cleaning flagstone

The new owners of this property in Kirkstall near Leeds discovered this 150 years old Flagstone floor under carpet shortly after moving in. Keen to have it restored as an original feature I was asked to quote for restoring it back to its original condition, or as close to that as possible given its age.

As you can see from the photos, the stone itself was very dirty and had lost all of its character. Other problems included the removal of the old glues used to secure the carpet, and the latex screed that had been used to level it and even some nails.

To restore the appearance of the floor I recommended milling the floor with a set of very coarse diamond pads that would remove a thin layer of stone off the top and reveal new stone underneath. I would use water to help lubricate the process and keep the dust down, but it would still be a messy a job, the advantage however would be the stone would be transformed by the process.

Although difficult to comprehend I was able to show them some examples of similar floors that had received this treatment. Happy with the potential outcome the quote was accepted, and a date set for the work to begin.

Cleaning a Flagstone Tiled Living Area

The first job was to remove as much of the adhesives and latex screed as possible from the floor. This was done using Tile Doctor Remove and Go to soften them before being scraped off manually and with the help of a coarse 50-grit diamond pad. The floor was then rinsed to remove the slurry that was generated and then extracted using a wet vacuum.

A set of milling pads were then attached to a weighted floor buffer and run over each slab several times to cut through the stone surface. Water was used to lubricate the process, however as mentioned earlier this process generates a lot of stone dust so a lot of rinsing and extracting needs to happen to remove it.

I used a lot of water during the milling and It’s important that the floor is dry before sealing so I left the floor for a few days before returning to apply the sealer.

Sealing a Flagstone Tiled Living Area

Old floors like this don’t have the benefit of a damp proof membrane so it is important to use a fully breathable sealer that will allow moisture to rise through the floor so it can evaporate at the surface. Failing to observe this can result in damp building up under the floor where it can reach out to the walls resulting in rising damp.

With this in mind I chose to seal the floor using two coats of Tile Doctor X-Tra Seal which is a fully breathable impregnator. It’s also oil-based so it adds structure and colour to the stone really bringing it to life.

The work not only restored the flagstones but completely transformed the floor, the flagstones now have an impressive depth of colour that was simply unimaginable at the start, needless to say my client was extremely happy.

For aftercare cleaning I recommended Tile Doctor Neutral Tile Cleaner which is a gentle but effective tile cleaner that won’t impact the longevity of the sealer.

Professional Restoration of a Flagstone Floor in North Yorkshire