Hendry County, FL Insulation Payback
Is attic insulation worth it in Hendry County, FL?
Hendry County sits in IECC climate zone 2 (Hot-Humid) — summers that stay hot and humid while winters barely register on the energy bill. 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 $683 a year — payback in roughly 4.1 years. That is a solid payback as home upgrades go.
Where the savings come from
Heating accounts for about $88/year of that and cooling about $595/year — Hendry County needs both. Nationally, Hendry County ranks in the 1th percentile for insulation savings potential. Compared only against its own climate zone, Hendry County places 225th out of 233. Against Florida's own average of $743/year, Hendry County runs 8% below that.
Hendry County's actual weather, not a national average
Hendry County's climate figures — 331 heating and 3,733 cooling degree days a year — are read from DEVILS GARDEN, FL US, 9.4 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Hendry County sits at the 3th percentile nationally. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $92/year saved — roughly 17.6 years to break even. Whether that is worth it depends on how long you plan to stay.
Next steps for a Hendry County attic
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 Hendry County's estimated $683/year on the line.
Hendry County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Hendry County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.