Calvert County Roof Types and Ages
Calvert has the oldest median housing of the three Southern Maryland counties we serve, and very little new construction.
- 1990Median year built across Calvert County
- 41%Of county homes built from 1980 to 1999
- 32%Of county homes built before 1980
- 10%Of county homes built in 2010 or later
Asphalt shingles are on more than 80 percent of American homes, lasting about 20 years as three-tab and 30 as architectural, with metal at 40 to 80. When roughly seven in ten homes in a county were built before 2000, most have already replaced a roof or will soon need to, and Bay-side exposure only shortens the clock.
Sources: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates; InterNACHI life expectancy chart; Asphalt Roofing Manufacturers Association.