How to Clean Untreated Limestone

Written by april dowling | 13/05/2017
How to Clean Untreated Limestone
Clean untreated limestone with mild cleaning solutions. (George Doyle/Stockbyte/Getty Images)

Distinguished by its versatility and natural ambience, limestone is a sedimentary rock indigenous to caves and sea beds around the world. Limestone's durability makes it ideal for floor tiles, patios, driveways and other residential applications. Although dense, limestone is generally porous unless sealed. Untreated, natural limestone is more susceptible to liquids, stains and damage than sealed limestone. However, some homeowners appreciate the natural appearance of untreated limestone. Like treated limestone, however, untreated limestone inevitably accumulates dirt and grime. Regularly clean untreated limestone to preserve its natural appearance.

Sweep the untreated limestone with a broom to gather dust and grime from the surface. Remove as much loose grit as possible.

Pour a few drops of liquid dish soap into a cleaning bucket. Fill the cleaning bucket with 1 gallon of warm water.

Fill another ordinary cleaning bucket with plain warm water.

Immerse a microfiber mop in the soapy water. Mop a 3-by-3-foot section of limestone with the soapy water, removing all grit and grime from the area.

Rinse the mop thoroughly in plain water. Mop the clean 3-by-3-foot portion of limestone with the water to rinse away the soapy residue.

Mop the remaining dirty 3-by-3-foot sections of untreated limestone with the soapy water until the entire limestone surface is spotless. Rinse each section thoroughly with fresh water after mopping. Replace the rinse water regularly.

Let the clean limestone surface air-dry completely.


Substitute a microfiber cloth for the microfiber mop if you're cleaning untreated limestone walls, countertops or other surfaces besides floors.


Abrasive cleaning materials may scratch untreated limestone. Vinegar, lemon-based products and other acidic solutions may etch untreated limestone.

Things you need

  • Broom
  • Liquid dish soap
  • 2 cleaning buckets
  • Microfiber mop

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