For our upcoming build, I am considering exterior mineral wool basement insulation (Iowa Zone 5).  I’ve read as many articles here as I was able to find on insulation in general and basement insulation in particular, and think I understand the pros/cons of exterior vs interior.  The reason for thinking exterior is to have bare concrete on the interior to keep an eye on cracks and moisture and mold.  Also, we would like to avoid interior rigid mineral foam because of chemical sensitivity issues — concerns about rigid foam are raised, for example, in this NRDC report: https:// s3.amazonaws.eom/hbnweb.dev/uploads/files/Qj5q/NRDC- 3o84%2oGuide%20to%2oHealthier%2oRetrof it_Final.pdf

If using mineral wool as exterior basement insulation:

1. Does moist air in the interior of the basement still have to be kept away from reaching the interior of the concrete walls?  If so, wouldn’t this  necessitate interior impermeable insulation despite the exterior insulation?

2.  Would wood studs attached to the interior of the concrete (eg for wiring) still be at risk from contact with possibly damp concrete?  If so, then again wouldn’t that necessitate  interior impermeable insulation despite the exterior insulation?

Lastly, does anyone have experience with/information about foamglas interior insulation for a basement?  Last I read it was discontinued for residential, but it has been recommended as an inert alternative to interior rigid foam.

Thanks in advance for any information/advice!