Augusta County, VA Insulation Payback
Augusta County attic insulation, by the numbers
Augusta County sits in IECC climate zone 4 (Mixed-Humid) — a genuine mix of cold winters and humid summers, with neither one dominating the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building 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 $1,436 a year in heating and cooling — a payback around 2.4 years. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $1,293 a year on the heating side, $143 on cooling. By estimated insulation savings, Augusta County lands in the 49th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Augusta County comes in 300th by savings. Virginia averages $1,342/year across the counties tracked here; Augusta County comes in 7% higher.
The climate data behind this
The heating and cooling degree days behind this estimate — 4,834 HDD and 892 CDD (base 65°F, 1991-2020 normals) — come from STAUNTON WTP, VA US, the nearest NOAA station with published normals, 3.1 miles from Augusta County's center. That combined heating-and-cooling load ranks Augusta County 1730th nationally by total degree days — the 45th percentile. One local detail the R-value alone won't tell you: Augusta County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $209/year saved (~10.9-year payback). Call this borderline rather than a clear win.
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 Augusta County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Augusta County's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.