Lee County, AL Insulation Payback
Lee County, AL: what topping up your attic actually costs
Lee County, Alabama is zone 3 under DOE's climate map (Mixed-Humid), which means real heating and real cooling seasons both, roughly balanced across the year. An uninsulated attic there should be built up to R-49. For an attic around 1,000 square feet, closing the gap from R-2 to R-49 costs around $2,820 and saves an estimated $946 a year — payback in roughly 3 years. That's about as fast as attic paybacks get.
Heating vs. cooling in Lee County
The estimated savings split roughly $640/year heating, $305/year cooling. Out of every 100 US counties tracked here, Lee County's savings potential beats roughly 13 of them. Within zone 3 specifically, it ranks 581st of 690 counties by estimated savings. Alabama averages $1,001/year across the counties tracked here; Lee County comes in 5% lower.
The climate data behind this
Lee County's climate figures — 2,414 heating and 1,916 cooling degree days a year — are read from AUBURN NO.2, AL US, 6.5 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Lee County 2937th nationally by total degree days — the 7th percentile. Lee County falls in DOE's moisture regime A (humid), a detail that affects vapor-barrier recommendations more than the R-value target itself.
If the attic isn't bare
Already have a few inches up there? Topping R-11 up to R-38 runs about $1,620 for about $127/year saved — roughly 12.7 years to break even. 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 Lee County's estimated $946/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-49 is the target here specifically.