Im working with very expensive 12x24 glass tile the problem im having is with making holes in the glass with my hole bit, everything cuts fine until i install the tile on the wall after about 1 to 4 hours the tile shatters im using white thinset the kind people at olympia say that its the suited cement for glass tile is there something im missing here.

Ok, tell us what kind you're using. What you are applying to and with what trowel?

Jaz

flextile 51 thinset, cement board,1\4 x 3\8 trowel im cutting tile with 1 1\2 dimond bit lots of water

Sure sounds like the thinset is shrinking as it dries and is breaking the glass. I checked the flextile web-site, and not a word about glass tiles. But perhaps one of Flextile thinsets are indeed ok for glass? Maybe they've sold it for glass before, but not any as large as yours?

Most other manufacturers recommend their premium latex or polymer modified mortars for glass. You should call FlexTile's Tech Department for help.

Jaz

#51 is pretty good stuff, it has lots of polymer/latex in it. Are any of tile that aren't drilled or cut in some way cracking? Have you tried drilling a hole in a tile and not installing it, to see if it cracks?

I've heard that Flextile 44 Additive (high solids) combined with Flextile 51, 53, or 54 mortars should be used to bond large format glass tiles.