-linux_lad wrote:
I'm planning to remodel my kitchen. I plan to cover the counters, and
I'll do the walls between cabinet bottoms and counter tops in granite
tiles set on the diagonal. While reading up on granite installation, the
book indicates that granite and marble pros install with silicone rather
than mortar. It would seem to me that the flexibility of silicone would
put the granite at greater risk for breakage if something heaver ever
fell on it (I could envision a heavy pot from a pot rack falling on a
tile). Aside from that, I have a hard time imagining a silicone holding
tiles on a wall during installation.

I have installed marble on the floors and walls of my bathrooms with no
trouble and plan to use mortar for my granite over a bed of 3/4" plywood
covered by a 1/2" layer of backer board. Should I investigate this
silicone thing further or just go with my original plan?

--
-linux_lad
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I'd stick with the mortar base and the proper thinset. Solid surface
granite or marble (not individual tile pieces) are installed for the
most part with silicone. it appears you're installing tiles.

As to your base, a mortar bed of 1" or so over kraft paper should be
sufficient over the 3/4" plywood. I believe the 1/2" backer added in
there would be overkill. either way you choose, ensure that there's
proper crossbracing front to back built into the cabinet under that
plywood, so the plywood's not only supported at the perimeter, but down
the center as well.