Lafayette County, WI Insulation Payback
Lafayette County, WI: what topping up your attic actually costs
Lafayette 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. 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 1.7 years at an estimated $2,066/year saved. That's about as fast as attic paybacks get.
The breakdown behind the number
The estimated savings split roughly $1,974/year heating, $92/year cooling. Out of every 100 US counties tracked here, Lafayette County's savings potential beats roughly 85 of them. Within zone 6 specifically, it ranks 330th of 459 counties by estimated savings. Wisconsin averages $2,200/year across the counties tracked here; Lafayette County comes in 6% lower.
Where these numbers come from
Lafayette County's climate figures — 7,384 heating and 570 cooling degree days a year — are read from DARLINGTON WWTP, WI US, 2 miles away, NOAA's nearest 1991-2020 normals station. By total degree days, Lafayette County sits at the 85th percentile nationally. Lafayette County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $301/year saved — roughly 7.6 years to break even. That is a solid payback as home upgrades go.
Next steps for a Lafayette 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 Lafayette County, not a bid - contractors typically charge a $600 minimum regardless of job size.
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.