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Thread: add subfloor in basement bathroom

  1. #1
    DIY Senior Member diyfun's Avatar
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    Default add subfloor in basement bathroom

    I am add 1" foam and 23/32" subfloor on the basmenet floor. So the floor level will rise about 2". in the bathroom, there are toilet, cleanout and floor drain. how can layout there to make them still function properly and the finishing result also looks good?
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    Test, Don't Guess! cacher_chick's Avatar
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    You will need to break the floor and extend the risers up to the new floor height.

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    DIY Senior Member diyfun's Avatar
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    Quote Originally Posted by cacher_chick View Post
    You will need to break the floor and extend the risers up to the new floor height.
    This is a really bad news to me.

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    Test, Don't Guess! cacher_chick's Avatar
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    It's part of the job.
    The toilet flange needs to be on top of the finished floor. The only right way to fix it is to break concrete and rework the riser.

    The cleanout needs to be accessible, so you could just do an access panel for it.

    If you are not required to have a floor drain, it can be sealed and covered over. If the room floods, a drain will not save your new subfloor. I would be just as concerned with the possibility of the drain backing up and causing the flood.

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    DIY Senior Member diyfun's Avatar
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    can I use the this type of flange to avoid rework the riser for toilet?

    how big the panel will be for the cleanout access opening?
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    In the Trades Gary Swart's Avatar
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    Poor choice. Plastic flanges tend to break. You seem to think that breaking out some concrete is a huge deal. It's not. A small rotary hammer/drill will make short work of it. This is not a place for a Mickey Mouse job.

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    ACO Shower Drain Sales johnfrwhipple's Avatar
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    What about adding a clean out on the vertical leg of the main stack? Is it then possible to set in a twist and set Water Closet Flange without busting up the concrete?

    JW


    jfrwhipple@gmail.com - www-no-curb.com - 604 506 6792

    Always get construction advice double checked by your local city hall. Flood Test Every Shower - Every Time.

  8. #8
    Test, Don't Guess! cacher_chick's Avatar
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    I would never use any kind of a flange that just pushes into the pipe. I really doubt that it would ever pass a pressure test either.

    If it was mine I would do it right the first time. If you want to do a hack job, at least do one that will last as long at you will.

  9. #9
    DIY Senior Member diyfun's Avatar
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    Quote Originally Posted by johnfrwhipple View Post
    What about adding a clean out on the vertical leg of the main stack? Is it then possible to set in a twist and set Water Closet Flange without busting up the concrete?

    JW
    I just found there are two cleanouts there. Which one plumber will use or they are for different purpose?
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