Jasper County, IN Insulation Payback
Is attic insulation worth it in Jasper County, IN?
DOE classifies Jasper County as climate zone 5, cold — a real winter that drives most of the annual energy bill here. Its recommended attic R-value for bare joists is R-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 1.9 years at an estimated $1,787/year saved. Few home upgrades pay back that quickly.
Heating vs. cooling in Jasper County
Heating accounts for about $1,644/year of that and cooling about $143/year — Jasper County needs both. Nationally, Jasper County ranks in the 71th percentile for insulation savings potential. Compared only against its own climate zone, Jasper County places 322nd out of 745. Against Indiana's own average of $1,634/year, Jasper County runs 9% above that.
The climate data behind this
The heating and cooling degree days behind this estimate — 6,147 HDD and 891 CDD (base 65°F, 1991-2020 normals) — come from RENSSELAER, IN US, the nearest NOAA station with published normals, 7.1 miles from Jasper County's center. Combined heating and cooling load puts Jasper County in the 72th 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.
The smaller top-up scenario
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $261/year saved (~8.7-year payback). Whether that is worth it depends on how long you plan to stay.
Next steps for a Jasper County attic
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Jasper County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Jasper County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Jasper 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.