Cecil County, MD Insulation Payback
Cecil County attic insulation, by the numbers
Cecil County, Maryland is zone 4 under DOE's climate map (Mixed-Humid), which means a genuine mix of cold winters and humid summers, with neither one dominating the bill. An uninsulated attic there should be built up to R-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 2.4 years at an estimated $1,426/year saved. Topping up the attic pays for itself fast here.
Where the savings come from
Split it out and it's roughly $1,228 a year on the heating side, $198 on cooling. By estimated insulation savings, Cecil County lands in the 47th percentile nationally. Zone 4 alone covers 825 counties in this dataset, and Cecil County comes in 331st by savings. Maryland averages $1,395/year across the counties tracked here; Cecil County comes in 2% higher.
Cecil County's actual weather, not a national average
Cecil County's climate figures — 4,591 heating and 1,234 cooling degree days a year — are read from NEWARK AG FARM, DE US, 12.7 miles away, NOAA's nearest 1991-2020 normals station. That combined heating-and-cooling load ranks Cecil County 1655th nationally by total degree days — the 48th percentile. One local detail the R-value alone won't tell you: Cecil County sits in moisture regime A (humid), which can affect the vapor-barrier choice.
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 $208/year saved (~11-year payback). Call this borderline rather than a clear win.
Quotes and materials for this job
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 Cecil County's estimated $1,426/year on the line.
Where these figures come from
Cecil 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.