Henry County, VA Insulation Payback
Henry County, VA: what topping up your attic actually costs
Henry 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 $1,335 a year in heating and cooling — a payback around 2.6 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Henry County
The estimated savings split roughly $1,161/year heating, $174/year cooling. Out of every 100 US counties tracked here, Henry County's savings potential beats roughly 41 of them. Within zone 4 specifically, it ranks 515th of 825 counties by estimated savings. Virginia averages $1,342/year across the counties tracked here; Henry County comes in 1% lower.
The climate data behind this
Henry County's climate figures — 4,342 heating and 1,085 cooling degree days a year — are read from MARTINSVILLE FLTR PLT, VA US, 8.6 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Henry County sits at the 38th percentile nationally. Henry 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?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $195/year saved — roughly 11.7 years to break even. This one is a genuine toss-up, not a clear yes.
Getting it done in Henry County
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Henry County job, not a quote. Expect at least a $600 minimum charge from most contractors.
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.