Concrete Board an ungrouted seam... (again)

[Guest guest]

New shower with a ledge to put shampoo, soap, etc on. the seam beneath the tiles

used to face the ledge are not sealed to the tile beneath. The facing tiles are

about two inches and the tiles underneath but up to them. No grout and nto a

tight groutless seam.

This seems to be a potential problem to me unless cement board doe does not

mold, but then having any seam where any mositure can eventually get into a

shower wall does not seem right.

This is a no brainer, right? Contractor I think already thinks I am a nut.

Does concrete board not mold? I would be relieved if not but still think this

should be grouted.

We are thiking to get a moisture meter and measure to make sure moisture has not

already goten in there.. any thoughts on how to proceed?

Thanks..

Robin