Elevate Enverge™ CI Glass and Enverge™ CI Foil Exterior Wall Insulation are fire-resistant, rigid insulation panels that consist of a specially formulated closed-cell polyisocyanurate foam core laminated to high performance facers. Enverge CI Glass and Foil provide outstanding thermal performance in commercial wall applications to provide continuous insulation (ci) within the building envelope. With the proper detailing, Enverge CI Foil can be part of the air, and water resistant barriers, as well as the vapor retarder in the exterior wall.