ghw wrote:
On Mon, 3 May 2010 07:08:09 -0700 (PDT), jamesgangnc
wrote:

On May 3, 8:33 am, ghw wrote:
Just had a new shower installed, tiles going down and overlapping the
flange of an acrylic shower base. Contractor "sealed" the tile/base
connection with grout, which soon cracked due to weight in shower and
flexibility of base. I then used grouted caulk, which now has also
cracked.

How can I seal this small gap in a way that will not crack? Or maybe I
should not worry about it (concrete backboard behind tiles).

TIA
No grout will deal with this joint. Just use regular white caulk.

The only proble with caulk is that we live in a very moist area and
regardless of havin a very good exhaust fan, mildew tends to grow on
caulk.
Properly applied it won't collect soap scum and moisture. Surface needs
to be absolutely clean (wiped prior with full strength bleach) and dry.
I get a tiny bit of mildew growing in the lower corners of our shower
stall - I just use Scrubbing Bubbles once in a while, and brush down
with bleach mebbe once a year. I leave the curtain open a bit on both
sides so air can circulate, and we have a timer on the exhaust fan so it
runs longer than we're in the room.