Foil-faced or Fiber-Faced Polyiso Exterior Insulation (Climate Zone 6)

I’ve been perusing the forum and can’t seem to find a straight answer. Located in Maine (climate zone 6). I’m looking into ordering some reclaimed polyiso foam board for exterior… I’ve been perusing the forum and can’t seem to find a straight answer. Located in Maine (climate zone 6). I’m looking into ordering some reclaimed polyiso foam board for exterior…Read MoreGreenBuildingAdvisor