Trempealeau County, WI Insulation Payback
Trempealeau County, WI: what topping up your attic actually costs
Trempealeau County sits in IECC climate zone 6 (Cold) — cold enough that heating, not cooling, is what decides the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $2,242 a year — payback in roughly 1.6 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Trempealeau County
The estimated savings split roughly $2,164/year heating, $77/year cooling. Out of every 100 US counties tracked here, Trempealeau County's savings potential beats roughly 91 of them. Within zone 6 specifically, it ranks 149th of 459 counties by estimated savings. Wisconsin averages $2,200/year across the counties tracked here; Trempealeau County comes in 2% higher.
The climate data behind this
NOAA's BLAIR, WI US station, 6.4 miles from Trempealeau County, supplies the 8,094 HDD and 482 CDD this estimate runs on. That combined heating-and-cooling load ranks Trempealeau County 270th nationally by total degree days — the 91th percentile. Trempealeau County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $327/year saved — roughly 7 years to break even. That is a solid payback as home upgrades go.
Quotes and materials for this job
Real bids depend on how easy the attic is to reach and whether old insulation needs removing first, so treat $3,480 as a starting estimate for a Trempealeau 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-60 is the target here specifically.