Carpet staining
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Thread: Carpet staining

  1. #1
    Join Date
    Apr 2005
    Posts
    1

    Question

    Hopefully someone out there has heard of this before... I have a customer who has light colored carpet in her home, and for some reason on the second floor there are black marks all along the walls. Two local carpet companies have said that it is caused by "an hvac system imbalance"; in other words, a positive or negative pressure on the house causing infiltration or the opposite. I find this hard to believe, because there are no marks on the carpet downstairs, and normal dust, be it from infiltration or other, is not black. Does anyone know what is happening here?

  2. #2
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    induct line coming loose
    cheap carpet
    oil burner with cracked heat exchanger
    dirty as hell filter
    dirt in the ductwork
    and cheap paint

  3. #3
    Join Date
    Aug 2003
    Location
    Lincoln, Nebraska
    Posts
    1,051
    Are they burning candles. This will cause the black marks for sure.
    Its a good Life!

  4. #4
    Join Date
    May 2002
    Location
    Colorado
    Posts
    697
    Exterior, interior, or all walls?

  5. #5
    Join Date
    Nov 2002
    Location
    emerald city, sc
    Posts
    1,469
    Originally posted by m kilgore
    Are they burning candles. This will cause the black marks for sure.
    we have a bingo. look at the electrical outlets, are there dark streaks going up from them?

    try this link
    http://www.homeenergy.org/archive/he...98/980109.html
    i wanted to put a picture here

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