My son is replacing the ceramic tile in his shower. He has removed
and is replacing the wall tiles now, but problems with the floor of
the shower, they are original to the house about 20 years old and on a
concrete base.

Should he try to remove the grout and try to chip each one out?, start
from an edge? cover the old tiles and tile over raising the drain
cover? OR WHAT?????

Thanks much

Marshel OShields