What you should do is glue and screw insulation boards down , lay electric matting , pour self leveler on top, then tile when slc has set .
Id find the center on the bifolds and work your setting out from there, either grout joint in center of glass or full tile spanning the middle door.
Measure your cut to the long wall, cut them all and work from that wall.
Id get standard set adhesive as well
Id find the center on the bifolds and work your setting out from there, either grout joint in center of glass or full tile spanning the middle door.
Measure your cut to the long wall, cut them all and work from that wall.
Id get standard set adhesive as well