Local floor tile installers do the following when installing slate tile: Remove the previous flooring, ensuring the tiling region is flat and clean. Apply mortar on the subfloor as an adhesive element. Employ spacers to create the requisite gaps between the pieces. Cut the edge tiles accordingly. Place the tile and push down each piece when it's in the correct spot. Clean off any adhesive mortar that leaked onto the tile pieces. Remove the spacers and wait for the adhesive to dry. Use a water sealant on the outer edges of all the connecting tile pieces before adding grout.