The FyreWrap Elite 1.5 Duct Insulation consists of a single-layer system applied directly on to the duct surface.  Only encapsulated blanket should be utilized to ensure the outer surface of the insulation is protected.  The insulation system may be installed at zero clearence to combustibles at all locations on the wrap, at material overlaps, and in the field between overlaps.  Install insulation with a 3" minimum overlap on all joints.  Seal all cut edges with aluminum foil tape.