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We have a tongue and groove log sided house. The interior walls are tongue and groove also. I have noticed black "blobs" about 1 foot wide on an interior wall. Could this be mold? And where would it be coming from? The only thing I can figure is that there are a few wood bee holes on the outside, but they are probably 6 feet away from the black spots. How would I treat this?


If it is mold you will have to sand and restain if possible. If it is Carpenter Bees, they will travel several feet down the walls in any direction. They could have built a nest and it could be leaking through the wood.

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