Welsh Slate is the world's leading manufacturer of high quality roofing slate, hard landscaping, architectural, aggregate and minerals slate products. Welsh Slate roofing slates have an unparalleled reputation for durability and quality. As a building product, slate satisfies a host of internal and external applications in roofing, paving, cladding, flooring, as well as landscaping products. The business is also a major supplier of aggregates for construction, decorative and industrial purposes. Natural slate is recognised throughout the world as one of the finest building materials available. The beauty of slates muted and veined hues in green, grey, red and blue is unique. Slate also has a matchless capability to withstand the most extreme environmental conditions. The Welsh slate quarries have been supplying the world with high quality roofing slate and other materials for over two hundred years. Welsh Slate's Penrhyn Quarry has been producing roofing slate since the 13th century.