Grant County, WV Insulation Payback
Grant County, WV: what topping up your attic actually costs
Grant County sits in IECC climate zone 5 (Cold) — a real winter that drives most of the annual energy bill here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $1,452 a year — payback in roughly 2.4 years. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $1,282/year heating, $170/year cooling. Out of every 100 US counties tracked here, Grant County's savings potential beats roughly 50 of them. Within zone 5 specifically, it ranks 735th of 745 counties by estimated savings. West Virginia averages $1,526/year across the counties tracked here; Grant County comes in 5% lower.
Grant County's actual weather, not a national average
NOAA's PETERSBURG, WV US station, 8.1 miles from Grant County, supplies the 4,795 HDD and 1,060 CDD this estimate runs on. By total degree days, Grant County sits at the 49th percentile nationally. Grant County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $212/year saved — roughly 10.8 years to break even. This one is a genuine toss-up, not a clear yes.
Getting it done in Grant County
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 Grant County's estimated $1,452/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.