As well as some leaking knots, we also have some large cracks in some logs called “shakes” that go deep enough into the logs to cause leaks with strong wind and rain. Here the shake is allowing water to get in behind the window architrave, so we have drilled it and used a syringe with expanding glue like we did for the knots to attempt to seal up the shake close to the window.
Once the glue is set the wooden pegs we drive into the drill holes are shaved off.
For any poor log home enthusiast who needs to know, this is the glue we are using.