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  1. #1
    David King's Avatar
    David King Guest

    Default Air gap in chimney exterior wall ?

    Hi all,

    My first post in IN. I came across this air gap in a chimney face, just under the chimney cap. Gap was clean and rectangular; looked like it was built this way. There is a flue/liner in the chimney for exhausting the gas water heater.
    Can I assume that this air gap is normal and used for some form of chimney venting ?

    Thanks / Dave

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  2. #2
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    5,005

    Default Re: Air gap in chimney exterior wall ?

    I have not seen anything like that ever in a masonry chimney. So I would say it is not normal.


  3. #3
    Join Date
    Mar 2007
    Location
    Lake Barrington, IL
    Posts
    1,363

    Default Re: Air gap in chimney exterior wall ?

    If I'm looking at what I think I am, it should not be there. That's enough reason to have it checked out to be sure.

    Eric Barker, ACI
    Lake Barrington, IL

  4. #4
    David King's Avatar
    David King Guest

    Default Re: Air gap in chimney exterior wall ?

    Raymond / Eric,

    Thanks for your reply. I had already reported "further investigation required".....just wanted to be sure that I was on the right track.

    Photo is taken looking up under the chimney cap...does seem odd that the gap is so uniform.

    Dave


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