Milam County, TX Insulation Payback
Is attic insulation worth it in Milam County, TX?
DOE classifies Milam County as climate zone 2, hot-humid — long, muggy summers and mild winters, where cooling dominates the energy bill. Its recommended attic R-value for bare joists is 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 $903 a year in heating and cooling — a payback around 3.1 years. That is a solid payback as home upgrades go.
Where the savings come from
Heating accounts for about $453/year of that and cooling about $449/year — Milam County needs both. Nationally, Milam County ranks in the 10th percentile for insulation savings potential. Compared only against its own climate zone, Milam County places 39th out of 233. Against Texas's own average of $1,035/year, Milam County runs 13% below that.
Milam County's actual weather, not a national average
NOAA's CAMERON, TX US station, 3.9 miles from Milam County, supplies the 1,709 HDD and 2,820 CDD this estimate runs on. Combined heating and cooling load puts Milam County in the 12th percentile of this 3,162-county dataset. 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.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $122/year saved — roughly 13.3 years to break even. Whether that is worth it depends on how long you plan to stay.
Quotes and materials for this job
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 Milam County's estimated $903/year on the line.
Milam County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Milam 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.