About InsulPro
InsulPro exists because "add more insulation" is a slogan, and bag counts are arithmetic.
The attic is usually the cheapest insulation upgrade in the house, and the math is unusually public: R-value per inch is published by every manufacturer, coverage maps are on every bag, and climate-zone targets are set by code. Yet most quotes arrive as a single number with no math attached.
Our calculators show the whole chain — what R-value your current depth delivers, what your climate zone targets, how many bags or batts the gap requires, and what the upgrade saves per heating season. Every assumption is editable.
We are educators, not contractors, and nothing here sells installation. The tools exist so the next quote can be checked against arithmetic.
What makes InsulPro different
- Your numbers never leave your browser. Every calculator on InsulPro runs entirely on your device. We never see, store, or transmit the figures you enter — there are no accounts and no server-side processing of your inputs.
- Published methodology. Each calculator page explains the exact formula it uses and the assumptions behind it, so you can check our work or reproduce it in a spreadsheet.
- Free, forever, without a paywall. InsulPro is supported by advertising. There is no premium tier, no email gate, and no upsell.
Independence
InsulPro is an independent educational project. We are not affiliated with, endorsed by, or acting on behalf of any government agency, lender, insurer, or the organizations whose formulas and public data we reference (such as DOE and ICC climate-zone guidance). All trademarks and referenced standards belong to their respective owners.
Questions, corrections, or suggestions are genuinely welcome — get in touch.