You actually need a contiguous membrane that covers the entire floor and then goes up the walls.
Tiled shower floor on concrete slab.
This step is critical and we dive into grea.
Then staple down a layer of metal lath.
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You should already have the shower curb formed with 3 2x4s stacked on top of each other and fastened securely to the floor.
While the bathtub is a much needed commodity for many others prefer.
Wanting no lip to allow wheelchair access but contractor said he would have to jackhammer out the flor to lower the shower pan so the water would drain i have never seen a shower pan that took.
If building on a plywood surface you must first lay down a layer of felt paper isolates concrete from floor movement.
Remember tile and mortar are not waterproof.
But larger cracks especially those that are higher on one side than the other may telegraph through the tile and cause it to crack.
Since the shower is a potentially hazardous area it is recommended to use only ceramic glazed or tiles.
In a way it s just a glorified zero threshold shower that extends into the room.
But it s more complicated than just having a concrete slab and some magic transition piece at the walls.
Installing a tile shower floor is not difficult and will only take one weekend to complete.
Mix cement with just enough water to get it to hold shape.
Small cracks caused by shrinkage usually do not present a problem.
And american contractors do know how to build those.
Pre slope is required in order to allow water collected on the shower membrane to drain into the weep holes of your shower drain assembly.
As long as the concrete slab is clean flat and free of active cracks you can lay title directly on the concrete floor using thin set adhesive.