1.5.zip -

, significantly lower than standard OSB and housewrap combinations ( 3. Advantages in Construction

: A 1-inch thick layer of polyisocyanurate (polyiso) foam bonded to the back of the OSB.

Technical Analysis of 1.5-Inch ZIP System R-Sheathing in Modern Building Envelopes 1. Introduction 1.5.zip

The is a structural wood panel with integrated water-resistive barrier (WRB), air barrier, and thermal insulation. The 1.5-inch variant is a specific configuration designed to provide a continuous thermal bridge break while maintaining structural integrity in residential and commercial framing. 2. Composition and Specifications

The 1.5-inch panel is a composite material consisting of three primary layers: , significantly lower than standard OSB and housewrap

The primary benefit of the 1.5-inch ZIP-R system is the elimination of . In traditional framing, wood studs act as thermal bridges, conducting heat out of the building. The 1.5-inch ZIP-R provides continuous insulation that can cut wall heat loss by 20–30% compared to cavity-only insulation. Other advantages include:

: It combines multiple steps (sheathing, WRB, and exterior insulation) into a single installation, which can be faster and cheaper than applying separate layers. Introduction The is a structural wood panel with

: The overlay typically provides a permeance level of 12–16 perms , allowing the panels to "breathe" and dry out.