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  1. #1
    Join Date
    Feb 2016
    Location
    Texas
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  2. #2
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Furnace flue insulation

    Do you mean rated to catch itself on fire? If so, maybe ... because of that foam.

    If you are asking if that foam makes it 'fire rated' ... no it does not ... and not only does that foam not make it fire rated, that foam can create fire issues by allowing that flue to overheat.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  3. #3
    Join Date
    Feb 2016
    Location
    Texas
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    Default Re: Furnace flue insulation

    Quote Originally Posted by Jerry Peck View Post
    Do you mean rated to catch itself on fire? If so, maybe ... because of that foam.

    If you are asking if that foam makes it 'fire rated' ... no it does not ... and not only does that foam not make it fire rated, that foam can create fire issues by allowing that flue to overheat.

    Thanks


  4. #4
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Furnace flue insulation

    They (whomever 'they' may be) will tell you that is special foam and is 'fire rated' - it is not.

    That foam does have the color of foams which are approved for use as 'fireblocking' and 'draftstopping', but neither has anything to do with any 'fire rating' of anything.

    Just be ready for that come back 'But that foam is fire rated' ... that is simply evidence that 'they' do not know what 'they' are doing or talking about.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

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