Designing Kitchens and Bathrooms - Few ?'s on Tumbled Marble Backsplash

I have done my reasearch and I think I'm ready but have one question I'm hoping somethign wiht exeriance can help with and also just want to make sure I'm going to go about this the right way.

I plan to install 4"x4" tumbled marble tile over dry wall (sanded & washed) and it sounds like I should use white (tile is a light color to boot) modified thinset. My question/problem is one edge of the tile will not but up against anything so using even a 1/8th trowel one would see the thinset behind the tile.

Any thoughts on how to handle this? Can I just lay the tile at a slight angle?

Mastic adhesive is used to install tiles in backsplash area. Tiles are pressed into mastic. There will be no 1/8" problem on exposed end.

For any tile where the manufacturer does not make an edge tile or bullnose, there is a 'U' channel available is colors that will hide the edge. Similar to drywall 'J' channel one long edge fits under the tile in the mortar and fits around the edge of the tile. Another way is a carefully laid bead of caulk, though not as good looking.

Mastic sometimes does funny things to natural stone. Its a better idea to use a modified thinset. Check out the edge profiles here.

http://www.schluter.com/139.aspx

Thanks for the replies.

If I put a peice of tile on the wall tongiht, how long would I have to wait before I could safely say the masitc wouldn't discolor it or anything?

I;m not saying I will use mastic but it seems to be the best solution - assuming it didn't do anything to the tile so I'm just wonderign if it makes sense to put one tile up and wait a day or two and see what happens. If it does discolor the tile or something it's easy enough to take off one tile...

Mastics with natural stones are always risky business. The stains that could develop could take weeks to show up. ALWAYS use modified thinsets with natural stone products, never mastics or premixed thinsets.:)

A trowel that is 1/8" WILL NOT cause a 1/8" standoff.:) The standoff will be negligible but an edging is still advisable.:)

OK, thanks BUD!