Shingle roof systems are installed on steep slope applications.  Shingles are available in various materials, colors, and profiles.  The most popular are dimensional or architectural asphalt shingles.  Other shingle roofing materials include slate, synthetic slate, clay tile, and cedar shake, which are more expensive but provide a unique and enhanced appearance to the building.  Roof shingles are almost always highly visible and are an essential aspect of a building's aesthetics in patterns, textures, and colors.