Vapor barrier behind drywall (Zone 4a) – GreenBuildingAdvisor

Hi all,

I have a small finished porch that I am redoing.  The porch currently has heat but is not air conditioned – I plan to add air conditioning.  The porch was closed in over 10 years ago, but not sure exactly when.  I know there are a few spots with water entry and bug damage.

I opened up the walls and found a plastic vapor barrier on the other side of the drywall, followed by paper/foil backed fiberglass insulation and then some kind of foam insulation on the other side of the studs (not sure how thick this is).

I’ve never seen a plastic vapor barrier like this before (I’m in Virginia) and from a basic search, it seems like this will induce mold in a conditioned space.  That said, I wanted to ask if I’m missing something here.  More than anything the goal is to create a space that is not conducive to mold growth.  Would prefer not to fully re-insulate and drywall – but I will if the current setup is asking for trouble.

Thanks!