Preserving the vapor profile of an old Maine Cabin – GreenBuildingAdvisor

A I have a little bit of a conundrum here in climate zone 6. I live in a log cabin that was built as a kit in the 80s. There is NO insulation just 6 inch logs and tongue and groove paneling attached to the flat interior face of the logs.  I’ve been wanting to rip of the paneling add some continuous insulation to the interior log faces, strapping, and then drywall. Its very important that I maintain the walls ability to dry in both directions since the logs do take on some moisture etc. A couple of questions have come up:

What type of insulation and at what thickness should I get to maintain a breathable/ durable wall?

  Can the strapping screwed through 3 inches or more of insulation properly hold the weight of drywall?

How do I attached a smart vapor membrane to the comfortboard if there are no studs? Do I tack it to the strapping?

 

I was also thinking of trying out product like this GPS

https://www.progressivefoam.com/product/halfbackh20/

However I was concerned that at 3 inches or more it would limit the walls ability to dry to the interior. Thanks!