Cedar County, MO Insulation Payback
Cedar County, MO: what topping up your attic actually costs
DOE classifies Cedar County as climate zone 4, mixed-humid — heating load in winter and cooling load in summer, both worth taking seriously 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 $1,418 a year — payback in roughly 2.5 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Cedar County
The estimated savings split roughly $1,156/year heating, $262/year cooling. Out of every 100 US counties tracked here, Cedar County's savings potential beats roughly 47 of them. Within zone 4 specifically, it ranks 350th of 825 counties by estimated savings. Missouri averages $1,534/year across the counties tracked here; Cedar County comes in 8% lower.
Cedar County's actual weather, not a national average
NOAA's STOCKTON DAM, MO US station, 4.9 miles from Cedar County, supplies the 4,324 HDD and 1,632 CDD this estimate runs on. By total degree days, Cedar County sits at the 51th percentile nationally. Cedar 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
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 $207/year saved (~11-year payback). This one is a genuine toss-up, not a clear yes.
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 Cedar County's estimated $1,418/year on the line.
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.