Camden County, NJ Insulation Payback
Is attic insulation worth it in Camden County, NJ?
Camden County sits in IECC climate zone 4 (Mixed-Humid) — heating load in winter and cooling load in summer, both worth taking seriously here. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-60. For an attic around 1,000 square feet, closing the gap from R-2 to R-60 costs around $3,480 and saves an estimated $1,473 a year — payback in roughly 2.4 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,286/year of that and cooling about $188/year — Camden County needs both. Nationally, Camden County ranks in the 51th percentile for insulation savings potential. Compared only against its own climate zone, Camden County places 223rd out of 825. Against New Jersey's own average of $1,541/year, Camden County runs 4% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 4,809 HDD and 1,168 CDD (base 65°F, 1991-2020 normals) — come from GLASSBORO 2 NE, NJ US, the nearest NOAA station with published normals, 8.5 miles from Camden County's center. That combined heating-and-cooling load ranks Camden County 1543rd nationally by total degree days — the 51th percentile. Its moisture regime is classified humid, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
Already have some insulation?
If Camden 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 $215/year — payback about 10.6 years. Whether that is worth it depends on how long you plan to stay.
Getting it done in Camden County
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 Camden County's estimated $1,473/year on the line.
Camden County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Camden County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.