enough" stage, get in touch and we will tell you honestly what is needed.