In our kitchen, we are using mostly wood flooring, however one section will be porcelain (mock slate) tile. We got lucky and found a tile/cement-board combination that gives us the exact same height as the 3/4" hardwood.

Now when we transition from the wood floor to the tile, we don't want to use any kind of molding or trim... we'd rather have the clean line with just a grout joint between them.

Also, the wood planks are oriented such that they run perpendicular to the transition line between the wood and tile, so the butt ends of the planks (not the long sides) butt against the tile.

It was told to me by one person that I can't do this because if the wood expands, it could cause the tiles to pop. However I was under the impression that when wood expands, the planks widen, not grow in length.

I've also heard you can buy colored caulk that looks like grout, but remains flexible after it dries, so that it will "give" if the wood does expand a little.



Any suggestions or advice here would be greatly appreciated!

Thanks

Lots of times it is done with just foam backer rod and sanded caulk, in the gap you must leave with a solid on the width. Sometimes it fails and the tile cracks or the wood buckles. Just depends if you acclimated the wood flooring and have a moisture meter to varify it and know what % the moisture content should be at a given temp and humidity, and you maintain that humidity level, not letting the interior humidity elevate more then the day it was installed.