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  1. #1
    Join Date
    Feb 2012
    Posts
    17

    Roof Stains caused by fuel oil dye?

    I had a new roof installed on my house several years ago and the Class A chimney for the boiler was replaced shortly thereafter since it was not up to code (too short and inadequate clearance to operating window). The light gray shingles on the downslope side of the chimney now have brown tinted stains and the contractor blames the dye in the heating oil Has anyone else run into this and found a way to remove the stains without damaging shingles?

  2. #2
    Join Date
    Jan 2012
    Location
    Broomall, PA
    Posts
    440
    i say no way, but post a pic. It's more likely condensing by the time it gets to the top. After the chimney was replaced, they shouldve done a combustion test. What was the draft at the breach, and the net stack temperature?
    Also, take a pic farther back showing chimney and surroundings.
    And if you want more advice, please post all the info about your heating unit, including nozzle size and combustion numbers.

  3. #3
    Join Date
    Jun 2004
    Location
    Howell, Michigan
    Posts
    16,181
    I am thinking now way it's the dye, just a mis-adjusted burner.

  4. #4
    Join Date
    Aug 2012
    Location
    North Dakota
    Posts
    518
    never seen brown die in fuel oil
    could be rust stains from the flashing,pipe,collar or cap

  5. #5
    Join Date
    Feb 2012
    Posts
    17
    Thanks for the replies. Attached is a close up photo. I'll try to get some from further back today when I get home. The boiler is three year old Weil Mclain with Beckett burner. They did a tune up last month so will post specs from that report also. Also - the dye used here in Northeast is red in color.
    Attached Images Attached Images  

  6. #6
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,143
    Quote Originally Posted by jff6791 View Post
    Thanks for the replies. Attached is a close up photo. I'll try to get some from further back today when I get home. The boiler is three year old Weil Mclain with Beckett burner. They did a tune up last month so will post specs from that report also. Also - the dye used here in Northeast is red in color.
    That looks like rust from the flashing to me.


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  7. #7
    Join Date
    Aug 2012
    Location
    North Dakota
    Posts
    518
    ya I know its red (not rust brown) I called this one before the pic's

  8. #8
    Join Date
    Aug 2012
    Location
    North Dakota
    Posts
    518
    the roofer (or who ever changed the stack ) sure didnt do you any favors by leaving a custom made flashing in play
    buy the way you could probly get away with liquid taring it to stop that fom proceeding to a roof leak

  9. #9
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Quote Originally Posted by mechanical'al View Post
    the roofer (or who ever changed the stack ) sure didnt do you any favors by leaving a custom made flashing in play
    buy the way you could probly get away with liquid taring it to stop that fom proceeding to a roof leak

    I'd say have the roofer come back and use heavy aluminum flashing instead of galvanized. The roofer was CHA.

  10. #10
    Join Date
    Feb 2012
    Posts
    17
    The previous photo was actually the old chimney - these pictures show the replacement. I'd agree with the flashing explanation if the stained area was confined to area down to roofline. It extends further out however suggesting a source from higher up. These are the numbers from boiler tune up a month ago:
    Weil Mclain WTGO-7
    Gross Stack Temp 460
    Net Stack Temp 400
    CO2 % 12
    Smoke 0
    Breech Draft .04
    Overfire Draft .01
    Efficiency 85%
    Nozzle 200
    Angle 60
    Spray ES
    Attached Images Attached Images   

  11. #11
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,600
    If its coming from the oil/dye, it should be on the snow also.
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  12. #12
    Join Date
    Aug 2012
    Location
    North Dakota
    Posts
    518
    its not the die why isnt it stained above the stack or on the opiste side only where water would run off downward fan out????
    was the old roof a complete tear off ???

  13. #13
    Join Date
    Feb 2012
    Posts
    17
    Quote Originally Posted by mechanical'al View Post
    its not the die why isnt it stained above the stack or on the opiste side only where water would run off downward fan out????
    was the old roof a complete tear off ???
    Yes - previous was removed. Valid point on upslope side of stack - little or no stains showing there. As far as snow - just got it a few days ago and little to none last winter - 10 inches total maybe.

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