Haywood County, TN Insulation Payback
Haywood County attic insulation, by the numbers
Haywood County sits in IECC climate zone 3 (Mixed-Humid) — a genuine mix of cold winters and humid summers, with neither one dominating the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-49. Going from R-2 to the recommended R-49 costs roughly $2,820 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.3 years at an estimated $1,213/year saved. Topping up the attic pays for itself fast here.
Heating vs. cooling in Haywood County
Split it out and it's roughly $902 a year on the heating side, $312 on cooling. By estimated insulation savings, Haywood County lands in the 32th percentile nationally. Zone 3 alone covers 690 counties in this dataset, and Haywood County comes in 82nd by savings. Tennessee averages $1,258/year across the counties tracked here; Haywood County comes in 4% lower.
Haywood County's actual weather, not a national average
Haywood County's climate figures — 3,399 heating and 1,955 cooling degree days a year — are read from BROWNSVILLE, TN US, 1.4 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Haywood County in the 36th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Haywood County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
A shallower starting point changes the math: with R-11 already down, only the gap to R-38 needs filling, at roughly $1,620 for an estimated $163/year saved (~9.9-year payback). Call this borderline rather than a clear win.
Getting it done in Haywood County
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $2,820 figure above as a planning number for Haywood County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Haywood County's R-49 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-49 is the target here specifically.