The problem is the size and weight of the tiles first is the tiles porcelain if so they should not have been fixed to plaster walls and you should of use powdered adhesive ready mixed is only good for ceramic tiles up to 300 x 300 the walls should be clad with tile backer board including the smooth finished wall and any priming should be done with sbr diluted.
Tiles not sticking to wall.
Many people think that with peel and stick tile you should not have to use adhesive at all.
Cleaning your trowel frequently by washing it off with water will make it easier to work.
After 2 days can easily be lifted off by hand with no adhesive left on the wall.
The wall has not been sized.
Could be as simple as not using the correct size trowel the back of the tile has to be covered 90 percent with thinset.
Be sure to spray the wall surface with water to activate the glue.
To fix a tile that pops up later reactivate the adhesive by heating it up with an iron.
Use gorilla glue to replace each one.
Keep a damp rag handy so you can keep your hands clean.
Tiles arrive in five days and shipping is always free.
Then prep the wall and use the adhesive made specifically for the tile you have.
Sometimes self stick vinyl tiles won t stick only after the fact.
Fixing a tile that pops up later if the corners peel up heat the tile to reactivate the adhesive then place a stack of heavy books on it to weigh the corner back down.
Tile won t stick to thinset.
Mixtiles are beautiful 8 x8 photo tiles that stick and restick to your walls without nails or any damage.
Or take them all down putting wax paper between each tile so they don t get damaged.
Just lay it lift it back up and check for coverage.
The adhesive sticks well to the tiles but our problem is very poor adhesion to wall.
It is a good idea to clean them the night before you plan to do the tile.
Mixtiles are beautiful and attach easily.