This is a Semi Riven Black Slate floor which had been installed throughout much of the downstairs floor at a property in Bentham which is right on the Eastern edge of Lancashire. The Black slate and Grout had seen some wear and was now more Grey than black and having recently installed a new Kitchen the owner wanted the floor to look its best.

Rough stone can be especially hard to maintain if the wrong sealer has been applied. With rough or textured stone, it’s always best to use an Acrylic Sealer (aka ” Topical sealer”) where possible. Unlike a Matt finish impregnating sealer a Topical Sealer is designed to sit on the surface of the Stone preventing dirt from getting caught in the nooks and crevices making it much easier to clean.

After surveying the floor, I recommend burnishing the stone with a coarse pad to deep clean the stone and remove any remaining sealer, then seal with Tile Doctor Seal and Go which is a Topical sealer which we find always has provides good results on this type of floors. Happy with the price and keen to get the floor renovated we were given the go ahead and scheduled a date to return to do the work.

Deep Cleaning a Semi Riven Black Slate floor in Bentham

The last thing we want to do is cause any damage to their beautiful new wooden kitchen. So before starting the cleaning process I applied clear silicone to the base of the new Kitchen units, this prevents water from the cleaning process seeping into the woodwork through capillary action.

To get the tiles clean we burnished the stone floor with a coarse 200-grit Diamond pad fitted to a buffing machine running at slow speed and using water for lubrication. This gives a really deep clean and was followed up with the application of a black scrubbing pad to remove any excess resin released from the Slate which is quite common with Black stones due to the oil content. Once the Slate was clean, we turned our attention to the grout which was scrubbed with Tile Doctor Pro-clean. The floor was then rinsed with water and the soil extracted with a wet vacuum, once done the floor was left dry out.

Whilst at the property we managed to resolve a problem with a poorly laid slate tile in the hallway which the customer had often tripped over, so much so they had covered it with a rug, which was fine, but you couldn’t see the Slate. Rather than lift and relay the tile I managed to cut back the surface of the stone with a hand held flex machine using several different diamond grits. You can see from the pictures how this looks before, during and after the seal. A further advantage of treating the stone in this way is that the slate takes on a more polished finish as the rough texture is cut back. The results speak for themselves and the customer certainly won’t be tripping over the tile from now. With no further need for the rug they can get the full benefit of the slate floor.

Sealing a Riven Black Slate Tiled Floor

The floor was left to dry off overnight and we returned the following day to apply a sealer first checking the floor was dry using a moisture meter. All was well, so we started to apply the first of several coats of Tile Doctor Seal and Go. It was a large area across multiple rooms, so it took some time before the job was complete.

The sealer added a lovely subtle sheen to the floor and restored the black colour in the Slate, the grout was also much cleaner and floor look transformed from the grey dull appearance we first experienced. As usual before leaving we talked about aftercare, using warm water (not hot or cold) with a mop and bucket and half a cap of Tile Doctor concentrated Neutral Tile Cleaner. Using the correct cleaning product will ensure they get maximum life out of the sealer.

Source: Black Slate Cleaning, Renovation and Sealing Service in Bentham, Lancashire