There are a couple of options to create a shower floor for tile using deck mud.
How to install mud in shower floor.
The top of the drain should be 2 inches above floor height and you want to mark the walls and curb to a height 2 3 4 inches above the floor as a guide to the amount of mud you need to maintain a 3 4 inch slope.
Installing a mud base for a shower stall.
The first is a single layer shower floor which can then be coated with redgard or a similar product or covered with kerdi to waterproof it.
Prefabricated shower units offer homeowners and builders a relatively easy shower installation option but a limited selection of designs and materials.
This thin bed mud approach is also the method of choice when building a barrier free bath where the floor of the bathroom connects directly with the floor of the shower rather than being separated by a curb see a sloping floor for a barrier free bath and also our full video series on the same topic.
The other is a normal shower floor with a liner which will have two layers a preslope the liner then the top slope which.