, significantly lower than standard OSB and housewrap combinations ( 3. Advantages in Construction
: When properly taped, ZIP walls can achieve air change rates of 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 , significantly lower than standard OSB and housewrap
The 1.5-inch panel is a composite material consisting of three primary layers: Application and Code Compliance : A 1-inch thick
: In Climate Zone 5, the R-6.6 provided by the 1.5-inch panel is sufficient to keep the sheathing boundary above the dew point, preventing internal condensation when using fiber insulation in the stud cavity. 4. Application and Code Compliance
: A 1-inch thick layer of polyisocyanurate (polyiso) foam bonded to the back of the OSB.
: The overlay typically provides a permeance level of 12–16 perms , allowing the panels to "breathe" and dry out.