Wall assembly according to Dr. Joe Lstiburek.
As stated by JL on this site back in May:
“For a custom home for a rich client – or for me if I every got really rich my air barrier would be exterior plywood sheathing with a liquid applied mesh reinforced water barrier providing continuity at joints and windows. Over that would go insulating sheathing, furring and a back vented and drained cladding (cedar siding in my case). In the cavities would go high density spray foam. Done.”
I like this idea even plywood has no way to dry if it will somehow ( but how ?) wet.
What about slight variation, from outside: cedar, rainscreen, 1′ polyiso, grace ice and water, zip panel or advantec, foam, drywall, latex paint? Certainly not production grade solution but for DIY with a lot of time and money saved on labor to be spend on better materials.
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