Shower Pan and Base Types Compared

The shower pan or base is the foundation of the shower. Preformed bases made of acrylic, fiberglass or solid surface come in standard sizes with the slope molded in, so they install quickly and can be used under panel walls or tile. Foam trays and boards have the slope built in, are lightweight and accept tile directly, with a waterproof surface. A mortar pan, built on site, is a sloped bed of mortar over a waterproof liner or membrane and can be made in any size or shape, which is why it is common for custom tile showers.

Curbless systems use a recessed floor and a sloped or linear drain to remove the step at the entry. Each pan type has trade-offs in cost, build time, size flexibility and skill needed. What they share is the same job: collect water and carry it to the drain without leaking. The drain connection, the slope and the waterproofing at the edges decide whether the base lasts. In Nashville, we choose the pan type with you based on the shower size, the tile plan, accessibility needs and the framing under the floor.

Best for

• Homeowners choosing a pan type
• Custom tile shower planners
• Accessible shower projects
• Contractors comparing systems