Roanoke County, VA Insulation Payback
Is attic insulation worth it in Roanoke County, VA?
Roanoke County, Virginia is zone 4 under DOE's climate map (Mixed-Humid), which means heating load in winter and cooling load in summer, both worth taking seriously here. 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 $1,254 a year — payback in roughly 2.8 years. Few home upgrades pay back that quickly.
Where the savings come from
Heating accounts for about $1,035/year of that and cooling about $220/year — Roanoke County needs both. Nationally, Roanoke County ranks in the 35th percentile for insulation savings potential. Compared only against its own climate zone, Roanoke County places 674th out of 825. Against Virginia's own average of $1,342/year, Roanoke County runs 7% below that.
The climate data behind this
NOAA's ROANOKE RGNL AP, VA US station, 12 miles from Roanoke County, supplies the 3,869 HDD and 1,368 CDD this estimate runs on. That combined heating-and-cooling load ranks Roanoke County 2140th nationally by total degree days — the 32th 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.
If the attic isn't bare
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 $183/year saved (~12.5-year payback). Whether that is worth it depends on how long you plan to stay.
Getting it done in Roanoke 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 Roanoke County's estimated $1,254/year on the line.
Roanoke County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Roanoke 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.