Johns Manville Fiberglass Face Polyiso Roof Decking Insulation 2" x 4' x 8' R-11.4

ValuTherm™ is a rigid roof insulation board composed of a closed cell polyisocyanurate foam core bonded during the foaming process to universal fiberglass reinforced facers. It provides high thermal insulation value and efficiency over metal, nailable, and non-nailable roof decks in built-up, modified bitumen and single ply membrane roofing systems.