Wise County, TX Insulation Payback
Attic insulation payback for Wise County, TX
Wise County, Texas is zone 3 under DOE's climate map (Mixed-Humid), which means real heating and real cooling seasons both, roughly balanced across the year. An uninsulated attic there should be built up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.6 years at an estimated $1,079/year saved. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $672/year comes from reduced heating and $407/year from reduced cooling load through the ceiling. Wise County beats 23% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 690 counties DOE places in zone 3, Wise County ranks 290th. Against Texas's own average of $1,035/year, Wise County runs 4% above that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,534 HDD and 2,551 CDD (base 65°F, 1991-2020 normals) — come from DECATUR, TX US, the nearest NOAA station with published normals, 2 miles from Wise County's center. That combined heating-and-cooling load ranks Wise County 2271st nationally by total degree days — the 28th percentile. DOE also classifies Wise County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
The smaller top-up scenario
If Wise 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 $145/year — payback about 11.1 years. It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
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 Wise County, not a bid - contractors typically charge a $600 minimum regardless of job size.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.