I am rebuilding my kitchen island it has a half wall already installed which is secured to the concrete floor. I want to extend the wall and make the island bigger. To do that the wall will extend over existing tile. Is it OK to drill holes through the grout and fasten the wall extension to the concrete. The wall would be on top of the ceramic tile or would it be better to cut out the tile a space big enough to put the wood wall directly to the concrete subfloor.
I have seen it done both ways but which is the best and most correct way to build it?