Patrick County, VA Insulation Payback
Patrick County, VA: what topping up your attic actually costs
Patrick County, Virginia 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. 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 $1,287 a year in heating and cooling — a payback around 2.7 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Patrick County
The estimated savings split roughly $1,127/year heating, $160/year cooling. Out of every 100 US counties tracked here, Patrick County's savings potential beats roughly 37 of them. Within zone 4 specifically, it ranks 612th of 825 counties by estimated savings. Virginia averages $1,342/year across the counties tracked here; Patrick County comes in 4% lower.
Patrick County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 4,216 HDD and 997 CDD (base 65°F, 1991-2020 normals) — come from STUART, VA US, the nearest NOAA station with published normals, 2.8 miles from Patrick County's center. That combined heating-and-cooling load ranks Patrick County 2164th nationally by total degree days — the 32th percentile. Patrick County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
The smaller top-up scenario
If Patrick 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 $188/year — payback about 12.1 years. This one is a genuine toss-up, not a clear yes.
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 Patrick County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-60 is the target here specifically.