Coos County, NH Insulation Payback
Is attic insulation worth it in Coos County, NH?
Coos County, New Hampshire is zone 6 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 $2,372 a year — payback in roughly 1.5 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $2,341/year of that and cooling about $31/year — Coos County needs both. Nationally, Coos County ranks in the 95th percentile for insulation savings potential. Compared only against its own climate zone, Coos County places 48th out of 459. Against New Hampshire's own average of $2,071/year, Coos County runs 15% above that.
The climate data behind this
Coos County's climate figures — 8,755 heating and 195 cooling degree days a year — are read from BERLIN MUNI AP, NH US, 7.6 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Coos County 175th nationally by total degree days — the 94th 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?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $346/year saved — roughly 6.6 years to break even. The math clears comfortably within a normal ownership horizon.
Next steps for a Coos County attic
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 Coos County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Coos County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Coos 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.