How to Build a Corner Shower Pan

Cover the corner shower floor with tar paper and wire mesh, tacking both to the flooring boards with nails and a hammer. Cut out the material covering the drain hole with wire snips and a razor. Install the drain in the hole by screwing the drain to the floor with the bolts provided with the drain, using a wrench.

Mix up a batch of sand mix cement by following the manufacturer's instructions. Add the mix to the floor and sculpt a layer that is 1 1/2 inches thick, with a gradual slope toward the drain. Check the slope with a carpenter's level. Make sure the floor has a slope reading of at least a quarter off center all the way around. If it doesn't, adjust the layer with the trowel by packing it down or adding cement where necessary. Allow the cement to dry for 24 hours.

Apply a shower liner over the cement floor and tack the edges of the liner to the wall frames surrounding the pan. Cover both side walls in the corner shower with about a foot of shower liner material. Nail the liner to the walls with hammer and nails, cutting off the excess after the liner is nailed into place.

Attach the top flange of the drain to the bottom portion installed in the floor drain hole. Screw the flange in place with the drain's mounting bolts and a hand wrench. For a watertight seal, apply silicone around the underside of the flange before attaching it.

Apply cement over the shower liner with a trowel. Sculpt the cement to follow the transition of the layer below it, using a hand trowel. Use the level to ensure that you have a consistent slope. Let this layer of cement cure for 24 hours before using the pan.