This may not be as old as this forum is used to but it seemed like it could be a good fit.

I purchased a Post and Beam home as my first house and the house was built in 1990. The building company is not around anymore.

The house has vertical shiplap siding that is peeling in areas and is starting to provide areas where moisture can come in and damage the sheathing. In certain areas some of the sheathing is already rotting. I believe the sheathing is OSB board and insulation panels that were attached to the outside of the house. If I was to replace the siding, which I want to do unless there is a better option, then will I be able to replace certain sheets of OSB board without replacing the entire panel? I do not want to blindly remove the siding and then realize the project as twice as big and as expensive as I realized.

Thanks for the help.