Could you provide some advice on what the proper prep process is for this? I am concerned that these tiles are heavier than the average tile. If it were a light tile, I could do it directly against the drywall, so what is the process for this heavier tile? Am I okay with just thinset (installation instructions seem to say so). The current wall is already finished, painted (latex) and textured, shuold I prep it in some way (sanding? dulling with water and TSP?)
The specs show about 12 lbs per sq foot for this tile. The walls are in good condition (~ 2005 construction).