How to Elevate Shower Floors

Stand the shower tray on top of the existing shower floor. Mark on the tray the location of the waste outlet hole in the existing floor using a pencil. Mark on the shower floor the edges of the shower tray. Remove the tray. Dry the shower floor with a towel.

Mix a batch of cement from one part cement, three parts sand and one part water. Lay a line of cement along the edges marked of the shower floor using a trowel. Lay a line of bricks on the cement, with more cement placed between the bricks, and cement between the bricks and any walls the shower butts up with. If the shower floor needs to be higher than this, lay another line of cement and lay more bricks.

Place a PVC pipe over the mark for the drain hole in the shower tray. Draw around the PVC pipe on the tray. Remove the pipe. Cut along the marked line with a craft knife to make a hole large enough for the PVC pipe to fit. Slide the pipe through the hole in the tray.

Stand the tray on the top of the bricks so it sits over the shower floor, to check the pipe is long enough to reach the waste outlet. Mark on the pipe the point where the pipe comes out of the shower tray. Remove the tray. Slide the pipe out of the tray. Cut the pipe at the marked point using a hacksaw.

Place the pipe over the waste outlet. Fill the shower floor around the pipe with gravel. Fill the rest of the shower floor with sand up to the top of the bricks. Compact the sand using a brick or piece of wood to push the sand down into a densely packed mass. Place the shower tray on top of the sand and push it down so the PVC pipe peeks through the hole in the tray.

Screw the shower tray waste outlet cover onto the top of the PVC pipe. Clip the waste outlet cover into the shower tray. Apply a waterproof silicone sealant around the edge of the shower tray, where it connects with the new bricks and also with any walls or other surfaces around the shower. Apply liquid sealant to the bricks and mortar. Wait 24 hours for the sealant and silicone to dry before using the shower.