Sealing Duct Work

Publication Type:
Fact Sheet

Published / Updated:

Leaks in the duct system waste both energy and money. By eliminating leakage in the ducts, your home's heating and cooling system can provide comfort with a decreased run-time. This will not only improve efficiency and lower your energy costs, but also help air quality. By applying Mastic, a gray paste-like substance containing fiber, to every duct seam, you can stop leaks. Download this fact sheet to learn more about duct sealing and improving energy efficiency in your home.

  • applying Mastic
  • insulating ducts in unheated areas
  • blower door test

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