How to build a shower curb for securing shower pan flange
My inlaws are changing stuff in their bathroom and have tasked me with helping because I've done a few of my own bathrooms. I asked her to get a corner shower with two finished curbs. They ordered the wrong item and won't return and get a smaller one with two finish curbs because they like this size better. Which means I need to build some type of curb and finish it off with tile or if I do concrete grind and polish it. I'm curious how to build a curb for this purpose. It really there to just hide the unfinished side of the pan and to give it some strength. I think my options are:
(1) Build out of wood, then cover with cement board, tape, and tile.
*seems time consuming and more costly
(2) Pour cement curb and tile it.
*no hammer drill, but I can borrower one to secure the pan in
(3) Pour cement curb up and over the flange and color/polish it.
*I don't know how well this will work because I don't know if the concrete will grab to the plastic shower pan.
Any options? check out the picture for a rough drawing