ZIP System® sheathing are wood structural panels with built-in, protective overlays that eliminate the need for building wrap or roofing felt. It is code recognized in ICC-ES ESR 1474 as an alternate to the water-resistive barrier required in Chapter 14 of the IBC and Chapter 7 of the IRC and satisfies the requirements for air barriers as defined in the ICC International Energy Conservation Code. It is also code recognized in ICC-ES ESR-1473 as an alternate to roofing underlayment (felt paper) required by code when panel seams are taped with the ZIP System tape.
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