Jefferson County, PA Insulation Payback
Jefferson County attic insulation, by the numbers
DOE classifies Jefferson County as climate zone 5, cold — winters that dominate the energy bill, with cooling a minor factor. Its recommended attic R-value for bare joists is R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $1,851 a year in heating and cooling — a payback around 1.9 years.
Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,784 a year on the heating side, $66 on cooling. By estimated insulation savings, Jefferson County lands in the 75th percentile nationally. Zone 5 alone covers 754 counties in this dataset, and Jefferson County comes in 206th by savings. Pennsylvania averages $1,724/year across the counties tracked here; Jefferson County comes in 7% higher.
Where these numbers come from
NOAA's Dubois Jefferson CO AP, PA US station, 6.5 miles from Jefferson County, supplies the 6,673 HDD and 413 CDD this estimate runs on. Combined heating and cooling load puts Jefferson County in the 73rd percentile of this 3,171-county dataset. One local detail the R-value alone won't tell you: Jefferson County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
Already have some insulation?
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 $270/year saved (~8.4-year payback). Call this borderline rather than a clear win.
Getting it done in Jefferson County
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 Jefferson County job, not a quote. You should get more than one quote before signing anything - expect at least a $600 minimum charge from most contractors.
Where these figures come from
Jefferson County's R-60 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-60 is the target here specifically.