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Thread: Curious lines

  1. #1
    Join Date
    Jan 2011
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    Marietta, Georgia
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    93

    Default Curious lines

    Anyone want to try and figure out what caused these lines down the sides of the floor joists. The strange dirty lines run down each floor joist from the above joints in the diagonal subfloor. Almost looks like water caused. House sits pretty high and cannot imagine it was from a flood as there is no other evidence.

    Attachment 30024

    2018 ASHI InspectionWorld

  2. #2
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
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    5,005

    Default Re: Curious lines

    Water from wet mopping, floor washing, foot traffic resulting in dust/water stain lines. Nothing of concern.


  3. #3
    Join Date
    Mar 2007
    Location
    New Mexico
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    Default Re: Curious lines

    Could have been rain way back when the house was under construction.

    Jim Robinson
    New Mexico, USA

  4. #4
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
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    2,481

    Default Re: Curious lines

    Zombies are constantly dropping debris and body parts that get between the floorboards. Keep your eyes peeled.

    Department of Redundancy Department
    http://www.FullCircleInspect.com/

  5. #5
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
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    5,847

    Default Re: Curious lines

    My SWAG would be what Ray said. From cleaning the floor with various stuff over a period of time. Looks like a build-up of chemicals, soap, mineral salts, etc. in some areas.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  6. #6
    Join Date
    Mar 2012
    Location
    Lansdale, PA
    Posts
    876

    Default Re: Curious lines

    Quote Originally Posted by Michael Bronner View Post
    Anyone want to try and figure out what caused these lines down the sides of the floor joists. The strange dirty lines run down each floor joist from the above joints in the diagonal subfloor. Almost looks like water caused. House sits pretty high and cannot imagine it was from a flood as there is no other evidence.

    Attachment 30024
    I have seen similar staining in similar age houses. I don't know the cause, but often thought that it could be from cleaning up after plastering.


  7. #7

    Default Re: Curious lines

    What is the finish flooring above?

    Jeff Zehnder - Home Inspector, Raleigh, NC
    http://www.jjeffzehnder.com/
    http://carolinahomeinspections.com/

  8. #8
    Join Date
    Jan 2011
    Location
    Marietta, Georgia
    Posts
    93

    Default Re: Curious lines

    For those who did not ask and the one who did, floors above the photo of the stains were oak. This staining was everywhere, even where there was vinyl or tile. Not fully convinced it was from moping the wood floors with water. Would have had to been a lot of water for many years and the wood floors looked OK from atop.


  9. #9
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
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    Default Re: Curious lines

    Was this plank flooring with gaps or tongue and groove?


  10. #10
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,549

    Default Re: Curious lines

    Have they ever had a fire in the attic?
    If not, the subfloors were rained on before the roof went up. What Jim said. But that usually leaves a dark streak, not white. So a hard washing after the plaster work, yeah that must be it. I'll pick Mark's answer.

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  11. #11
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
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    Default Re: Curious lines

    Those stains on the underside of planking are from a liquid you can see the staining pattern. Dust/dirt alone would not create stains with that type of pattern.


  12. #12
    Join Date
    Jan 2011
    Location
    Guelph,Ontario
    Posts
    169

    Default Re: Curious lines

    Quote Originally Posted by Jim Robinson View Post
    Could have been rain way back when the house was under construction.
    I would agree,it was caused by rain,I have seen people build the basement and put on the floor, then live in the basement,cover with tarps guess what,leaks occurred,hence the marks.
    They are to consistant to be caused by mopping the floor or poor house keeping.


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