Black Limestone Floor Ruined by Descaling Solution in Stratford upon Avon

I really felt for this customer who was mortified after accidentally spilling limescale descaling solution on their beautiful Black Limestone floor in Stratford upon Avon. The problem started when attempting to descale a coffee making machine in the kitchen, unfortunately the bottle fell out of his hands and onto the Black Limestone floor, the subsequent attempt to mop it up spread the problem across the floor.

Acid Damaged Limestone Kitchen Floor Tile Before Restoration Stratford Upon Avon Acid Damaged Limestone Kitchen Floor Tile Before Restoration Stratford Upon Avon

Descaling solutions contain strong acids that dissolve the minerals in limescale so they can be easily removed. Limestone being of a similar structure is equally effected however in this case the product was removed quickly and didn’t have time to etch the stone. Unfortunately, the descaler did have time to upset the factory polish leaving a right mess and ruining the appearance of the stone.

I went over to survey the floor and reassured my customer the floor could be restored. There are several products and methods that can be applied to resurface and polish stone floors, so I knew the problem was repairable, it was just a question of finding the best solution for the customer.

Stripping Sealer from Black Limestone Flooring

I reasoned that the underlying stone was not etched by the acid, it was the wax-based factory finish that had been upset so the best course of action would be to strip back the entire floor to the bare stone and then reapply a new sealer that would provide a similar appearance.

To do this I started with the application of Tile Doctor Remove and Go across the whole floor. This product is a coatings remover that is specially designed for use on Tile and Stone, it was sprayed onto the floor and after ten minutes scrubbed in using a rotary machine fitted with a scrubbing pad. The resultant slurry was then rinsed off with water and extracted using a wet vacuum. This process was repeated until I was confident that the factory polish had been removed.

Next step was to strip the stone of the black dry added by the factory by giving it an acid wash using Tile Doctor Acid Gel. This was necessary to rebalance the appearance of the stone across the entire floor and would result in a consistent appearance one resealed. The Acid Gel was scrubbed into the Limestone, then rinsed off and extracted using the same procedure as before.

After a final rinse the floor was left to dry off overnight.

Sealing Black Limestone Floor Tiles

The next day I first checked the floor was dry using a damp meter, there were no excess moisture issues so I able to go ahead and seal the stone using a product that would bring back the colour and add protection against dirt and staining.

The best product for this was Tile Doctor Colour Grow which is an impregnating sealer that seeps into the pores of the stone protecting it from within and enhancing natural colour at the same time. The only disadvantage of this product is it leaves a matt finish whereas my customer wanted the shiny, easy to clean appearance of the original tile. To resolve I recommended we leave the floor to settle for a while and if no issues develop, I would add a couple of coats of Tile Doctor Seal and Go which is compatible with Colour Grow and would give the desired finish.

Acid Damaged Limestone Kitchen Floor Tile After Restoration Stratford Upon Avon Acid Damaged Limestone Kitchen Floor Tile After Restoration Stratford Upon Avon

Due to various commitments on both our parts it was six weeks until I was able to return and top up the sealer with Seal and Go. It was worth waiting for and much to the relief of the owner his Black Limestone floor has been transformed to new again.

Acid Damaged Limestone Kitchen Floor Tile After Restoration Stratford Upon Avon

 

Limestone Kitchen Floor Tiles Restored in Stratford upon Avon

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Old Yorkshire Flagstone Floor Covered in Bitumen Renovated in Sedgefield


This property in Sedgefield, County Durham, recently came under new ownership and the new owner planned several renovations including replacing the carpet in the front room. Removing the carpet was straightforward but unfortunately it had been glued down using a good layer of bitumen which left quite a mess and upon further inspection she realised there was a perfectly sound Yorkshire flagstone floor underneath.

Realising the flagstones would make an impressive floor she was keen to have them restored and spoke to a number of people including a builder who all said it would be an impossible job. Bitumen is an awful material and it was clear removing it from the stone would not be easy.

Yorkshire Flagstone Floor Covered in Bitumen Before Renovation Yorkshire Flagstone Floor Covered in Bitumen Before Renovation

Having exhausted local connections, she turned to the internet and came across details of a Victorian floor stained with Bitumen that a colleague of mine had worked on and so gave Tile Doctor a call.

Cleaning Bitumen off Yorkshire Flagstones

With a floor like this you can’t really make too many promises as to the outcome or how long it will take however we do access to a lot of experience and some very powerful cleaning products so I was confident we could improve the look of the floor significantly.

To start we carefully scrapped off as much of the black bitumen as possible which took a lot longer than I had initially thought. Next I created a strong mixture of two Tile Doctor Products Acid Gel and Nanotech HBU Remover applying it in sections to the floor like a poultice and leaving it to soak in for a while before agitating it with a rotary scrubber. Acid Gel is used to remove minerals such as salt deposits, cement and grout smears and in this case, I felt it would also help to weaken the Bitumen. Nantotech HBU is another strong product which is named after the tiny Nano sized particles it contains and HBU is an acronym for Heavy Build-Up.

Yorkshire Flagstone Floor Covered in Bitumen During Renovation Yorkshire Flagstone Floor Covered in Bitumen During Renovation

After being worked into floor it was rinsed off with water to neutralise the acid and the resultant slurry extracted using a wet vacuum. Once a section was clear we moved onto the next and repeated the process, we also spot treated any ugly spots that needed further treatment. It took about a week to complete the cleaning but using this process I’m happy to report we were able to remove about 99% of the Bitumen and the Flagstone floor was now fully visible.

Yorkshire Flagstone Floor Covered in Bitumen During Renovation

Sealing Yorkshire Stone

The floor was left to dry overnight and I returned the next day to seal the floor first checking it for dampness using a Damp Meter. The flagstones were dry so I then proceeded to seal the floor using a couple of coats of Tile Doctor Colour Grow which is a matt sealer that impregnates the pores of the stone protecting it from within whilst enhancing the natural colours of the stone.

Yorkshire Flagstone Floor Covered in Bitumen During Sealing

The owner was very pleased with the difference we had made and whilst the Yorkshire stone had been darkened by the Bitumen in places it has defiantly added a lot of character to the floor and blends in well with the rustic wood burner in the hearth.

Yorkshire Flagstone Floor Covered in Bitumen After Renovation Yorkshire Flagstone Floor Covered in Bitumen After Renovation

 
 

Restoring the Appearance of Yorkshire Flagstones in County Durham



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