Metal is a versatile product that ca work on a residential and commercial roof. 

Pros: Longer lifespan than asphalt or wood, reflects sunlight, lightest of types
Cons: Higher cost than asphalt or wood, noise
Metal shingles—consisting of aluminum, steel, copper, or an alloy stamped into a variety of shapes—are among the most energy-efficient of all shingle types due to their ability to reflect sunlight rather than absorb it and thereby lower cooling costs. Plus, you can enjoy these savings for their long life of 50 to 75 years! Their resistance to rain, rot, wind, fire, and hail make them an apt choice for homes in the rain-battered Northwest or Southeast. It’s worth noting, though, that some of this precipitation can have other consequences for metal roofs: Hail can dent steel shingles, while rain sounds louder on a metal roof than the average roof (unless you’ve installed additional layers solid sheathing or insulation beneath these shingles for an additional cost).

Overall, metal shingles cost more than either asphalt or wood shingles, on the order of $265 to $375 per square. However, you can potentially save money using metal shingles to re-roof by installing them directly over your old, in-good-condition shingles and avoiding the costs associated with the tearing down a roof to start fresh. In addition, both the repair and replacement of individual shingles are DIY-friendly thanks to their light weight (half that of asphalt shingles) and ability to be secured to the roof with just screws.


cite: https://www.bobvila.com/articles/types-of-shingles/

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