What procedure to use to keep the tiles from falling from the ceiling before the mortar dries.
You should be using special tile adhesive made for tiling ceilings.
cut kickers, or braces, to hold them. i.e. 1x2 pine sticks are sufficient. cut to estimated lenght, usually 1/8 to 1/2 inch longer. counter tops, and solid step benchs help limit material used in this way. also once placed, kickers can be shared, by placing at edges of tile to hold two to four (corners) at once.
I would indeed tile the ceiling. Just be sure the bathroom is well vented with all the hot steam in the room. Just search for good easy cleaners. simple windex on the ceiling? not much soap up there?
The mortar that you are using really needs to be mixed so that is it very sticky and you can add a glue that is sold at any home depot or flooring store. ceilings suck as far as tiling them.
I was just thinking about this. Can you attach the tiles to backerboard or Durrock on the ground first and then glue the whole ceiling into place with 2x4 proping it up or leave a couple tiles out to also catch a few screws with the construction adhesive. later you can touch up around the edges and grout If NotHow about contact cement use alot of it though not a thin coat. OH and don't use mortar use construction adhesive it will actually stick and better then mastic. Mortar is for the floor
