Hampton city, VA Insulation Payback
Hampton city attic insulation, by the numbers
Hampton city 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. 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 $1,181 a year in heating and cooling — a payback around 2.9 years. Topping up the attic pays for itself fast here.
Heating vs. cooling in Hampton city
Split it out and it's roughly $925 a year on the heating side, $256 on cooling. By estimated insulation savings, Hampton city lands in the 30th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Hampton city comes in 766th by savings. Virginia averages $1,342/year across the counties tracked here; Hampton city comes in 12% lower.
The climate data behind this
The heating and cooling degree days behind this estimate — 3,461 HDD and 1,592 CDD (base 65°F, 1991-2020 normals) — come from LANGLEY AFB, VA US, the nearest NOAA station with published normals, 3.8 miles from Hampton city's center. That combined heating-and-cooling load ranks Hampton city 2295th nationally by total degree days — the 27th percentile. One local detail the R-value alone won't tell you: Hampton city sits in moisture regime A (humid), which can affect the vapor-barrier choice.
The smaller top-up scenario
If Hampton city'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 $172/year — payback about 13.2 years. Call this borderline rather than a clear win.
Next steps for a Hampton city attic
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Hampton city, not a bid - contractors typically charge a $600 minimum regardless of job size.
Where these figures come from
Hampton city's R-60 target and its degree-day figures both come from named federal sources - see the methodology guide for exactly which ones. The guide to what R-value actually means explains why R-60 is the target here specifically.