Waterproofing the Seat
After assembling the seat, the crew member waterproofs every seam and integrates the seat into the waterproof interior of the shower. First, he spreads thinset to bed a strip of Kerdi membrane between the seat top and the back wall.
He presses the membrane strip into the thinset and squeezes out the excess with a margin trowel.
Likewise, he spreads mortar over the front edge of the trowel on both the slanted face and the seat top.
He wraps the front edge with a strip of tape pressed into the mortar. To smooth the strip, he starts at the center and works his way to both ends to avoid wrinkles in the strip. The rest of the seams are treated in the same way to finish the waterproof seat so it is ready for tile.
Install the Seat and Face-
How to Lay Out Subway Tile
As part of a series on building a large walk-in shower, tile pro Tom Meehan explains the layout of a classic subway tile pattern.
