How to Install a Shower Pan on a Raised Slab

Dry-lay the pan in place on top of the raised slab where you want to install it. Ensure that it is tight against the wall studs in the corner where it will be installed. Use the pencil to draw an outline on the floor according to the outer dimensions of the shower pan to use as a reference point for smearing your thinset mortar. Remove the pan.

Mix up some of the thinset mortar in your bucket using the drill and beater. For the purposes of a pan, you only need about a quarter of a 3-gallon bucket of thinset, so add that amount of dry mix and just enough water until you achieve a thick, creamy mixture. Add the water slowly until you have your mix.

Smear the thinset onto the raised slab within the pencil lines you drew earlier using the notched trowel. Cover the entire area with an even layer of mortar. Set the pan in place and press it down firmly in place using your hands. Scoot it back and forth in all directions slightly to ensure the pan bonds with the thinset mortar.

Push the pan up against the wall studs. Switch the attachment on the drill out to the screw attachment. Attach the flanges to the studs with wood screws and let the mortar dry for 24 hours before installing the wall panels or doing any other installation that requires actually stepping inside of the pan.