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 7/16" Zip System Sheathing with a 1/2" or 1" layer of rigid polyisocyanurate foam plastic insulation laminated to its interior face.