Slate

Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock.
Slate roofs have been around for centuries and have proven to be a great roofing medium. Although slate roofs are not as popular as they once were, their appearance is timeless (Figure 1). Older homes and churches that date back to the late 1800’s have remained watertight with their original slate roofs intact.
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Copper

Metal roofing can consist of a high percentage of recycled material and is 100% recyclable.  It does not get as hot as asphalt, a common roofing material, and it reflects heat away from the building underneath in summertime.

Copper specifically has played a significant role in architecture for thousands of years.

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Asphalt Shingles

An asphalt shingle is a type of wall or roof shingle. They are one of the most widely used roofing covers in North America because they have a relatively inexpensive up-front cost and are fairly simple to install.
Asphalt shingle roofs offer a much better variety of looks in comparison to the other materials. Whether it’s superb colors and beautiful styles you’re looking for, or unparalleled durability and performance, the bottom line is you simply won’t find all these features in a single material… unless it’s asphalt.
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