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The 1.5-inch variant is often the minimum thickness required in the ZIP-R product line to satisfy energy codes in colder climates. However, designers must account for specific regional requirements: Roxul Comfortboard - disadvantages? - GreenBuildingAdvisor

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

The 1.5-inch panel is a composite material consisting of three primary layers: 1.5.zip

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

: When properly taped, ZIP walls can achieve air change rates of Introduction The 1

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

: A factory-applied water-resistive and air barrier on the exterior face. Key Performance Metrics: R-Value : Provides a thermal resistance of R-6.6 . Key Performance Metrics: R-Value : Provides a thermal

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: