Where to Insulate in a Home

For energy efficiency, your home should be properly insulated from the roof down to its foundation. This includes the following areas:

• Attic spaces
  • Attic access doors to unfinished attics
  • Knee walls in finished attics
• Ducts in unconditioned spaces
• Cathedral ceilings
• Exterior walls
• Floors above unheated garages
• Foundations
  • Basements
  • Crawl spaces
  • Slab-on-grade floors.

If you're not sure where you should insulate, see our information on adding insulation to an existing home or selecting insulation for new home construction.