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An important use of Spanish slate is as a roofing material, often being specified by building professionals as a result of its aesthetic appearance and durability characteristics. Slate is particularly suitable as a roofing material as it has an extremely low water absorption index of less than 0.4%.
The world's biggest consumer of slate is France, followed by the UK, USA and Germany. In 2012, Spain produced more than 580,000 tonnes (570,000 long tons; 640,000 short tons) of slate worth about $380 million. This made it the largest slate producer in the world, followed by China and Brazil. [3]
The Slatington Slate Trade report for January 4 of 1880 showed that quarries in the town of Slatington alone had shipped 81,402 squares of roofing slates (over 8 million square feet) as well as 40,486 cases of school slates and 243 cases of blackboards.
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Slate is incredibly durable and can last several hundred years, [20] often with little or no maintenance. [18] Natural slate is also fire resistant and energy efficient. [21] Slate roof tiles are usually fixed (fastened) either with nails or with hooks (as is common with Spanish slate). [22]
The Collyweston Slater pub in Collyweston with a Collyweston slate roof. Collyweston stone slate is a traditional roofing material found in east-central England. [1] Collyweston quarry at Duddington Collyweston roofs on the Round Church, Cambridge. It is not a proper slate but a limestone found in narrow beds. It is considerably heavier than ...