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Thread: Toilet Flange Height

  1. #1
    DIY Senior Member seaneys's Avatar
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    May 2007
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    Chicago Suburbs
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    192

    Default Toilet Flange Height

    Hello,

    I'm roughing in a toilet to a new bathroom. The finished floor is not installed.

    When roughing in a toilet flange, is it best to mount the flange directly on the sub floor? I'm wondering if I should leave a gap to compensate for the tile thickness.

    Thanks,
    Steve

  2. #2
    Plumber Cass's Avatar
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    Nov 2005
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    Ohio
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    5,984

    Default

    All toilet flanges should be installed and screwed/secured to the finished floor.

    Never the sub floor. The screws can penetrate through the finished floor to the sub floor but the flange needs to be sitting on the finished floor.

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    Cave Creek, Arizona
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    25,624

    Default flange

    I would leave the flange off until the flooring is finished. Otherwise it becomes a challenge to fit the flooring around the pipe under the flange. It appears that the Grand Canyon is getting larger.

    Yes, the canyon got a little bigger.
    I upped the pixel counts to 200.
    Terry
    Last edited by Terry; 01-15-2008 at 08:46 AM.

  4. #4

    Default

    I was looking at the new Code Chek book at Homey and it said the flange must be installed flush with the finished floor. I just laughed all the way home. Who writes those things, anyway?

    Yes, the flange goes on top of the finished floor.

    If there's tile, I usually install a plywood donut the thickness of the tile and screw through flange, donut, and subfloor.

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