Went down the rabbit hole on control layers. I’m wondering if there’s a point where being too tight, has greater risks than the benefits provided. 

For example, let’s say you got a slightly lower air blow score, in a house where all else is equal – how would that translate into energy savings/costs?

Is it better to have the ability to dry out an area that may get some moisture through the right smart vapor barriers vs being too tight where if moisture did get through it wouldn’t have a path to escape. If I’ve bungled up the details on energy efficient assemblies, by all means let me know. 

Seems like we would want to make sure we had a path to dry out to, preferably the exterior.