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  1. #1
    Join Date
    Jul 2014
    Posts
    1

    Default Tilting Chimney in the attic

    We have a 100 year old house with a chimney that goes through the center of the house, through the unfinished attic and out the center of the roof. The chimney in the attic has a little lean from the attic floor to the attic ceiling. There are no cracks in the plaster walls or ceilings in the house near the chimney. The chimney that exits the roof is straight. I think I remember seeing an article in This Old House magazine quite a few years back that explained that the home builders of old tilted the chimney intentionally so that water/rain would not put our the fires in the fireplace (chimney caps were not originally placed on the chimney). Does anyone else recall this practice or article???

  2. #2
    Join Date
    Jul 2014
    Posts
    71

    Default Re: Tilting Chimney in the attic

    To my knowledge it was simply done in order to exit the roof at the peak where it is much easier to make it water tight

  3. #3
    Join Date
    Sep 2012
    Location
    Boston
    Posts
    1,002

    Default Re: Tilting Chimney in the attic

    the exact reason it was done is something i'm not 100% sure of but i can tell you it's very common to have chimney's at a slant going up through the house. we're dealing with one now on a job we are currently doing. as long as it's in good shape there are no worries but i would recommend having it checked out by a good mason or engineer. we have an engineer coming tomorrow to check ours out do to some major structural cracks.

  4. #4
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,998

    Default Re: Tilting Chimney in the attic

    It was generally done so the chimney did not cut through the ridge beam.

    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  5. #5
    Join Date
    Jul 2014
    Posts
    71

    Default Re: Tilting Chimney in the attic

    i dissagree JLMCDANIEL most i have seen offset so they exit through the ridge

  6. #6
    Join Date
    Jan 2008
    Posts
    2,609

    Default Re: Tilting Chimney in the attic

    I've seen it both ways, to center the ridge and to miss it. Doesn't seem to matter as long as it's water-tight. What does matter is that the masonry be in very good condition top to bottom, as this offset adds load to one side while reducing it on the opposite side, and that can cause old mortar to fail and joints to open- not what you want happening with a chimney!

    Phil

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