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2g4r_tofu t1_je5r3dn wrote

Not a plumber but the liner usually goes on the inside of the walls so the bottom of the wall isn't sitting in water.

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vivamario t1_je66wfo wrote

No, shower pan membranes should go behind the cement board. The cement board should just stop above the finished floor height.

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MainOld697 t1_je61dkz wrote

Concrete has been poured, this isn't "sitting in water" at any point.

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