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Insulation in Delmar: July highs average about 88°F; January lows average about 27°F; the typical home was built around 1979 (51% before 1980).
In Wicomico County, July highs average about 88°F and January lows about 27°F, with roughly 46 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, flash floods and floods in Wicomico County, with hail up to 1 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in Wicomico County was built around 1979, about 47 years ago, and 51% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
Wicomico County has had 10 federal disaster declarations in the last 25 years, most often for hurricanes; the latest was Severe Winter Storm (2026).
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Uneven rooms, high bills and an attic you can see the joists in are the signs; older homes often have far too little.
Attic insulation and air-sealing usually pay back fastest.
These are Wicomico County figures — more about homes in Salisbury.
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