Replacing plastic tiles

I bought this house in Iowa in Dec 2017 and all around the walls are these Plastic tiles that are popping off due to the mastic not holding them anymore, I want to take them down clean the wall and put them back minus the tub surround I will use a prefab wall so that being said can I install them like normal tiles with the gap for grout?
q reusing plastic tiles
q reusing plastic tiles
  4 answers