Giles County, VA Insulation Payback
Giles County attic insulation, by the numbers
Giles 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. 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 $1,470 a year — payback in roughly 2.4 years. Topping up the attic pays for itself fast here.
Heating vs. cooling in Giles County
Split it out and it's roughly $1,369 a year on the heating side, $102 on cooling. By estimated insulation savings, Giles County lands in the 51th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Giles County comes in 235th by savings. Virginia averages $1,342/year across the counties tracked here; Giles County comes in 10% higher.
Where these numbers come from
Giles County's climate figures — 5,119 heating and 632 cooling degree days a year — are read from PEARISBURG 4 SSE, VA US, 2.8 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Giles County in the 46th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Giles County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
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 $214/year saved (~10.6-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 Giles County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Giles 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.