Washington County, VT Insulation Payback
Attic insulation payback for Washington County, VT
Washington County, Vermont is zone 6 under DOE's climate map (Cold), which means cold enough that heating, not cooling, is what decides the bill. An uninsulated attic there should be built 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 $2,141 a year in heating and cooling — a payback around 1.6 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Washington County
Of that, about $2,065/year comes from reduced heating and $76/year from reduced cooling load through the ceiling. Washington County beats 88% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 459 counties DOE places in zone 6, Washington County ranks 246th. Against Vermont's own average of $2,179/year, Washington County runs 2% below that.
The climate data behind this
NOAA's MONTPELIER 2, VT US station, 1.4 miles from Washington County, supplies the 7,722 HDD and 472 CDD this estimate runs on. That combined heating-and-cooling load ranks Washington County 381st nationally by total degree days — the 88th percentile. DOE also classifies Washington County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $312/year saved — roughly 7.3 years to break even. Topping up the attic pays for itself here.
Next steps for a Washington 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 Washington County's estimated $2,141/year on the line.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.