(Also see Substrates)
In order to tile over existing natural stone tile, the tile should be sanded and then cleaned in order to completely remove any sealers. Ceramic, porcelain tile or natural stone, can then be installed using a two-part mortar such as MAPEI Uncoupling Membrane Mortar mixed with MAPEI Polymer Additive.
Natural stone tile up to 15″ in length and width can be installed using a two-part mortar such as MAPEI Mosaic & Glass Tile Mortar mixed with MAPEI Polymer Additive.