Dauphin County, PA Insulation Payback
Attic insulation payback for Dauphin County, PA
Dauphin County, Pennsylvania is zone 5 under DOE's climate map (Cold), which means cold enough that heating, not cooling, is what decides the bill. An uninsulated attic there should be built 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 $1,670 a year in heating and cooling — a payback around 2.1 years.
Hard to find a home improvement with a faster payback than this.
Where the savings come from
Of that, about $1,567/year comes from reduced heating and $103/year from reduced cooling load through the ceiling. Dauphin County beats 64% of the counties in this 3,171-county dataset on estimated insulation savings. Among the 754 counties DOE places in zone 5, Dauphin County ranks 541st. Against Pennsylvania's own average of $1,724/year, Dauphin County runs 3% below that.
The climate data behind this
NOAA's Dehart DAM, PA US station, 4.1 miles from Dauphin County, supplies the 5,861 HDD and 642 CDD this estimate runs on. Combined heating and cooling load puts Dauphin County in the 62nd percentile of this 3,171-county dataset. DOE also classifies Dauphin County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
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 $244/year saved (~9.4-year payback). It is close - the payback only just fits a reasonable timeframe.
Next steps for a Dauphin County attic
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first, so treat the $3,480 figure above as a planning number for Dauphin County, not a bid. Worth getting quotes from at least two local contractors before committing - most charge a $600 minimum regardless of job size.
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.