Finishing Up
Working my way across the shower floor, I pieced in the membrane over to the partition on the other side of the shower. Again I installed a strip along the seam between the floor and the wall and used a manufactured inside corner for the corner of the shower.
At the end of the partition I wrapped the bottom of the wall with two factory-made outside corners.
I then continued the waterproofing membrane a safe distance onto the floor of the main bathroom.
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Tiling a Walk-In Shower: A Strong and Waterproof Shower Seat
How gussets cut from 2-inch thick Kerdi board were used to frame the rot-proof seat for a walk-in shower.