(Also see Substrates)
In order to tile over existing porcelain tile, the tile should be cleaned. New ceramic or porcelain tile can then be installed using MAPEI Large-Format Floor & Wall Tile Mortar, MAPEI Large Tile & Stone Mortar or 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.