Scott County, VA Insulation Payback
Attic insulation payback for Scott County, VA
Scott County, Virginia is zone 4 under DOE's climate map (Mixed-Humid), which means real heating and real cooling seasons both, roughly balanced across the year. 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 $1,265 a year in heating and cooling — a payback around 2.8 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,063/year comes from reduced heating and $202/year from reduced cooling load through the ceiling. Scott County beats 36% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Scott County ranks 652nd. Against Virginia's own average of $1,342/year, Scott County runs 6% below that.
The climate data behind this
The heating and cooling degree days behind this estimate — 3,976 HDD and 1,257 CDD (base 65°F, 1991-2020 normals) — come from KINGSPORT, TN US, the nearest NOAA station with published normals, 14.2 miles from Scott County's center. Combined heating and cooling load puts Scott County in the 32th percentile of this 3,162-county dataset. DOE also classifies Scott County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
If Scott 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 $185/year — payback about 12.4 years. It is close - the payback only just fits a reasonable timeframe.
Getting it done in Scott County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Scott County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.