A curbless shower, also known as a barrier-free or zero-threshold shower, is a type of shower without a lip or raised edge. This allows for easy wheelchair access and eliminates the need for a step up into the shower. Curbless showers can be either square or rectangular in shape, and can be constructed using a variety of materials including tile, concrete, stone, and fiberglass.
The amount of drop required for a curbless shower will depend on the material used to construct the shower base. For example, if you are using tile, you will need to account for the thickness of the tile plus any mortar or grout that will be used to set the tile in place. Concrete and stone bases typically have a minimum 1/4 slope per foot to help drain water away from the entry point and prevent flooding. Fiberglass bases can be either level or sloped depending on your preference.
When deciding how much drop to include in your curbless shower design, it's important to consider both form and function. From a functional standpoint, you'll want to make sure that your shower base slopes enough to allow water to drain properly and prevent flooding. But you'll also want to take aesthetics into consideration - too much slope can make your bathroom look unbalanced and cluttered. Ultimately, it's important to strike a balance between these two factors to create a safe and stylish space that meets all of your needs.