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NC State Extension

Air Leak – Defined

A hole, crack, or gap where air can leak in or out of a house. Air leaks can make a home feel drafty or uncomfortable and waste energy.

Air Leak

Sealing and Insulation – Resources to help you set project priorities, detect and seal air leaks, choose appropriate products, and complete Do-It-Yourself projects.

Detecting Air Leaks: Resources, videos, and helpful links

Prioritizing Air Sealing Projects: Explains where air sealing is most effective in the home and helps homeowners set priorities for air sealing projects.

Sealing Air Leaks: Tips, DIY Projects, Materials, Diagrams, Examples, and Instructional Videos

Sealing and Insulating your home is one of the most cost-effective ways to make home more comfortable and energy efficient — and you can do it yourself. Use This Guide to:

  1. Learn how to find and seal hidden attic and basement air leaks
  2. Determine if your attic insulation is adequate, and learn how to add more
  3. Make sure your improvements are done safely
  4. Reduce energy bills and help protect the environment