J.B. Bobbitt wrote:
I appreciate the insight.

No, I'm not sure. The piece I cut out has no identifying or distinguishing
markings, and it looks like regular drywall. This patch is above the
pre-fab shower enclosure, but the brass threaded elbow for the shower
fixture sits behind drywall about 8" above the lip of the enclosure.

The paper on the drywall would be green if it was water resistant.


The other thing I don;t like about this arrangement is that the bottom edge
of the drywall sits on the lip of the pre-fab enclosure all along the top of
the enclosure, and the caulk seal deteriorates and looks ragged.

That's how it is done.