Westmoreland County, PA Insulation Payback
Attic insulation payback for Westmoreland County, PA
Westmoreland County sits in IECC climate zone 5 (Cold) — a real winter that drives most of the annual energy bill here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to 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 $1,660 a year in heating and cooling — a payback around 2.1 years. Hard to find a home improvement with a faster payback than this.
The breakdown behind the number
Of that, about $1,566/year comes from reduced heating and $94/year from reduced cooling load through the ceiling. Westmoreland County beats 63% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 745 counties DOE places in zone 5, Westmoreland County ranks 556th. Against Pennsylvania's own average of $1,724/year, Westmoreland County runs 4% below that.
Westmoreland County's actual weather, not a national average
The heating and cooling degree days behind this estimate — 5,855 HDD and 587 CDD (base 65°F, 1991-2020 normals) — come from MT PLEASANT, PA US, the nearest NOAA station with published normals, 6.8 miles from Westmoreland County's center. Combined heating and cooling load puts Westmoreland County in the 61th percentile of this 3,162-county dataset. DOE also classifies Westmoreland County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
If Westmoreland County's attic already has 3-4 inches of old insulation (about R-11) rather than bare joists, the recommended target drops to R-49. That smaller top-up costs around $2,280 and saves an estimated $242/year — payback about 9.4 years. It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
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 Westmoreland County job, not a quote. Expect at least a $600 minimum charge from most contractors.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.