Hello, I am new to this forum and hope to get some helpful advice.
Since I need to replace the floor tiles in our bathroom, I also wanted to renew the old shower at the same time. The plan was, of course, for a walk-in shower, although I was aware that a certain depth is required to create the approximately 2° slope. Under the old shower tray, there was a kind of concrete foundation (?), on which the shower tray was placed. After carefully breaking up the entire foundation, I found not only the drain but also the water pipes for the shower and the adjacent washbasin (there are no plans available, so I couldn’t check this beforehand).
Now my question (photo attached):
The idea of the walk-in shower is obviously off the table. I will simply install a standard but lower shower tray. I am familiar with the complete process, such as applying sealing tape, sealing with liquid membrane, and so on. But what could I put the shower tray on if I don’t want to fill the whole “hole” with concrete again? Could I glue building boards (for sanitary areas) in place and then install the tray on top? I want to complete this as simply and quickly as possible.
I appreciate any suggestions.
Best regards, Florian

Since I need to replace the floor tiles in our bathroom, I also wanted to renew the old shower at the same time. The plan was, of course, for a walk-in shower, although I was aware that a certain depth is required to create the approximately 2° slope. Under the old shower tray, there was a kind of concrete foundation (?), on which the shower tray was placed. After carefully breaking up the entire foundation, I found not only the drain but also the water pipes for the shower and the adjacent washbasin (there are no plans available, so I couldn’t check this beforehand).
Now my question (photo attached):
The idea of the walk-in shower is obviously off the table. I will simply install a standard but lower shower tray. I am familiar with the complete process, such as applying sealing tape, sealing with liquid membrane, and so on. But what could I put the shower tray on if I don’t want to fill the whole “hole” with concrete again? Could I glue building boards (for sanitary areas) in place and then install the tray on top? I want to complete this as simply and quickly as possible.
I appreciate any suggestions.
Best regards, Florian
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OutcastNRW27 May 2022 10:50toast555 schrieb:
But what could I place the shower tray on?There are shower tray supports for that—small feet and angle brackets for the wall. These allow you to securely position the shower tray (if you want, you can even embed the feet in small spots of screed) and perfectly level it.Depending on the height and type of shower tray, there are different options. The feet can sometimes be freely positioned. You can either just place the shower tray on top or screw the feet securely to it, for example:
toast555 schrieb:
Or are the feet adjustable?They should be. That’s what they’re for—to compensate for uneven surfaces.Similar topics