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Community and Q&A

Mold on Tongue-and-Groove Ceiling

HerbieG | Posted in General Questions on

I live in a log house build in 2011.   I am starting to see a black stain on my cathedral ceiling and I am concerned that it is mold.  It would be very difficult to swab the area to test.  Is it possible to have mold growing inside a log house?  I have had the outside stained 2 times since living in the home.
Thanks for any info.

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  1. GBA Editor
    Kiley Jacques | | #1

    Hi Herbie,

    Yes, mold growth on your tongue-and-groove ceiling is possible, and this Q&A thread gets at the reason why: condensation. The fix will be to determine what it is about your roof assembly that is allowing moisture to accumulate. Here is an article that will help you troubleshoot the problem: Summertime Condensation Near the Peak of a Cathedral Ceiling.

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