Tile and stone can be applied directly to the surface of this pre-pitched shower pan, allowing for installation and tiling in the same day, the firm says. The preformed base includes an integrated 2-inch PVC drain as well as tile setting materials. A variety of curb options and drain configurations are available within each of the three one-piece styles: Redi Base,  Redi Trench, and Redi Free, which has a barrier-free entrance. Optional features include a pre-formed Redi Bench as well as recessed and corner storage ledges. www.americanstandard.com.