This sandstone flagstone floor measured around 15m2 and was installed in a house in the village of Boxford, Suffolk, you can see how dark the stone had become from the build-up of dirt and soil over time, clearly they were in need of a deep clean and seal.
We cleaned the floor using Tile Doctor Pro-Clean diluted with 10 parts warm water and worked in using a Black Scrubbing pad. This action certainly gave the floor a good clean but there were some staining that was proving stubborn to shift so we tried a stronger product called Remove and Go combined 50/50 with NanoTech UltraClean which add nano sized abrasive particles into the mix. We left the resulting formula to soak into the sandstone for about a while and then used a steam to penetrate deep into the pores of the stone and lift out the dirt, this did the trick and so we then removed the cleaning products with a wet vacuum and washed down the floor with clean water to neutralise the floor before sealing and left for the evening so the floor could dry overnight.
Sealing a Sandstone Tiled Floor
We came back the next day, the floor had dried overnight so we proceeded to seal the Sandstone with Tile Doctor Seal and Go which gives a nice low sheen finish; Sandstone is fairly porous so it took five coats of sealer in the end. Seal and Go is a topical sealer which works well on Sandstone to really bring out the veins and natural colour in the stone, it also leaves them a lot easier to clean as flagstones invariably have a rough riven surface.