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Thread: Vent flashing

  1. #1
    Jeff Eastman's Avatar
    Jeff Eastman Guest

    Default Vent flashing

    Last edited by Jeff Eastman; 12-11-2007 at 07:25 PM.
    Crawl Space Creeper

  2. #2
    Join Date
    Mar 2007
    Location
    Ft. Myers, FL
    Posts
    363

    Default Re: Vent flashing

    If there is staining on the sheathing in the attic it is, or was previously leaking. I would just report what I saw.

    Paul Kondzich
    Ft. Myers, FL.

  3. #3
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,311

    Default Re: Vent flashing

    Quote Originally Posted by Jeff Eastman View Post
    In the attic there is water staining on the roof decking where the water heater vent exits the roof. The base flashing looks okay to me but does anyone see anything wrong?

    Jeff,

    Other than the Big Old Nasty Patch beside it and the Rusty Flue Pipe? No.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

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

    Default Re: Vent flashing

    Were there any new(er) vent sections down inside?

    Wast the water heater replaced?

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

  5. #5
    Kevin Barre's Avatar
    Kevin Barre Guest

    Default Re: Vent flashing

    Yeah...I see something wrong. Unless I am not seeing things clearly, it looks like your storm collar has no caulking at the inside radius where it meets the flue. If you aren't familiar with the term, the storm collar is the section of the flashing just above the base flashing. It looks like a pie plate pulled upside-down over the flue where it meets the base flashing.
    It's just a small gap, but some water will seep through the gap. Over a few years, this will collect in the depressions around the inlet and outlet fittings on top of the water heater, corroding them and causing premature failure of the water heater --assuming the flue is a straight run up thru the roof. If the flue is not straight up, the water can collect at a bend in the flue and drip thru the ceiling insulation.

    Based on the two concentric rings visible on the flue above the current storm collar location, it appears that the water heater has either been replaced or moved up a couple of times. Perhaps the water heaters fail due to corrosion from a leaking flue and the plumbers aren't aware of the root cause and just keep replacing the WH.

    If this is not clear, email me and I can provide better photos.


  6. #6
    Join Date
    Mar 2007
    Location
    Fletcher, NC
    Posts
    28,032

    Default Re: Vent flashing

    Quote Originally Posted by Kevin Barre View Post
    Based on the two concentric rings visible on the flue above the current storm collar location, it appears that the water heater has either been replaced or moved up a couple of times.
    Yeppers, that's what I was referring to.

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

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