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Is Adding Attic Insulation Really Worth It? | Results from a Real House

We had insulation added to our upstairs attic in Fall 2021, and I thought it would be worthwhile to see what kind of difference it made in terms of our heating bill. Previously, the attic had (maybe) R-28 total, and we had 4"-5" of blown-in cellulose added to bring the total up to around R-46 to R-50. Using thermostat data from our ecobee from the previous winter and comparing to this past winter, I can get an idea of how much more efficient heating the house is. According to This Old House (https://www.thisoldhouse.com/insulati..., adding insulation to the attic, crawlspace, and around basement rim joists can save up to 15% on heating and cooling costs. I investigate how realistic this number is. 🙏 If you want to support what I do, please consider buying through my Amazon Affiliates link: https://amzn.to/2JFKjeQ ------------------------------------ Follow me on: 🌐 Website: https://www.glennfrazee.com/ 📷 Instagram:   / glenn.frazee   🔨 Instructables: https://www.instructables.com/member/...