I’m currently in the process of installing insualtion, vapor retarder, and drywall in my new home in zone 6.
I detailed the foam sheathing meticulously, taping all seams on the exterior as well as interior surfaces, and caulking at the interior perimeter of all the stud bays.
My build is a timberframe with exterior insulation frame, and although I’d like to seal the vapor retarder, it’s pretty tricky to do it well due to the nature of the build. I’ve been slowly chugging along sealing as best I can, but it’s obvious that the best effort will still have leaks.

My question is, if it’s still advantageous to continue trying to seal the retarder, or given the quality of sealing the exterior, and poor seal at the retarder if it’s not worth it.

Thanks, Daniel