How to Seal Attic Air Leaks

It's dusty, dirty work, but it's the quickest, cheapest way to save money on your energy bills.

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

  • Caulk gun
  • Dust mask
  • Flashlight
  • Knee pads
  • Safety glasses
  • Utility knife

You'll also need disposable coveralls, a clamp-on light, work gloves and a cap.

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • Unfaced fiberglass insulation
  • 13-gallon plastic garbage bags
  • Reflective foil insulation
  • Acrylic latex caulk
  • High temperature silicone caulk
  • 14-in. wide aluminum flashing
  • Expanding spray foam insulation (use the type rated as fireblock)
  • Foam weatherstrip
  • CO2 detectors