Removing Acid Damage from Black Limestone with Diamond Pads in Cardiff
This customer from Cardiff was in despair after a builder ruined her expensive Black Limestone Patio after using brick acid to clean it up. She contacted Tile Doctor in the hope that it could be saved and being their local agent, I was asked to contact her.
I visited the property to assess the damage to the patio and it was immediately clear to me what needed to be done as this is not the first time I had come across this problem. It turns out the builder was attempting to remove cement splatters from the stone after applying render to the back of the property. Limestone is a sedimentary stone composed primarily of calcium carbonate which can be dissolved in acid, so using acid on Limestone is never a good idea.
Cleaning a Limestone Tiled Patio Floor
I spent the first day removing the damage to the stone by burnishing the patio with a weighted buffer machine fitted with a 100-grit diamond pad lubricated with water and using a wet vacuum to remove the soiling it generates.
This was followed by a 200-grit, 400-grit and then finished with an 800-grit diamond pad until I had removed all the damage and resurfaced the Limestone. Again, water was used to lubricate the process and the floor was rinsed with fresh water after each pad and the soil extracted with a wet vacuum.
This work was done in August 2022 and I had purposely chosen a patch of good weather to do this work and was able to leave the patio to dry off overnight after another thorough round of rinsing with water and extracting.
Sealing a Limestone Tiled Patio Floor
I returned the next day to finish the renovation, first checking first that the stone was dry with the use of a damp meter. The readings were good, so I went ahead and applied the sealer. Secondly its recommended for outdoor use and is UV safe so should last a long time ensuring the patio will now be able to withstand the outside weather and the stone will be protected from the elements.
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The results were amazing, and my customer was relieved and delighted with the finished result allowing her to look forward to several summer garden parties that were planned.
