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: It combines multiple steps (sheathing, WRB, and exterior insulation) into a single installation, which can be faster and cheaper than applying separate layers.

: The overlay typically provides a permeance level of 12–16 perms , allowing the panels to "breathe" and dry out. 1.5.zip

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 : It combines multiple steps (sheathing, WRB, and