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  1. #1
    Clay White's Avatar
    Clay White Guest

    Default Air duct interface with slab

    Last edited by Clay White; 12-26-2007 at 11:11 AM.
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  2. #2
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,521

    Default Re: Air duct interface with slab

    If they have ducts in the slab, that bit of missing sealant around that duct is the least of their worry.


  3. #3
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Air duct interface with slab

    Quote Originally Posted by Clay White View Post
    I fairly sure there are metal ducts in the slab.

    Then this is worth repeating:

    Quote Originally Posted by Rick Hurst View Post
    If they have ducts in the slab, that bit of missing sealant around that duct is the least of their worry.


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

  4. #4
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,245

    Default Re: Air duct interface with slab

    Rust, water infiltration, mold, musty, nasty, rodents, etc.
    Other than that, they are just fine and are still allowed with certain restrictions if you are not in a flood prone area.

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  5. #5
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    3,154

    Default Re: Air duct interface with slab

    Ducting in the slab is required to be completely encased. I cannot recall for sure, but I think it is a minimum of 2". However, they are often not encased and the bottom of the duct, in contact with soil, will rust out. In addition, as the duct is below grade, and concrete will often crack, the ducting could very well ship water into it.

    Since this is a visual inspection, defer to an HVAC contractor.

    Department of Redundancy Department
    Supreme Emperor of Hyperbole
    http://www.FullCircleInspect.com/

  6. #6
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,521

    Default Re: Air duct interface with slab

    Ducts in the slab is just one of the contributors to the downfall use of Chlordane. Many termite control persons have actually drilled into the slab and accidentally pumped chemical into these ducts. Cleanup costs were outrageous and led to lawsuits.

    I personally know of (1) case here in the DFW area.

    If you like the musty smell, thats a reason to consider them I guess.

    rick


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