Crosby County, TX Insulation Payback
Is attic insulation worth it in Crosby County, TX?
Crosby County, Texas is zone 3 under DOE's climate map (Hot-Dry), which means intense summer heat with low humidity, where attic radiant heat gain is the main driver. An uninsulated attic there should be built 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 $1,193 a year — payback in roughly 2.4 years.
Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $907/year of that and cooling about $286/year — Crosby County needs both. Nationally, Crosby County ranks in the 30th percentile for insulation savings potential. Compared only against its own climate zone, Crosby County places 106th out of 690. Against Texas's own average of $1,035/year, Crosby County runs 15% above that.
The climate data behind this
Crosby County's climate figures — 3,417 heating and 1,796 cooling degree days a year — are read from Crosbyton, TX US, 4.3 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Crosby County 2172nd nationally by total degree days — the 32nd percentile. Its moisture regime is classified dry, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
If the attic isn't bare
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 $161/year saved (~10.1-year payback). Whether that is worth it depends on how long you plan to stay.
Getting it done in Crosby County
Get quotes from at least two local contractors 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 checking upfront given Crosby County's estimated $1,193/year on the line.
Crosby County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Crosby 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.