exposed duct insulation finish: protect the jacket and appearance insulation, liner, vapor barrier & condensation exposed duct insulation finish jacket visible duct wrap appearance use the specified exposed-service insulation and finish system, keeping seams straight, damage repaired, labels visible, and the final surface suitable for the occupied space. exposed work is both a thermal system and a visible finished product. architectural finish requirements, project insulation specification, manufacturer instructions this duct stays exposed-what jacket and finish standard are we turning over in this area?