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  1. #1

    Default Mold or extractive staining

    The attic I looked at a couple of days ago had a board roof sheathing; built in 1972. The roof sheathing on the north side showed 'darkening' (see photos)No mold spores or gross mold conditions.
    Question: I flagged at as possible mold (likely embedded in the wood) but could this just be extractive staining due to condensation on the roof sheathing? I think a mold mitigation (common around here anytime sees a whiff of mold) is probably a waste of money. But I don't want my client to have a problem with later, when reselling, and for me, its CYA.
    Any thoughts after looking at the pictures.
    Ernie Simpson

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  2. #2

    Default Re: Mold or extractive staining

    Date of photos: I never reset the date after I change the batteries. Phots from this week. Got to update dates.
    E.S.


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

    Default Re: Mold or extractive staining

    Quote Originally Posted by Ernie Simpson View Post
    The attic I looked at a couple of days ago had a board roof sheathing; built in 1972. The roof sheathing on the north side showed 'darkening' (see photos)No mold spores or gross mold conditions.
    Question: I flagged at as possible mold (likely embedded in the wood) but could this just be extractive staining due to condensation on the roof sheathing? I think a mold mitigation (common around here anytime sees a whiff of mold) is probably a waste of money. But I don't want my client to have a problem with later, when reselling, and for me, its CYA.
    Any thoughts after looking at the pictures.
    Ernie Simpson
    .
    Most of what I see of the discolored framing members and decking is caused by Pine Sap Leaching.
    .

    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
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: Mold or extractive staining

    Quote Originally Posted by Ernie Simpson View Post
    Any thoughts after looking at the pictures.
    That looks like moisture stain. That's what I would call it. Just a guess from those pics. There are plenty of indications of roof leaks, so hopefully the roof cover has been repaired?
    All that wet insulation, if there was insulation, would give off water vapour when the attic warms up, and that would condense on the sheathing, staining the wood.
    The other issue is lack of ventilation, but we have no info on that here. Good luck.

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

  5. #5
    Join Date
    Aug 2007
    Location
    Memphis TN.
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    4,311

    Default Re: Mold or extractive staining

    Quote Originally Posted by John Kogel View Post
    .
    That looks like moisture stain.
    .
    Not This One.
    * note exterior is Darker with no Discoloration in the Crack.
    .

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    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.

  6. #6

    Default Re: Mold or extractive staining

    Thanks all. In regard to questions: the roof (shingles) were fairly new. The home had spaced soffit vents and gable vents. No ridge vent (but recommended). Am telling client most likely not an embedded mold in the wood.
    E. Simpson


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