For the part up the wall where there isn t tile the trim would have some sort of backing added to increase the depth where it meets the wall.
Tile around window without trim.
Cut a 45 degree angle on one end of the trim and hold it so the short end of the angle.
So a metal trim has had to be added around the wall around the windows to conceal the edges and i m assuming this will have to be done for the storage alcoves that have been built into our shower and boxing around the plumbing.
Ceramic or porcelain tiles are often preferred when using trim as heavier stone varieties often have a greater thickness and are therefore less practical.
In addition the tile edging is not expensive it is easy.
Here s how they do it.
It s all done by eye with a sharp pencil a miter saw and an 18 gauge nailer.
When installing window molding start at the top.
Instead of setting bullnose inside the recess set it on the wall surface.
Here s one kitchen where we used some trim around the window the main thing is to not see the edges of cut tile or the thinset there s no magic to the slant of a bullnose.
Use corner edging tiles.
Whether you tile around a window with a trim or with tiles is very much determined by the materials you use.
When using a trim choosing tiles which are thin is recommended.
Set the recess tiles first then the bullnose.
The tile will wrap partway up the window and the trim would sit on top of it leaving some of the tile exposed.
Alternatively depending on the style of your room some people finish with a pencil trim or something but that s not always a good solution.
To finish the edge of a tiled window you have several additional options.
Most trim carpenters don t even use a tape to trim windows.
Nonetheless you can still tile around a window using traditional techniques meaning that you just install the tiles in a corner without using a plastic trim it would take longer to get the same neat look.