Advice on insulating sheathing in climate zone 5?
Climate zone 5, western Massachusetts.
I am looking into various exterior wall systems for a two family residence and came upon the Dow Styrofoam SIS insulating sheathing:
In my climate zone with 2 x 6 framing, it is recommended that I use a minimum of 1 1/2″ rigid insulation on the building exterior for a thermal break. SIS sheathing only comes in 1/2″ and 1″ panels but satisfies both sheathing and insulation installation in one application. Is it a bad idea to use this type of sheathing in my climate zone?
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