Guides

• How InsulationPayback Estimates Your County's Payback — The exact DOE, NOAA and cost sources behind every county's recommended R-value, savings estimate and payback period, named and sourced.
• What Attic R-Value Means, and Why It Changes by Climate — Why DOE recommends a different attic R-value for every climate zone, and what R-value your existing insulation depth probably already has.
• Attic Insulation: DIY or Hire a Contractor? — What a homeowner can realistically do themselves versus what actually needs a contractor, and the real cost difference.
• State Energy Rebates for Insulation (2026 Update) — The federal insulation tax credit expired in 2025 — what's still available through state-level IRA rebate programs, and how to check your state.