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Shower drain under concrete?

5 years ago
last modified: 5 years ago

I’m hoping this is ok but I’m worried. I came home today and the tiling contractor said they poured our shower pan, after they left I went to look and they poured concrete over our $200 linear drain. I looked online and can’t find anything that says to install this way ?!


Comments (15)

  • 5 years ago

    And have they explained how they are going to access the drain pan? When I did mine, I made a wood form that fit inside the drain pan, and the concrete was poured flush with the edges of the drain. When the concrete was cured, I lifted out the form. I can't even tell where your linear drain is.

  • 5 years ago

    They will be back tomorrow or Monday so I can start asking questions. The way you explain it is similar to everything I’ve seen online and would have expected

  • 5 years ago

    Maybe it is covered with a thin layer of concrete, but, if so, it's not clear that they know what they are doing. The top edge of the drain pan should be level with where the top surface of the installed tile will end up. I don't know how they will achieve this, unless they simply have a drain pipe there and will install the drain pan on top of the concrete and then bring the tiled surface up later. Good luck. Please update when you figure out what they are doing.

  • 5 years ago

    I hope they're not done with the waterproofing of the walls either. In fact, why weren't the rest of the walls installed before they poured the floor?


  • PRO
    5 years ago

    Don't mean to pile on here, but that's also an extremely wet mix, with no clear indication of a slope (I would expect the reflection to bend to one side or the other).


    Yes, it's time for a conversation with your contractor.

  • 5 years ago

    Ripped Jeans-

    I noticed that, too. The only thing I can think is that they are going to put a sloped bed in on top of that one. I still have no idea of how they are putting in a linear drain.

  • 5 years ago

    Idk, but would it help to mark the spot where you think the drain is?

  • 5 years ago
    last modified: 5 years ago

    we had to open the top wall back up to ensure there is sufficient blocking on the left side of the wall for the glass installer to secure the clips. It will be 1/2“ glass and the weight has them concerned. So that top half not being closed yet doesn’t scare me as much, once the GC puts in more blocking they can close it up. The amount of water was really strange to me too, but maybe there is some method to this madness, it is definitely level right now, not sloped. My best guess is they somehow cut out the drain and then do a second layer that is sloped on top of this


    I’ll keep everyone posted, I could hardly sleep last night not knowing what is going on!

  • 5 years ago

    In addition the concerns with pan/drain. I see bare wood in the niche (which is never a good sign) and the cement board does not look like it has the proper amount of screws. And has that Redguard been gauged in thickness as it appears a little on the thin side.

  • 5 years ago

    @millworkman how thick is the Redguard supposed to be?

  • 5 years ago
    last modified: 5 years ago

    Last line, bottom of page 4 of the instructions/data sheet, you should be sure to read the entire pdf as there is more to it than just this.






  • PRO
    5 years ago
    last modified: 5 years ago

    Maybe they taught concrete is "Pervious"

    Let us know please what the answer will be after you question that.

  • 5 years ago

    Well all the floor tile went in and I can’t walk on it until tomorrow and quite see in the shower. I asked them and they used that to start the pan and trimmed out the drain that was covered in tape, they then evened it out and used mortar to slope and reinstal. We shall see when I can walk in there and take pictures tomorrow

  • 5 years ago

    I'll be interested to see the final result.

  • 5 years ago
    last modified: 5 years ago

    "I'll be interested to see the final result."


    Me too. As well as the results from the flood test.

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