Henry County, AL Insulation Payback
Henry County, AL: what topping up your attic actually costs
Henry County sits in IECC climate zone 3 (Hot-Humid) — long, muggy summers and mild winters, where cooling dominates the energy bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-49 runs an estimated $2,820, and saves about $883 a year in heating and cooling — a payback around 3.2 years. The math clears comfortably within a normal ownership horizon.
Heating vs. cooling in Henry County
The estimated savings split roughly $482/year heating, $401/year cooling. Out of every 100 US counties tracked here, Henry County's savings potential beats roughly 9 of them. Within zone 3 specifically, it ranks 655th of 690 counties by estimated savings. Alabama averages $1,001/year across the counties tracked here; Henry County comes in 12% lower.
Where these numbers come from
Henry County's climate figures — 1,818 heating and 2,517 cooling degree days a year — are read from HEADLAND, AL US, 12.2 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Henry County in the 7th percentile of this 3,162-county dataset. Henry 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 Henry County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-38. That smaller top-up costs around $1,620 and saves an estimated $119/year — payback about 13.6 years. This one is a genuine toss-up, not a clear yes.
Getting it done in Henry 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 Henry County's estimated $883/year on the line.
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-49 is the target here specifically.