Metal roofs, as evidenced by their 50-year lifespan, outlive asphalt shingles by more than three times their lifetime. While asphalt shingles are easier to install than metal roofing, they require regular maintenance and will need to be replaced in 15 to 30 years, which means an added cost to homeowners.
The term Modern era, Modern period, or Modern Times is used by historians to loosely describe the period of time immediately following what is known as the early modern period. It is to be distinguished from the term of Modernity. 1. The early modern period lasted from the end of the 15th century to the middle of the 18th century, circa 1450 (moveable type printing press etc) and 1492 (start of European Colonialism) to 1750 (the Enlightenment) and the beginning of the Industrial Revolution. 2.
The Progressive Era was a time period in American history lasting from the 1890s through the 1920s. At the turn of the century, America was experiencing rapid urbanization and industrialization. Waves of immigrants were arriving, many from southeastern Europe.he Progressive Era was a time period in American history lasting from the 1890s through the 1920s. At the turn of the century, America was experiencing rapid urbanization and industrialization. Waves of immigrants were arriving, many from southeastern Europe.