Hi, sorry if this is a silly question but I can't seem to find a definitive answer. I'm about to start tiling and currently it's just the door linings in place, no architrave etc yet. Should the tiles be fitted up next to the door linings with a small expansion gap and then siliconed or should I cut the bottoms of the frames and slide the tiles underneath?

The latter would look better but isn't there the potential for the frame to drop if not supported from the floor as well as the screws into the walls?

 

Many thanks 

whats the other side ? normal to put the bar under the door to hide the join of different materials.

I tiled first and door linings sat down on top. 
I would cut the bottom of the lining with a multi tool sat on top of a tile to get the correct height then slide the tile under. 
 

look so much better. 

Admittedly this was home improvement rather than as part of a build, but we cut all the door frames and slid the tiles under. Definitely the "cleaner" approach.