ZIP System R-sheathing is the simple all-in-one structural panel with built-in exterior insulation. Featuring integrated moisture, air and thermal protection, ZIP System R-sheathing completely reimagines traditional wall assemblies by streamlining exterior water, air and thermal management. ZIP System R-Sheathing is an insulated sheathing that combines 2-7/16" ZIP System Sheathing with a 1/2" or 1" layer of rigid polyisocyanurate foam plastic insulation laminated to its interior face.