A shower installed in your bathroom is a good alternative to a bathtub which may take more floor space. Some just may prefer a shower to a bathtub. One of the keys to installing a waterproof shower is the installation of a shower tray. A shower tray is moulded from fibreglass or plastic in one piece to prevent leaks at joints. A shower tray needs to be installed properly to ensure it is adequately supported.
Install a shower drain kit into the hole in the bottom of the shower tray according to the instructions that came with the drain kit.
Lower the shower tray into position on the floor, ensuring that the drain installed in the tray lines up with the waste pipe in the floor. Ensure also that the edges of the tray are flush with the wall studs and the front of the tray is resting on the floor.
Place a level on the base of the shower tray. Place wood shims under the tray until it is level in all directions. Make pencil marks along the wall studs where the top flange of the tray meets the studs. Lift the tray straight up and remove it from the floor temporarily.
Mix mortar or plaster according to the directions on the bag to use as a bedding material for the shower tray. Do not use concrete as a bedding material.
Pour the bedding material onto the floor where the shower tray will reside. Do not get any bedding material into the waste pipe opening, Ensure there is enough bedding material to support the entire underside of the tray. Spread the bedding with a trowel.
Lower the tray into position on the floor before the bedding material starts to set, ensuring that the drain installed in the tray is inserted into the waste pipe in the floor. Press down on the tray until the flange along the edge of the tray lines up with the pencil marks made on the wall studs earlier and the front lower edge of the tray is touching the floor.
Place a level on the tray to ensure it is level in all directions. Place wood shims under the tray to level it if necessary until the bedding material settles and supports the tray. Scrape up any excess bedding material that may have squeezed out with a trowel. Wipe up any remaining excess material with a sponge and bucket.
Allow the bedding material to harden completely before putting any weight on the bottom of the shower tray. Remove the shims, if applicable.
Have a licensed plumber install all plumbing needed for the shower before the tray is installed. Have the instructions for the shower tray available for the plumber so that the correct opening for the floor drain and the distance the waste pipe should be protruding from the floor can be achieved.