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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.
The slates were known by names relating to their size, which were (in inches): Queens 36x7, Duchess 24x14, Countesses 20x10, Ladies 16x9 and Doubles 12x7. Small roofing slates known as scantles measuring 9x5, 8x6,7x7 and 6x3 were cut by boys.
Slate was freed from the rockface by blasting in shot holes hammered (and later drilled) into the rock. Slate mines were usually worked in chambers which followed the slate vein, connected via a series of horizontal "Floors" (or "Levels"). The chambers varied in size between mines and were divided by "pillars" or walls which supported the roof.
Wales was by now producing more than half the United Kingdom's output of slate, 26,000 tons out of a total UK production of 45,000 tons in 1793. [26] In July 1794, the government imposed a 20% tax on all slate carried coastwise, which put the Welsh producers at a disadvantage compared to inland producers who could use the canal network to ...
Collyweston stone slate is a traditional roofing material found in east-central England, primarily in Northamptonshire, Cambridgeshire, Lincolnshire, and Rutland. [ 1 ] Collyweston quarry at Duddington Collyweston roofs on the Round Church, Cambridge
Cilgwyn quarry is a slate quarry located on the north edge of the Nantlle Valley, in North Wales. It is one of the earliest slate quarries in Great Britain, having been worked as early as the 12th century. [1] [2] King Edward I of England was reputed to have stayed in a house roofed by Cilgwyn slates during his conquest of Wales. [3]
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Slate tile covers this entire structure in Germany Tile is a thin modular stone unit, commonly 12 inches (300 mm) square and 3 ⁄ 8 inch (9.5 mm) deep. Other popular sizes are 15 inches (380 mm) square, 18 inches (460 mm) square, and 24 inches (610 mm) square; these will usually be deeper than the 12-inch square.
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