Slate Roof
Roofing slate has a long history of use since the eighth century because of its durability and architectural adaptability. High-grade slate has a service life in excess of 100 years. In addition, roofing slate is a dense and thin layer of natural stone that is fire-resistant, durable and has low water absorption. (Source: Proceedings of the Fourth International Symposium on Roofing Technology and National State Association)