Black Limestone Patio Ruined by Brick Acid Restored in Berkshire

Black Limestone has become very popular in recent years, unfortunately however we find installers ruin its appearance with the use of unsuitable cleaning products. This was the case with this relatively new property in Highclere Village near Newbury in Berkshire.

Black Limestone had been installed throughout the exterior by a landscaping company, but the owner wasn’t satisfied with they had left the stone. It turns out they used brick acid to wash away the remaining residue that had been left from a messy installation. Limestone is acid sensitive, and this resulted in the stone being stripped of its natural oils that give it the rich black colour. The stone now looked very grey, bland and was extremely porous. It certainly wasn’t how the client expected the patio to look.

Black Limestone Paved Steps Before Renovation Highclere Village

I visited the house and conducted a test in a small inconspicuous area. Luckily the Limestone hadn’t been sealed which was fortunate as stripping back exterior stone sealers can be a very time-consuming process. After the demo was completed the client was very satisfied and a provisional date was booked in. The client was eager to have the Black Limestone patio looking lovely ready for the summer weather, but we would need a dry day to be able to complete the work.

Black Limestone Paving Before Renovation Highclere Village

Highclere is a village situated in the North Wessex Downs, an area of natural outstanding beauty. It is also home to Highclere Castle, which has been used in many films and TV series, including Downton Abbey.

Renovating Black Limestone Patio Tiles

The first job was to remove all the surface dirt that had built up on the surface of the stone since it had been laid. I did this using a cleaning and extraction system that’s run from my vehicle. It’s a high-pressure cleaner with long hoses that can clean and extract dirt keeping things as mess free as possible. Once the area was cleaned the stone was left to bake and dry out in the hot sun.

Later that afternoon I conducted several moisture tests with a damp meter. The readings were good so I was happy the stone was dry, and I could move onto the next stage of re-oiling the stone. I used Tile Doctor Stone Oil for this purpose, it’s a conditioning product that penetrates the stone and revives the colour. Two coats were applied throughout and any excess oil that hadn’t penetrated the stone was buffed off. The oil was then left to cure overnight.

Sealing a Black Limestone Patio

I returned the next day and was very pleased how the Limestone looked, the rich colour was now showing. The oil had cured, and the stone was ready to seal. Two coats of Tile Doctor Ultra-Seal were applied to seal the stone. Rated for external use Ultra-Seal works by occupying the pores in the stone thereby preventing dirt from become ingrained there. This product doesn’t change the appearance of the stone, resulting in a completely natural look.

Black Limestone Paving After Renovation Highclere Village

My client was over the moon with how her Black Limestone now looked and left the following feedback: “Dennis oiled and sealed our newly laid black limestone paving. He transformed it from grey and stained looking into a beautiful black even colour. He takes great pride in his work and I would recommend him highly.”

Black Limestone Paved Steps After Renovation Highclere Village

 

Source: Black Limestone Patio Restoration Service in Highclere, Berkshire

Black Limestone Patio Ruined by Brick Acid Restored in Bromsgrove

A local company in Bromsgrove were commissioned to lay a stunning and expensive Black Limestone patio for a customer who was renovating their property. Unfortunately, the company tried to clean the finished patio with brick acid, and because limestone is generally very porous and acid sensitive this discoloured the tiles to a rather unsightly, dull grey – a far cry from what their customer was expecting!

Acid Damaged Black Limestone Patio Before Restoration Bromsgrove

The company facing a large bill contacted Tile Doctor for expert advice to see if the beautiful tiles could be restored. If Tile Doctor couldn’t come to the rescue, then the company would have no choice other than to replace them at their own expense.

Acid Damaged Black Limestone Patio Before Restoration Bromsgrove Acid Damaged Black Limestone Patio Before Restoration Bromsgrove

Black limestone paving has become incredibly popular over the last few years as its dark tones suit the current trend for a monochrome palette. It is also hard wearing and readily available.

Tile Doctor specialise in the restoration of all types of tile and stone and as their local agent, I was asked to go over and see what could be done. I realised that the brick acid will have damaged the surface of the stone so to restore it I first tried applying a coarse 200 grit diamond burnishing pad. The pad successfully demonstrated that the appearance could be restored and impressed with the difference the site foreman booked me in to complete the whole patio. Luckily the weather forecast was set fair for a few days, which would be needed to clean and seal the patio.

Restoring an Acid Damaged Limestone Patio

Made with industrial diamonds and available in different sizes and grits, burnishing pads are ideal for restoring the appearance of polished stone floors. The first step was to work on the tiles with a course 200 grit diamond pad fitted to a weighted rotary machine and lubricated with water. This took off a layer of the limestone, bringing back the original black appearance of the tiles.

Acid Damaged Black Limestone Patio During Diamond Pad Polishing Bromsgrove Acid Damaged Black Limestone Patio During Cleaning With CRB Machine Bromsgrove

Next the patio was worked on with 400 grit diamond pads followed by 800 grit pads – the first stage of polishing – and each application was cleaned off with water. Because the property was being renovated there was a lot of dirt on the tiles and grout from construction, so I scrubbed in medium dilution of Tile Doctor Pro-Clean using a CRB (counter rotating brush) machine. Once done I rinsed down the area with more water and left it to dry. As you can see from the pictures it was a large area, so this work took two days to complete.

Acid Damaged Black Limestone Patio During Cleaning Bromsgrove

Sealing Limestone Patio Tiles to Restore Colour

I returned the next day to start the sealing process beginning with the application of Tile Doctor Stone-Oil which restores the deep black colour and texture to the limestone, it’s also an impregnating sealer that adds protection and improves mechanical strength once cured.

I allowed this to dry for 24 hours and then applied a coat of Ultra-Seal, a no-sheen natural-looking sealer formulated to provide maximum stain protection.

Acid Damaged Black Limestone Patio After Sealing Bromsgrove

The customer was very happy with the results. The patio tiles were fully restored to their original glory and their customer was delighted. More importantly, the company had been saved from making an insurance claim. They left the following feedback on completion:

“Great job by Kieron after the wrong cleaning solution was used on a patio we installed. Came up better than new!”

Acid Damaged Black Limestone Patio After Restoration Bromsgrove Acid Damaged Black Limestone Patio After Restoration Bromsgrove

 
 
Source: Limestone Tile Cleaning and Sealing Service in Birmingham