Resurfacing 300 Year Old Sandstone Flagstones in Ramsbottom Lancashire

I was invited to this 300-year-old building in Ramsbottom, Lancashire to look at restoring a Sandstone Flagstone floor. Despite some minor repairs over the years, it was now in very poor condition and after renovating the property outside and in the owners felt it was now time to tackle the floor. Having done their research, they decided to call Tile Doctor in to do the renovation.

Having visited the property, I recommended milling the floor to remove years of wear and to reveal the new stone underneath. With old rough flagstones like this it is the only way to retain the character yet have a more serviceable floor that won’t shred mops.

Happy with my recommendation and quote I was given the go-ahead to do the work.

Cleaning a Sandstone Flagstone Tiled Kitchen

I started work by taking notes of moisture readings from various areas, these base reading will be used later to understand if the floor has dried sufficiently for sealing.

To mill the floor, I started with the application of a very coarse 50-Grit DRB pad which was fitted to a weighted buffing machine and run over each flagstone several times using only water for lubrication. Once that step was completed the floor was rinsed with more water and the slurry extracted using a wet vacuum. The coarse pad removes a very thin layer of stone off the top of the flagstone leaving it smooth.

The floor was then cleaned using Tile Doctor Remove and Go which was scrubbed in using a 240-grit carbide brush. Again, the floor was rinsed and the slurry extracted as before.

The 50-Grit pad is very coarse, so the next step was to refine the appearance of the stone using finer grit milling. Using the same process as before a 100-grit milling pad was applied to the stone with water, rinsed off and then the floor vacuumed. Then the process repeated with the 200-Grit milling pad.

The final step of the restoration was to give the floor an acid rinse using Tile Doctor Grout Clean-up worked in with a 200-grit soft pad. Again, the floor was rinsed and vacuumed afterwards.

With the sandstone flagstones now cleaned I turned my attention to the old pointing which was also in bad shape and crumbling in many areas. This was removed and re-pointed with a modern breathable pointing product.

The floor was left to dry out and I returned a few days later to seal the floor which will protect it going forward from staining and ingrained dirt etc.

Sealing a Sandstone Flagstone Tiled Kitchen

Before applying any sealer, I took several moisture readings for the floor and compared them with the base readings I had taken at the start of the job. There were a few areas of concern, but I was able to resolve this with floor fans until the readings were acceptable.

I was then able to proceed with the final step of sealing the floor for which I used Tile Doctor X-Tra Seal. This sealer is a fully breathable oil-based sealer which improves the appearance of the stone and being breathable will cope with any moisture rising through the floor. It’s very important to use a breathable sealer on an old floor as it won’t have the benefit of a damp proof membrane. The sealer was left to dry and then the process repeated with a second coat.

The Sandstone Flagstones were completely transformed by the process and my clients were over the moon with their new floor, they even left the following feedback:

Before leaving I took time to discuss aftercare which for Sandstone, I recommended the use of Tile Doctor Neutral Tile Cleaner which is pH neutral and ideal for cleaning sealed stone.

Source: Sandstone Flagstones Restored and Sealed in Ramsbottom Lancashire