Yes, spiral ductwork often needs to be insulated to enhance its thermal efficiency and prevent energy loss. Insulating spiral ducts helps maintain the desired temperature of the air being transported, reducing the workload on HVAC systems and lowering energy bills. Additionally, insulation helps prevent condensation, which can lead to moisture damage and mold growth. In both residential and commercial settings, proper insulation of spiral ductwork ensures optimal performance, energy savings, and a comfortable indoor environment.