Putting the Shine Back on Water Damaged Limestone Tiles

This 50 m2 Limestone tiled floor at an old thatched cottage in Slough had unfortunately been stained following a radiator system leak which covered the tiles in dirty radiator water and sludge. The limestone tiles had been laid on a floor without a screed damp proofing membrane which resulted in the release of efflorescent mineral salts rising up through the stone from the soil beneath. This left a constant layer of reforming fine salt on the surface of the stone which looked like fine dust. The water had also damaged the surface of the stone leaving patches of dull etched stone next to clean polished areas.

Waterleak Stains on Limestone Tiles Slough Before Cleaning Waterleak Stains on Limestone Tiles Slough Before Cleaning

Stripping the Limestone Tiled Floor

To encourage the stone to dry out thoroughly we left a number of dehumidifiers in the room for a week and increased the room temperature. Once the stone was dry, it stopped releasing effloresce salts and we were able to restore the surface polish by burnishing the floor.

Waterleak Stains on Limestone Tiles Slough During Cleaning
Burnishing involves stripping back the Limestone surface using a set of burnishing pads, these diamond encrusted pads come in a number of grades and each one does a different job. I started with the coarse pad together with water removed the slurry with a wet vacuum, rinsed the floor and then carried on with the medium, fine and super fine pads using the same processes until the surface was polished again. Finally when I had dried the floor I used a green buffing pad to buff the floor up.

Sealing the Limestone Floor

The next step was to seal the Limestone with a couple of coats of Tile Doctor Colour Grow which will provide a durable protective sealer against future staining. The result was an even, polished limestone tiled floor with a durable sealing to protect against future soiling and staining.

Waterleak Stains on Limestone Tiles Slough After Cleaning Waterleak Stains on Limestone Tiles Slough After Cleaning

Source: Residential and Commercial Tile Cleaning Services in Berkshire