Pickens County, SC Insulation Payback
Pickens County attic insulation, by the numbers
Pickens County sits in IECC climate zone 3 (Mixed-Humid) — real heating and real cooling seasons both, roughly balanced across the year. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.5 years at an estimated $1,119/year saved. Topping up the attic pays for itself fast here.
The breakdown behind the number
Split it out and it's roughly $857 a year on the heating side, $262 on cooling. By estimated insulation savings, Pickens County lands in the 26th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Pickens County comes in 213th by savings. South Carolina averages $1,016/year across the counties tracked here; Pickens County comes in 10% higher.
Pickens County's actual weather, not a national average
NOAA's PICKENS, SC US station, 0.4 miles from Pickens County, supplies the 3,229 HDD and 1,643 CDD this estimate runs on. By total degree days, Pickens County sits at the 22th percentile nationally. One local detail the R-value alone won't tell you: Pickens 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-38 needs filling, at roughly $1,620 for an estimated $151/year saved (~10.8-year payback). Call this borderline rather than a clear win.
Getting it done in Pickens 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 Pickens County's estimated $1,119/year on the line.
Where these figures come from
Pickens County's R-49 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-49 is the target here specifically.