Lincoln County, ME Insulation Payback
Lincoln County attic insulation, by the numbers
Lincoln County sits in IECC climate zone 6 (Cold) — a real winter that drives most of the annual energy bill here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 1.8 years at an estimated $1,948/year saved. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,892 a year on the heating side, $56 on cooling. By estimated insulation savings, Lincoln County lands in the 79th percentile nationally. Zone 6 alone covers 459 counties in this dataset, and Lincoln County comes in 429th by savings. Maine averages $2,159/year across the counties tracked here; Lincoln County comes in 10% lower.
The climate data behind this
NOAA's NEWCASTLE, ME US station, 3.6 miles from Lincoln County, supplies the 7,077 HDD and 346 CDD this estimate runs on. Combined heating and cooling load puts Lincoln County in the 78th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Lincoln County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
If the attic isn't bare
If Lincoln 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 $284/year — payback about 8 years. Call this borderline rather than a clear win.
Quotes and materials for this job
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 Lincoln County's estimated $1,948/year on the line.
Where these figures come from
Lincoln 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.