Hernando County, FL Insulation Payback
Hernando County attic insulation, by the numbers
Hernando County sits in IECC climate zone 2 (Hot-Humid) — humid heat for much of the year, with cooling running far more than heating ever does. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. For an attic around 1,000 square feet, closing the gap from R-2 to R-49 costs around $2,820 and saves an estimated $734 a year — payback in roughly 3.8 years. Topping up the attic pays for itself here.
Where the savings come from
Split it out and it's roughly $179 a year on the heating side, $554 on cooling. By estimated insulation savings, Hernando County lands in the 3th percentile nationally. Zone 2 alone covers 233 counties in this dataset, and Hernando County comes in 204th by savings. Florida averages $743/year across the counties tracked here; Hernando County comes in 1% lower.
Where these numbers come from
The heating and cooling degree days behind this estimate — 676 HDD and 3,478 CDD (base 65°F, 1991-2020 normals) — come from WEEKI WACHEE, FL US, the nearest NOAA station with published normals, 4 miles from Hernando County's center. Combined heating and cooling load puts Hernando County in the 4th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Hernando County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
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 $99/year saved (~16.4-year payback). Call this borderline rather than a clear win.
Getting it done in Hernando County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $2,820 figure above as a planning number for Hernando County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Hernando 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.