Either layer can be any of the typical sheathing materials as well as custom materials from the Material Library.
You can use Zip Sheathing on Layer 2 and insulation on Layer 1 as shown:
*Cladding layer turned off for visibility.
** Each sheathing layer is set to "LAP" at the corners.
You can use Zip Sheathing on Layer 2 and insulation on Layer 1 as shown:
*Cladding layer turned off for visibility.
** Each sheathing layer is set to "LAP" at the corners.