C.T. Williams Tile Company adheres to the methods of the Tile Council of America (T C A )Handbook for Tile Installations section; American National Standards Institute(ANSI) A108.1B or A108.1C Contractors Option: Installation of Ceramic Tile in the wet-set method with Portland Cement Mortar or installation of ceramic tile on a Cured Portland Cement Mortar Setting Bed with Dryset or Latex-Portland Cement Mortar.