I made a tile mural at my school. All professional tiles have a rough back
(actually they have grooves which are supposed to help them adhere better),
so yes, have them texture the back. I attached my tiles to the wall with
tile glue - I don't know what it was called, but it is specially made for
adhereing tile. My tile was attached to a slick brick wall several years
ago - it is in the commons and high school kids lean on it daily and no
tiles have fallen off, so I must have done something right! *L* The most
important piece of advice is to 1)use quality products for hanging the
tiles, 2)use a level if your tiles are to be in a straight row, 3)make plans
for the edges cause otherwise it will look odd, and 4)make sure nobody is
around when you start so you can look silly without an audience! *L* Oh, and
start in the middle of your mural.
> I am making a mosaic tile mural, with each student making a 2" textured
> tile. I plan to glue them to a board and then grout, but I really don't
> think Elmer's is the type of glue I should be using. I'm thinking
> something like epoxy or Liquid Nails would be better.
> If anyone has done something like this before, your suggestions and
> guidance would be great. Also, should I have the kids texture the back
> of these for better adhesion?