Kent County, MD Insulation Payback
Kent County attic insulation, by the numbers
Kent County, Maryland 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 $1,422 a year — payback in roughly 2.4 years. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,216 a year on the heating side, $206 on cooling. By estimated insulation savings, Kent County lands in the 47th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Kent County comes in 340th by savings. Maryland averages $1,395/year across the counties tracked here; Kent County comes in 2% higher.
Where these numbers come from
Kent County's climate figures — 4,546 heating and 1,284 cooling degree days a year — are read from CHESTERTOWN, MD US, 4.3 miles away, NOAA's nearest 1991-2020 normals station. Combined heating and cooling load puts Kent County in the 48th percentile of this 3,162-county dataset. One local detail the R-value alone won't tell you: Kent County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
If the attic isn't bare
If Kent 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 $207/year — payback about 11 years. Call this borderline rather than a clear win.
Getting it done in Kent County
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 Kent County job, not a quote. Expect at least a $600 minimum charge from most contractors.
Where these figures come from
Kent County'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.