Acid-Damaged Limestone Tiles Restored to New in Wapping

All carbonate materials, including those used in building and construction, are sensitive to acid deposition. A common example of this is the reaction that occurs when you combine bicarbonate of soda and vinegar. Another example of a material affected by this is Limestone, which is often used as tiled flooring. When exposed to acidic products, the damage caused to Limestone tiles is both material and aesthetic, and many property owners who suffer this kind of damage assume that they are beyond repair.

I was recently called to a property in Wapping, Central London, to take a look at a damaged Limestone tiled floor situated in a wet room. The surface of the stone had suffered heavily from corrosion due to the spillage of an acidic solution and the property owner was keen to see what could be done to restore the condition of the tiles. He had been told by another company that the floor was beyond repair, but I knew that with the right products and techniques that I could provide a full restoration.

Limestone Floor Damaged by Acid Before Restoration Wapping

Cleaning and Burnishing Acid-Damaged Limestone

My first attempt at reducing the acid stain was to apply Tile Doctor Reduxa, which is formulated to remove or significantly lighten stains caused by acidic beverages such as cola and white wine, as well as acid-based household cleaners.

I followed this by rinsing the tiles with water rinse and applying Tile Doctor Pro Clean solution, a high alkaline product that would neutralise the acid and stop it from causing any further damage. After leaving the Pro Clean to dwell on the Limestone for ten minutes, I used a handheld rotary buffer fitted with a small black scrubbing pad to remove any dirt, soap scum, and excess old sealer from the tiles and grout lines. Next, the floor was carefully rinsed with water to make sure no chemical residue remained from the cleaning products.

Although the situation was significantly improved, the stain remained visible, so the next step was to re-surface the tile using a set of diamond encrusted burnishing pads of different grades. I started with a Coarse grit diamond encrusted pad to grind away the damage layer of stone, and followed this by applying Medium, Fine and Very Fine pads to slowly hone and polish the floor, back to its original condition.

Sealing Limestone Tiles

I left the tiles to dry completely overnight before returning to the property the next day. With the acid stain removed, it was time to re-seal the floor using Tile Doctor Colour Grow, a colour- enhancing, impregnating sealer that is particularly effective at boosting the appearance of Limestone.

Limestone Floor Damaged by Acid After Restoration Wapping

The result was very satisfying for both myself and the customer. In fact, the customer even when so far as to leave the following feedback on the Tile Doctor Feedback System.

“Didi is indeed very knowledgeable and professional. I was more than a little worried by Limestone corrosion due to accidental spillage of a corrosive substance in our wet room. Didi came to sort it out for us and what to the layman looked like a catastrophe and possible new tiling operation was expertly repaired by Didi and his team. Our wet room now looks like new, much better than before in fact, and we are very grateful to Didi and also Tile Doctor for being able to head straight for the problem and sort it out so efficiently. Highly recommended!”
 
 

Professional Acid-Damaged Limestone Tiled Floor Restoration in London

Slate Tiled Wet Room floor in Ealing

This was a slate floor in a wet room in a house in Ealing W5. The black semi-riven slate had originally been sealed by the tiler on installation but had never looked how the customer wanted it to.

Cleaning Semi-Riven Slate Tiles

To strip off what was left of the old sealer we used Tile Doctor Remove and Go leaving it to soak into the floor for a while before working it in with a rotary machine fitted with a black buffing pad. The solution was then removed using a wet and dry Vacuum and the floor washed down with clean water. This work removed any remaining sealer but we still needed to give the floor a deep clean and so the whole process was repeated this time using Tile Doctor Pro-Clean which is an effective heavy duty alkaline cleaning product ideal for cleaning up natural stone floors and grout. After we gave the floor a thorough rinse to remove any cleaning products and neutralise the floor ready for sealing, last step was to remove the water from the floor using the wet vacuum again and leave it to dry out overnight.

Semi Riven Slate Floor Before

Sealing Semi-Riven Slate Tiles

The next way came back and sealed the floor using two coats of Tile Doctor Colour Grow as you can see from the photographs did an excellent job lifting the colour out of the tile.

Semi Riven Slate Floor After
The customer was very pleased to have a well-sealed black slate with a slight sheen instead of the dull-looking grey floor she had had before.

Semi Riven Slate Tiled Bathroom floor Cleaned and Sealed in London