Drilling into tiled end walls will be easier if the the entire frame is positioned so mounting screws can be installed in grout joints.
The flooring was white porcelain tile with tight grout joints for easy cleaning if a body bag sprang a leak.
Verna knew that such intricate and precise patterns in the stone floors, set with such tight grout joints, could have been created only by the most talented master craftsmen in all of the New World.
Recently, I attempted to clean a sanded grout joint with a mild solution of muriatic acid and water.
If the end walls are tiled, position the entire frame so that mounting screws in the jambs can be installed in grout joints between tiles.
However, in many cases you will have to fill in the grout joints in the old tile first to make the surface level (in some cases, the new adhesive will take care of this; in others, you must use a separate filler).
While it is possible that crumbling grout joints can signal a possible problem with the underlying substrate, usually a few cracks here and there are indicative of grout that was improperly mixed.
Quarry tile is used less often as a wall finish and is occasionally used for countertops, although the wide grout joints can make cleaning of countertops difficult.
Chances are you will have to fill in the grout joints and level out the old floor first, especially if you are going to put down vinyl.