Have just installed porcelain tile floor in our bathroom, adjacent to ceramic tile floor in hallway. Need to install transition in doorway between the two types of tile. Rather than drill thru the tiles to install hardwood transition, could I use some type of adhesive to glue the hardwood to the tiles. Just afraid to drill thru the tiles and have one or more of them crack! Thought about using marble transition and mortaring it in, but the marble is too thick, and will probably cause someone to trip on it. Thanks for any advice anyone might have.