Some may call copper an ancient material, but architects, installers and specifiers are finding it hard to argue with its adaptability, sustainability and longevity. Mankind’s oldest metal has protected the roofs of cathedrals, state buildings, libraries and homes all over the world for centuries. When properly installed, a copper roof can last more than 100 years. However, long-term performance can be compromised if the roofing system is not designed or installed correctly. Recently, the Copper Development Association (CDA) recognized architects and contractors for their restoration work to rectify such design failures on buildings in the U.S. and Canada.