Why this exists

"Is attic insulation worth it" searches mostly turn up either a contractor's lead-capture form or a single nationwide cost range. InsulationPayback instead starts from DOE's own recommended R-value by climate zone and NOAA's actual heating and cooling degree-day data for your county, and runs the real arithmetic: what it costs to close the gap, what it saves per year, and how long that takes to pay back.

What goes into the number

Climate zones and recommended R-values come from DOE and ENERGY STAR's published guidance for the 2021 IECC. Heating and cooling degree days come from NOAA's 1991-2020 climate normals, matched to each county's nearest reporting station. Installed cost and national energy rates are sourced from published 2026 contractor-cost data and EIA rate tables. Every source is named in the methodology guide.

An estimate, honestly labeled

These are planning numbers for a typical 1,000 sq ft attic, not a quote for any specific house — actual attic size, access, and existing insulation condition change the real bill. Energy rates used are national averages (18¢/kWh electricity, $19.83/Mcf gas), not your specific utility rate, and this site says so on every page rather than implying more precision than the underlying data supports.

Written and maintained by

InsulationPayback is written by Priya Kapoor, the site's author, who researches residential energy-efficiency economics for this site — building the cost and savings model, sourcing every figure it uses, and keeping it current as DOE guidance, contractor pricing, and energy rates change. Corrections reported through the contact page are checked against the primary DOE, NOAA and EIA sources directly.

Who runs this

InsulationPayback is an independently run site. It is not affiliated with DOE, ENERGY STAR, NOAA, or any insulation contractor or retailer. Where a page includes a sponsored link or an affiliate programme, that is disclosed on the page itself and in the privacy policy.