Moreover, metal roofs are known for their durability and longevity. When properly installed, a metal roof can last anywhere from 40 to 70 years, far outpacing the lifespan of asphalt shingles, which typically last between 15 to 30 years. By installing a metal roof over asphalt shingles, homeowners can effectively extend the life of their roofing system, reducing the frequency of future replacements and the associated costs. This is especially advantageous in regions prone to extreme weather, where the resilience of a metal roof can protect against harsh conditions such as heavy rain, snow, and wind.