Designing a walk-in shower requires planning the space so the water does not splash out of the opening since there is no door. The shower also requires a sloped floor to direct water to the drain. Other considerations include ventilation, lighting and safety.
Designing a shower that eliminates the shower door takes more space than traditional showers or tub-shower combinations. The minimum size for a walk-in shower is 42 inches by 60 inches. A low-flow rainfall showerhead or hand-held shower helps to reduce the splash. While a shower threshold makes it easier to ensure all the water drains from the unit, it is possible to install these showers without thresholds with special framing under the shower floor.
Planning the open-door shower requires planning ventilation that removes the humidity it creates without causing a cold draft to fill the space. The wall by the opening often prevents light from reaching the new shower room, so it requires installing moisture resistant lighting.
Safety is another important consideration in the planning stage. Creating a non-slip floor for the wet environment is one of the primary concerns. Tumbled stones or small tiles that include a network of grout are one way to create the nonslip surface. Adding a shower bench and designer grip-bars improves safety while maintaining the good looks of the shower.