Rockingham County, NC Insulation Payback
Attic insulation payback for Rockingham County, NC
Rockingham County, North Carolina 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. 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 $1,238 a year — payback in roughly 2.8 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Rockingham County
Of that, about $1,023/year comes from reduced heating and $215/year from reduced cooling load through the ceiling. Rockingham County beats 34% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Rockingham County ranks 704th. Against North Carolina's own average of $1,169/year, Rockingham County runs 6% above that.
Rockingham County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 3,825 HDD and 1,340 CDD (base 65°F, 1991-2020 normals) — come from REIDSVILLE 2 NW, NC US, the nearest NOAA station with published normals, 4.9 miles from Rockingham County's center. That combined heating-and-cooling load ranks Rockingham County 2205th nationally by total degree days — the 30th percentile. DOE also classifies Rockingham 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 Rockingham 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 $181/year — payback about 12.6 years. It is close - the payback only just fits a reasonable timeframe.
Getting it done in Rockingham 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 Rockingham 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.