Hancock County, ME Insulation Payback
Hancock County attic insulation, by the numbers
Hancock County sits in IECC climate zone 6 (Cold) — winters that dominate the energy bill, with cooling a minor factor. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $2,081 a year in heating and cooling — a payback around 1.7 years. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $2,046 a year on the heating side, $35 on cooling. By estimated insulation savings, Hancock County lands in the 86th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Hancock County comes in 315th by savings. Maine averages $2,159/year across the counties tracked here; Hancock County comes in 4% lower.
Hancock County's actual weather, not a national average
Hancock County's climate figures — 7,651 heating and 221 cooling degree days a year — are read from E SURRY, ME US, 6.6 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Hancock County 490th nationally by total degree days — the 85th percentile. One local detail the R-value alone won't tell you: Hancock County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
If Hancock County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $304/year — payback about 7.5 years. Worth doing on the numbers alone.
Next steps for a Hancock County attic
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Hancock County's estimated $2,081/year on the line.
Where these figures come from
Hancock County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.