Publication Type:
Fact Sheet

Published / Updated:

The average duct system loses 12% or more of conditioned air due to leaks and poorly connected ducts. By properly sealing ducts, you can reduce energy loss and lower your energy costs. Visually inspecting ducts can reveal small cracks and openings that can be fixed using Mastic to fill in the openings. However, because many ducts are hidden in walls and floors, it may be necessary to seek a professional contractor to perform repairs to the duct system. Download this fact sheet to learn more about properly sealing the duct system in your home.

  • finding duct leaks
  • applying Mastic
  • consider duct insulation
  • duct sealing DIY

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