Replace plastic shower with tile. Looks like it had been glued on. After the tile adhesive sets for 20 to 30 minutes remove the plastic spacers between tiles. When it comes time to demolish the shower in the future it is easier because the shower pan will pull up as one piece. Using fiberglass or acrylic shower pans makes do-it-yourself shower tiling a more realistic project than tiling the pans.
Remove the metal drip rail if necessary for plastic seal access. Changing a shower pan must be considered radical surgery. Remove any ceramic tile on the walls around the pan down to about 12 inches 3048 cm above the floor by chipping at the tile with the flathead screwdriver. If removing silicone sealant from between tiles and plastic shower trays or baths be careful not to damage the plastic with the blade. At about a foot off the floor cut into a grout line with a dry cut-off saw.
One downside however is that custom tile showers are almost always more expensive than prefabricated shower units. In the latter the bottom edge of the fiberglass wall overlaps the top edge or lip of the shower pan. After the new pan has been installed the bottom of the shower is rebuilt using new materials.
The entire floor is torn out along with most of the curb and the lower portions of the walls usually 2 or 3 rows of wall tile. Spread a layer of thin-set mortar onto the backer board in the bottom center of the back wall of the shower. Youll first need to remove your old shower tray and then replace your base frame with one suited to your Tile Redi pan of choice. It is installed in tile showers and fiberglass wall showers. Next ensure that any residual silicone sealant is completely removed from the two conjoined surfaces using your scraper again taking care not to damage any tiles or sanitaryware. Press the tiles into the mortar in the order you laid them out in. Remove the metal drip rail if necessary for plastic seal access. Where you need to cut holes in the tiles for shower faucet or showerhead stub-outs a hole saw with abrasive diamond cutting edges is the best tool.