#44 Slate Roof

Description:  Pictured here is a slate roof on a church in Ann Arbor, Michigan.  Slate roofs are considered by some to be the foremost type of roof that a building can have.  The reason is their extremely long lifetime, typically lasting numerous decades and sometimes even over a century!  Many times the failure of a slate roof is actually due to corrosion of the nails that hold the slate pieces in place and not failure of the slate pieces themselves.