2012年11月21日星期三

Welsh Slate for Roofing

Welsh slate is known not only for its fine-grained texture but also for its distinctive colouring, predominantly dark blues, blue-greys and the unmistakable Penrhyn Purple, variously known as 'Plum' or 'Heather'. Thus, more and more house host would like to take it as the material for the roofing nowadays.
Welsh Slate benefits from a number of highly practical properties making it an exceptional Roofing. It is extremely durable, unaffected by normal extremes of temperature and is highly resistant to acids, alkalis and other chemicals.  It retains its natural colour, even in UV light and is impermeable to water.Welsh roofing slates are commonly taken off roofs after 100 years (after the timbers have failed) and re-used. Penrhyn slate, for example, was removed from St Asaph Cathedral after 400 years in use and reused. The unquestioned quality and durability ensures Welsh roofing slate is much sought after for heritage and prestigious projects. The recent projects include: St Pancras Station; Kings Cross Station; Number 10 Downing Street; Buckingham Palace.
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