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Quarrix Composite Tiles are made from a blend of high-density polyethylene (HDPE), fly ash, and other polymers. Their weight is about one-third that of concrete and clay tiles: 305 pounds per square, or roughly the same as the heaviest asphalt shingles. They come in six colors and can be cut with a standard circular saw. (Carbide blades work best.) Prices start around $425 per square. Hip/ridge rakes, hip starters, and metal closures are available in matching colors.

Quarrix Building Products, 800/438-2920, quarrix.com.