We just bought a large log home in East TN built in 2009. I have no idea which type of log it is built with. The logs are squared on 3 sides and rounded on the 4th (or exterior). There is less than an inch gap between the logs and it looks like there is some material present between the logs (i can see through larger gaps). There are a few rooms on the inside (1st floor) that are bare wood. The upstairs is all finished with sheet rock. I have a few questions: 1. Do we seal the inside OR t