Tips on How to Insulate Your Basement

Efficiency Vermont experts are here to help, with professional tips on air sealing and insulating your basement. Locate common problem areas, and learn how to seal them. Then check out the different types of insulation that can work in a basement.

Most homes in Vermont can save an average of $375 a year by properly air sealing and adding insulation. You’ll also stay more comfortable, year-round.

  • 00:25: Prepping your workspace and safety concerns
  • 00:57: First things first – Air Sealing
  • 01:08: Air sealing a bulkhead door
  • 01:36: Insulating a bulkhead door 
  • 02:12: Air sealing and insulating basement windows
  • 02:45: Air sealing smaller holes like sill or rim joist seams, penetrations for water, fuel, or electric lines
  • 03:06: Insulating band joists
  • 03:30: Insulating basement walls
  • 04:04: Find a certified contractor 


Materials checklist:

  • Silicone, acrylic latex caulk and/or low-expansion foam for air sealing
  • High-temperature (heat-resistant) caulk for sealing around flues and chimneys
  • Appropriate board insulation products depending on project


Stuck, and not sure what to do next? Contact our help line for trouble-shooting support at 888-921-5990.

While some air sealing work can be done on your own, we recommend working with a Building Performance Institute (BPI) contractor to air seal your entire home and reduce your bills as much as possible. They can also account for air quality and address other safety concerns.

Find a qualified contractor near you

For more information:

  1. A printable how to guide
  2. ENERGY STAR® Do-It-Yourself Guide