Moisture Considerations with Exterior Board Insulation
We started construction on a home in Atlanta designed using Zip R6 sheathing. Contrary to what our supplier promised months ago that sheathing is not available in the Southeast. A possible change we can make is to use regular Zip sheathing and 1″ exterior foam or Comfortboard 80 mineral wool (also hard to find in the area). Assuming the Zip siding is installed and taped properly are there any vapor barrier/moisture considerations with either the foam or Rockwool. Either choice will be covered by a 3/4″ air gap and wood siding.
Thank you for your insight.
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