Delaware County, OH Insulation Payback
Is attic insulation worth it in Delaware County, OH?
Delaware County, Ohio is zone 5 under DOE's climate map (Cold), which means winters that dominate the energy bill, with cooling a minor factor. An uninsulated attic there should be built 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 $1,542 a year — payback in roughly 2.3 years. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $1,366/year of that and cooling about $176/year — Delaware County needs both. Nationally, Delaware County ranks in the 56th percentile for insulation savings potential. Compared only against its own climate zone, Delaware County places 700th out of 745. Against Ohio's own average of $1,669/year, Delaware County runs 8% below that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 5,108 HDD and 1,096 CDD (base 65°F, 1991-2020 normals) — come from WESTERVILLE, OH US, the nearest NOAA station with published normals, 11 miles from Delaware County's center. Combined heating and cooling load puts Delaware County in the 56th percentile of this 3,162-county dataset. 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.
The smaller top-up scenario
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $225/year saved — roughly 10.1 years to break even. Whether that is worth it depends on how long you plan to stay.
Next steps for a Delaware County attic
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 Delaware County's estimated $1,542/year on the line.
Delaware County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Delaware 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.