Vermillion County, IN Insulation Payback
Attic insulation payback for Vermillion County, IN
DOE classifies Vermillion 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. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,654 a year — payback in roughly 2.1 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Vermillion County
Of that, about $1,507/year comes from reduced heating and $147/year from reduced cooling load through the ceiling. Vermillion County beats 63% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Vermillion County ranks 565th. Against Indiana's own average of $1,634/year, Vermillion County runs 1% above that.
The climate data behind this
Vermillion County's climate figures — 5,635 heating and 917 cooling degree days a year — are read from ROCKVILLE, IN US, 14.1 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Vermillion County 1184th nationally by total degree days — the 63th percentile. DOE also classifies Vermillion County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
If Vermillion County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $241/year — payback about 9.5 years. It is close - the payback only just fits a reasonable timeframe.
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 Vermillion County's estimated $1,654/year on the line.
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.