King George County, VA Insulation Payback
Attic insulation payback for King George County, VA
King George County, Virginia is zone 4 under DOE's climate map (Mixed-Humid), which means heating load in winter and cooling load in summer, both worth taking seriously here. 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 $1,349 a year in heating and cooling — a payback around 2.6 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in King George County
Of that, about $1,148/year comes from reduced heating and $201/year from reduced cooling load through the ceiling. King George County beats 42% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, King George County ranks 487th. Against Virginia's own average of $1,342/year, King George County runs 1% above that.
The climate data behind this
NOAA's CORBIN, VA US station, 12.6 miles from King George County, supplies the 4,295 HDD and 1,252 CDD this estimate runs on. By total degree days, King George County sits at the 41th percentile nationally. DOE also classifies King George County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
If the attic isn't bare
If King George 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 $197/year — payback about 11.6 years. It is close - the payback only just fits a reasonable timeframe.
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 King George County's estimated $1,349/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.