I’ve added 2″ of polyiso exterior insulation on top of ZIP sheathing, which is my WRB. The windows are flashed properly with beveled shingle and ZIP stretch tape as the… I’ve added 2″ of polyiso exterior insulation on top of ZIP sheathing, which is my WRB. The windows are flashed properly with beveled shingle and ZIP stretch tape as the…Read MoreGreenBuildingAdvisor

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