What are roofs in California made of?

In California, roofs are commonly made from a variety of materials, including asphalt shingles, clay or concrete tiles, and metal. Asphalt shingles are popular due to their affordability and ease of installation, while clay and concrete tiles are favored for their durability and aesthetic appeal, particularly in Mediterranean-style architecture. Metal roofs are also gaining popularity for their longevity and energy efficiency. Additionally, some homeowners opt for eco-friendly materials like green roofs or solar panels.