The lifespan of a new roof largely depends on the material used. On average, an Architectural Asphalt Shingle roof can last anywhere from 25 to 30 years, while a Designer Asphalt Shingle roof may offer a lifespan of 40 years or more. Metal roofs can last up to 50 years, and solar roofs, although a newer technology, are designed to last for several decades. Regular maintenance and prompt repair of any damage can also help to extend the lifespan of your roof.