King and Queen County, VA Insulation Payback
King and Queen County, VA: what topping up your attic actually costs
King and Queen 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. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,216 a year — payback in roughly 2.9 years. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $965/year heating, $251/year cooling. Out of every 100 US counties tracked here, King and Queen County's savings potential beats roughly 32 of them. Within zone 4 specifically, it ranks 730th of 825 counties by estimated savings. Virginia averages $1,342/year across the counties tracked here; King and Queen County comes in 9% lower.
The climate data behind this
NOAA's WALKERTON 2 NW, VA US station, 7.6 miles from King and Queen County, supplies the 3,610 HDD and 1,563 CDD this estimate runs on. That combined heating-and-cooling load ranks King and Queen County 2200th nationally by total degree days — the 30th percentile. King and Queen 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 $177/year saved — roughly 12.9 years to break even. This one is a genuine toss-up, not a clear yes.
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 and Queen County's estimated $1,216/year on the line.
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.