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  1. #1
    Join Date
    Jan 2009
    Posts
    1

    Default Adding fireplace flue thru attic/vapor barrier

    When I built my house in 2001 my wife and I added a cavity in an interior corner to later add a fireplace. I want to now add the fireplace, but realize my only way to add a flue is through the roof and through the vapor barrier (going through the exterior wall is not an option).
    How do I install the flue through the roof and maintain the vapor barrier's integrity?
    Thanks!

  2. #2
    Join Date
    Aug 2008
    Posts
    54

    Default Re: Adding fireplace flue thru attic/vapor barrier

    You will need to maintain a minimum distance from combustibles per NFPA code. Use insulshield or flashing to dam existing insulation away to maintain this distance. Use high temperature silicone to seal gaps between panning and flue pipe. High temp silicone is generally red in color, and you can probably find it in auto parts stores, as well as weatherization supply houses like Applied Energy Products in Canton Ohio, or JR Products ******.

    Quote Originally Posted by brownrobf View Post
    When I built my house in 2001 my wife and I added a cavity in an interior corner to later add a fireplace. I want to now add the fireplace, but realize my only way to add a flue is through the roof and through the vapor barrier (going through the exterior wall is not an option).
    How do I install the flue through the roof and maintain the vapor barrier's integrity?
    Thanks!

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