Black Limestone Patio Archives - West Surrey Tile Doctor

Black Limestone Patio Damaged with Brick Acid Rescued in Guildford

This client from Guildford had the front of her house painted by a contractor who managed to splash paint on their black limestone patio. To remove the staining the contractor decided it would be a good idea to rinse the patio with brick acid. It certainly got the paint off but also bleached the colour out of the limestone and etched the surface in the process completely ruining its appearance. Unfortunately, some types of stone can be cleaned with acid however other calcium-based stones are very sensitive to acid and therefore easily damaged.

Acid Damaged Limestone Patio Before Renovation in Guildford

Horrified by the state of their patio they decided to contact Tile Doctor and I was able to reassure them that there was no need to worry and that I would be able to renovate the limestone and restore the colour. I worked out a detailed quote for the work, the will bill for which no doubt would be passed onto the decorator and arranged a time for the work to be carried out.

Renovating a Black Limestone Tiled Patio

To rectify the surface etching the best solution is to burnish the limestone tiles with coarse 100 and then 200 grit diamond pads. These coarse pads cut slightly into the stone to remove the damage. The pads are fitted to a weighted floor buffer and run over each pad several times. The extra weight added to the buffer improves traction with the stone and gives an even result. The process generates a fine slurry which is rinsed with warm water and then extracted with a wet vacuum.

Acid Damaged Limestone Patio During Renovation in Guildford

Normally I would leave the patio to dry off naturally, but the weather was beginning to change, and I was concerned it could rain so the patio was speed dried using an air mover. After an hour I checked the moisture readings had dropped within the correct tolerance and the tiles were ready to be sealed.

Sealing a Limestone Tiled Patio

I chose Tile Doctor X-Tra Seal to seal this stone, applying two coats. This is an oil-based product that restores the beautiful black colour to the limestone resulting in a nice finish and made my client happy who wanted the tiled darkened. This product is also rated for external as well as internal use so it is ideal for this application.

Acid Damaged Limestone Patio After Renovation in Guildford

Once complete the Black Limestone looked fantastic much to the relief of the owner; the dark colour had returned and the features in the Limestone were visible. Before leaving I recommended the use of Tile Doctor Neutral Tile Cleaner for regular maintenance going forward. It’s always tempting to use something more aggressive on external stone but doing so will risk the problem repeating.

Professional Restoration of a Limestone Tiled Patio in West Surrey

Black Limestone Patio Before After Renovation Farnham

Cleaning and Sealing a Limestone Patio in Farnham

This customer from Farnham called me with three requests. First, can you clean and seal our Black Limestone patio? Secondly can you remove some scratches? and finally, can you make it less slippery as my children have slipped a couple of times in the wet.

After discussing the problems over the phone, we agreed a convenient date and I went along to the property to have a look. I could certainly do the first and second but not the third. There are products on the market but most Anti-slip products I’ve come across contain acids which etch and roughen the surface. Her patio was made of dark limestone which is acid sensitive and applying an acidic product would ruin the look of the stone leaving it looking washed out. I discussed with her the options and the process and we agreed a price, booking the work in for later in the month.

Cleaning a Black Limestone Tiled Patio Floor

First, I cleaned the grout lines with Tile Doctor Pro Clean which was left to soak in for about ten minutes before being scrubbed with a nylon brush and being careful not to further scratch the stone.

The next step was to clean the stone with a series of burnishing pads starting with a coarse 400-grit lubricated with water then moving onto increasingly finer pads of 800 and 1500 grit. It’s important to rinse and extract the slurry after applying each pad. This process removes the existing sealer and slightly mills the tiles firstly opening the pores then slowly closing them as the process continues. I avoided the dark area in the picture where the table was situated as it had been protected from the weather, sun and small children. My aim was to get the same consistent colour across the whole patio.

Once I had used the three pads, I completed a final rinse and extraction with a wet vacuum. I then checked surveyed the floor looking for any areas that needed more work and to verify that the scratched had been removed as part of the process. The work went well, and I was happy to see that the scratches had been lifted and the appearance of the stone looked much better and more even.

Sealing a Black Limestone Tiled Patio Floor

It was a warm day, so it wasn’t long before the stone had dried and were dry enough to be sealed. I talked through the customers options for sealing and recommended the application of Tile Doctor Colour Grow as it contains a colour enhancer which would return the dark colour to the stone and match the original colour under the table. Colour Grow is also rated for external use.

Two coats of Colour Grow were applied, and this made a big improvement to the appearance of the stone resulting in a stunning transformation. The customer was over the moon and with the patio now ready for the summer she could not wait to get the patio furniture in place and enjoy the space.

Professional Renovation of a Black Limestone Patio in West Surrey

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