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. The engineered wood panel on the outside of the system provides a nailable, easy-to-flash base for cladding, trim and windows. When properly installed and taped, ZIP System R-Sheathing provides a water-resistive barrier, air barrier and exterior insulation all in one product.