Coleman County, TX Insulation Payback
Coleman County, TX: what topping up your attic actually costs
DOE classifies Coleman County as climate zone 3, hot-dry — scorching, dry summers where heat radiating straight through the roof does most of the damage. Its recommended attic R-value for bare joists is 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 2.8 years at an estimated $999/year saved. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $574/year heating, $426/year cooling. Out of every 100 US counties tracked here, Coleman County's savings potential beats roughly 17 of them. Within zone 3 specifically, it ranks 474th of 690 counties by estimated savings. Texas averages $1,035/year across the counties tracked here; Coleman County comes in 3% lower.
Where these numbers come from
The heating and cooling degree days behind this estimate — 2,162 HDD and 2,670 CDD (base 65°F, 1991-2020 normals) — come from COLEMAN, TX US, the nearest NOAA station with published normals, 7.8 miles from Coleman County's center. That combined heating-and-cooling load ranks Coleman County 2509th nationally by total degree days — the 21th percentile. Coleman County falls in DOE's moisture regime B (dry), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
If Coleman 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 $135/year — payback about 12 years. This one is a genuine toss-up, not a clear yes.
Getting it done in Coleman County
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $2,820 as a starting estimate for a Coleman County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Nothing here is a guess
Every figure on this page traces to DOE/IECC climate zones and NOAA degree-day normals, documented in the methodology guide. The guide to what R-value actually means explains why R-49 is the target here specifically.