ZIP System® roof and wall sheathing offers structural panels with built-in protective overlays that eliminate the need for housewrap or felt forever. Simply install the panels, tape the seams with the specially designed ZIP SystemTM tape and you're done. You can install siding and roof covering directly on top of ZIP System roof and wall sheathing, but until you do, you'll differentiate your jobs with the high-quality curb appeal of ZIP System roof and wall sheathing.