Black water-like stains interior of log home

Observed these stains on the interior of a log home in N. Florida - area was dry at time of inspection and nothing popped on thermal - the exterior areas appeared to be well sealed and no obvious deficiencies were observed at the exterior.

It almost appears to be water/liquid that was driven through the logs? Or is it some type of tar like/caulking substance?

If anyone has ever seen anything like this or has any ideas - please let me know!

Any help is appreciated

Thanks




Log cabin has water stains on interior walls - Misc. Discussion - InterNACHI®️ Forum

Log Cabin Question - Misc. Discussion - InterNACHI®️ Forum

How about a pic of the exterior so we can see how it was constructed?
There are many different methods of “Log Home” construction.

Most likely leaking around the window?

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