which rigid insulation to use for exterior roof sheathing

We’re building an unvented roof with rigid insulation on the outside and fiberglass batts on the inside.Would this board be appropriate to use?  We’re in zone 3 so code only… We’re building an unvented roof with rigid insulation on the outside and fiberglass batts on the inside.Would this board be appropriate to use?  We’re in zone 3 so code only…Read MoreGreenBuildingAdvisor