I want to do away with a shower tray and increase the size of my shower area by tiling. Can you get pre made concrete trays to tile on ? and would any plumb centre sell the approiate waterproof membrane ? or is this a serious job and not for a d.i.y.er ?
You can make a lead tray(box) then fit a waste through it, add your cement let it harden then fit tiles in the normal way. It means that you can go to almost any size, if the waste is sufficient.
Basically you're talking about making a wet room. There are various techniques for this using products like Wedi board. A Google on wet rooms should give you a few leads.
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