Updated for 2025IECC / DOE Data

Stop Heating the Outdoors.

Most US homes are under-insulated. Check your attic against 2025 DOE standards in less than 30 seconds.

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Frequently Asked Questions

Everything you need to know about attic efficiency.

What is 'R-Value' and why does it matter?
R-Value measures how well insulation resists heat flow. The higher the R-Value, the better the insulation power. If your R-Value is too low, heat escapes in winter and enters in summer, forcing your HVAC system to work overtime.
How do I know my current insulation type?
Look into your attic. If it looks like pink/yellow cotton candy, it's likely Fiberglass. If it looks like grey shredded paper, it's Cellulose. If it looks like expanding foam, it's Spray Foam. Measure the depth in inches to calculate your current R-Value.
How much money can I actually save?
According to the EPA's Energy Star program, homeowners can save an average of 15% on heating and cooling costs (or roughly 11% on total energy costs) by air sealing their homes and adding insulation in attics, floors over crawl spaces, and basements.
What is the difference between 'New Code' and 'Retrofit Target'?
'New Code' (IECC 2021) is the strict standard required for newly built homes. 'Retrofit Target' is the recommendation for existing homes, balancing energy efficiency with the practical constraints of adding insulation to older structures.