Dow Thermax Sheathing Polyisocyanurate Insulation is a non-structural, rigid board insulation consisting of a glass-fiber-reinforced polyisocyanurate foam core laminated between 1 mil smooth, reflective aluminum foil facers. Install Dow Thermax Sheathing in a range of applications including new frame wall construction behind masonry, siding, exterior stucco or other compatible finishes. It may be installed exposed to the interior without a thermal barrier in many applications. Because of its improved fire performance, this sheathing insulation is appropriate for hourly rated assemblies.
Dow Thermax Sheathing is available in many sizes,thicknesses and densities. For more information please research the Dupont website and let us know what product will work best for your job.