I recently purchased a log home in Northern Ontario. It is ~10” hand-hewn, square pine logs and was built in 1980.
At some point in its history a deck was added all the way around the front (4 sides of octagonal home). The ledger board was nailed directly to the logs and I began to suspect that the trapped moisture/debris had caused rot.
Tonight I started removing the deck and in the first 20′ section have dug out a rotted area approx. 5′ long, 6” deep and 2-5” high.