Franklin County, VT Insulation Payback
Franklin County, VT: what topping up your attic actually costs
DOE classifies Franklin County as climate zone 6, cold — cold enough that heating, not cooling, is what decides the bill. Its recommended attic R-value for bare joists is 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 $2,250 a year in heating and cooling — a payback around 1.5 years. That's about as fast as attic paybacks get.
Where the savings come from
The estimated savings split roughly $2,197/year heating, $54/year cooling. Out of every 100 US counties tracked here, Franklin County's savings potential beats roughly 92 of them. Within zone 6 specifically, it ranks 140th of 459 counties by estimated savings. Vermont averages $2,179/year across the counties tracked here; Franklin County comes in 3% higher.
Franklin County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 8,216 HDD and 334 CDD (base 65°F, 1991-2020 normals) — come from ENOSBURG FALLS 2, VT US, the nearest NOAA station with published normals, 5.9 miles from Franklin County's center. That combined heating-and-cooling load ranks Franklin County 275th nationally by total degree days — the 91th percentile. Franklin County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $328/year saved — roughly 6.9 years to break even. That is a solid payback as home upgrades go.
Next steps for a Franklin County attic
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Franklin County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-60 is the target here specifically.