Hi all:

I just discovered that my existing tiled shower has been leaking for
some time, and has rotted part of the subfloor. The existing shower is
in a corner of the bathroom, with tile along two walls, an adjacent
tiled tub surround and a tile curb and floor. There is a custom glass
& chrome surround on the two outer sides that fits over the tub
surround and curb.

Once I repair the damaged subfloor, I plan to install a single-piece
fiberglass (or other synthetic material) pan so this doesn't happen
again. I have removed the lower 8" of tile on all three sides of the
shower (2 walls and tub surround), and am completely removing the
existing curb structure (which is partially rotten). I plan to cut the
existing tile backer just below the lowest remaining tile, install the
new pan, build a new curb, install new tile backer overlapping the
flange of the pan, and re-tile down to the pan. I need to put back the
curb or the existing glass surround won't fit. I have no desire (and
no budget) to have a new surround made. Some questions are...

1: I can't find a shower pan without a threshold on at least one side.
Does anyone make a one-piece 36x36 shower pan with flanges on all 4
sides (no threshold)?

2: If not, how do I waterproof the joint between the new tiled curb and
the pan threshold since there's no flange? I am concerned that this
might become my new leak point.

3: As I said, I will have to remove the lower part of the tile backer
from the walls to get the new pan in place. How far up should this
seam in the tile backer be from the pan? I'm thinking 8-12 inches.

Thanks in advance,

John.