Clay County, WV Insulation Payback
Attic insulation payback for Clay County, WV
DOE classifies Clay County as climate zone 4, mixed-humid — heating load in winter and cooling load in summer, both worth taking seriously here. Its recommended attic R-value for bare joists is 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 $1,431 a year — payback in roughly 2.4 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,260/year comes from reduced heating and $171/year from reduced cooling load through the ceiling. Clay County beats 48% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Clay County ranks 317th. Against West Virginia's own average of $1,526/year, Clay County runs 6% below that.
Where these numbers come from
Clay County's climate figures — 4,714 heating and 1,064 cooling degree days a year — are read from CLENDENIN, WV US, 14.6 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Clay County 1683rd nationally by total degree days — the 47th percentile. DOE also classifies Clay 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
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $209/year saved — roughly 10.9 years to break even. It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
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 Clay 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.