Over time the vinyl will sink or be pressed down into the contour of these depressions telescoping the grout joints from the ceramic tile installation all the way up through the vinyl tiles.
Ceramic tile over pressboard and vinyl.
Next if the tile s joints are deep you ll want regrout them to bring them flush with the tile so that the lines won t telegraph show through the vinyl floor.
With vinyl tile the possibility of shifting is also present.
Loose lay perimeter bond sheet vinyl can shift beneath the tile installation making it unsuitable as a base for ceramic tile.
If the grout lines in the ceramic tile are deep you ll see and feel them under sheet flooring and if you choose to install preglued vinyl tiles they won t stick.
Over time the likelihood of problems arising from such installation are far higher than if you use a substrate such as concrete which is recommended.
Installing over wood.
Chipboard cushioned vinyl flooring particle boards of any type oriented strand board osb interior grade plywood tongue and groove planking and hardwood floors are unsuitable substrates for direct installation of ceramic tile.
Once the tile is leveled off your next step is to remove the toilet so that the floor can be laid under it not cut around it.
While standard sheet vinyl that is well bonded usually makes an acceptable base for ceramic tile that s not true of all forms of resilient flooring.