I was contacted by the owner of the property near Olney, on the border of Northamptonshire, who was renting the house out whilst he worked abroad. The flagstone floors on the ground floor were grubby and the tenants were struggling to keep them clean. I guess being a rental property the tenants didn’t want to be blamed for the condition of the floors when they eventually left.

I was asked to pop round to the property, meet the tenants, inspect the floors, and come up with a plan to resolve the issues. It was clear to me that the flags had not been sealed when laid and as a result dirt had become trapped in the pores of the stone making it difficult to shift. With the owner abroad all correspondence was done over the internet and so I sent over an email to explain the problem and included a quote to resolve the issues. Happy to have the problem resolved and with quote I got the go-ahead.


Deep Cleaning Sandstone Kitchen Flagstones

The work was carried out over two days with day one for cleaning and the second for sealing. Cleaning started by spraying the flagstones using a 3:1 dilution of Tile Doctor Pro-Clean using a pump-up sprayer. This was left to soak in for ten minutes and then agitated using a rotary machine fitted with a black scrubbing pad. This process generates a lot of soiling as the dirt is released from the pores of the stone which is rinsed off the floor and extracted with a wet vacuum.

Flagstone Floor During Renovation Olney Flagstone Floor During Renovation Olney

The next process was to give the grout a good scrub using 10:1 dilution of Tile Doctor Grout Clean-up. This was applied to the grout lines throughout and scrubbed in by hand using stiff grout brushes to remove any stubborn stains. The entire area was then rinsed using water and extracted with the wet vacuum as before. The vacuum was used to remove as much moisture from the floor as possible and then they were left to dry off overnight. I also make use of an industrial air mover to speed up drying times as I work.

Flagstone Floor During Renovation Olney Flagstone Floor During Renovation Olney

Sealing Sandstone Flagstones

I returned the following day to seal the flagstones but before starting I checked the moisture levels in the flagstones with a damp meter. The readings were fine so I proceeded to apply the first of three coats of Tile Doctor Colour Grow sealer, allowing each coat to fully dry before applying the next.


As well as providing protection from dirt and stains this product enhances the natural colour in stone and being an impregnator that soaks into the pores will work well in a demanding kitchen environment. Additionally, Colour Grow is fully breathable which is an important feature when sealing tiles in an older period property like this one which will have been built without the benefit of a damp proof membrane.


I sent before and after photographs to the landlord as he was abroad, he was very pleased with the job and told me the tenants had contacted him to tell him how happy they were with the process and the finished result and even left the following feedback on my web site.

I’ve had a large number of tradespeople work on my house in the last few years and Phil is up there with the best of them. Many trades don’t do comms well, but Phil does: he’s easy to reach, easy to communicate with and quickly understood what needed doing – and just did it, exactly how we wanted and to a very high standard. Highly recommended.



Source: Flagstone Floor Cleaning and Sealing Service in Olney