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Roofing slates 
Summary
Roofing slates are roofing tiles made out of slate. The rock is split into thin sheets which are cut to the requires size before shipment. This contrasts to slabs which are milled to produce larger structural components.[1] They are the primary product of the slate industry.
History edit
The Romans were the first to mine and install standard-sized slate on roofs.[2]
In his writings, Pliny the Elder mentions the existence of slate in Liguria, near Genoa.
Modern production edit
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]
See also edit
References edit
- ^ Structural Slate: Uses and Standardized Types. Structural Slate Company. 1927.
- ^ Cárdenes, Víctor (11 October 2022). "Natural slate in the Roman Empire".
- ^ Cárdenes, Victor; Rubio-Ordóñez, Álvaro; Wichert, Jörn; Cnudde, Jean Pierre; Cnudde, Veerle (2014-11-01). "Petrography of roofing slates". Earth-Science Reviews. 138: 435–453. Bibcode:2014ESRv..138..435C. doi:10.1016/j.earscirev.2014.07.003. ISSN 0012-8252.