Roughen the tile with 80 grit sandpaper.
Adding tile to existing tile.
Tile loads are usually higher than 10 psf so chances are your trusses were not designed to account for this.
Tap the on the top left corner of your screen.
Your shower tile is surface mount so you can simply remove the trim piece at the point you want to start the subway tile and butt it into the existing square tiles.
Grind them down with a grinder.
Open the tile app on your smartphone or tablet.
On the add a device page choose tile for tile partner products follow the prompts on your device press the button on your tile device and listen for the tune.
Scrub the wall tiles with diluted degreasing cleaner and a nylon scrub brush.
If so check out the classes at home depot lowes might also have them for tile installation.
Then rinse the wall with a water dampened.
Out of all the tiles my client had collected this one was the clear winner for these reasons.
It was relatively solid looking.
It did not look like we had tried to match the existing tile and failed.
Sounds like this is a new adventure for you.
It was 13 x 13 the exact same size as the old tile.
Lay a level on the old tile and mark any high spots.
By adding cement board and tile to the floor you will be increasing the top chord dead load.
A couple other considerations are the on center o c spacing of the trusses.
Hold the tile close to your device until they connect it should take about ten seconds.
Mix degreasing cleaner with water in a bucket using a dilution recommended by the cleaner manufacturer.