Brunswick County, VA Insulation Payback
Brunswick County, VA: what topping up your attic actually costs
Brunswick County sits in IECC climate zone 4 (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-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.8 years at an estimated $1,243/year saved. That's about as fast as attic paybacks get.
Heating vs. cooling in Brunswick County
The estimated savings split roughly $1,007/year heating, $236/year cooling. Out of every 100 US counties tracked here, Brunswick County's savings potential beats roughly 34 of them. Within zone 4 specifically, it ranks 700th of 825 counties by estimated savings. Virginia averages $1,342/year across the counties tracked here; Brunswick County comes in 7% lower.
The climate data behind this
The heating and cooling degree days behind this estimate — 3,767 HDD and 1,468 CDD (base 65°F, 1991-2020 normals) — come from LAWRENCEVILLE 3 E, VA US, the nearest NOAA station with published normals, 3.8 miles from Brunswick County's center. That combined heating-and-cooling load ranks Brunswick County 2145th nationally by total degree days — the 32th percentile. Brunswick County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
If Brunswick 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. 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 Brunswick 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.