Welsh Penrhyn Heather Blue slate roofing tiles from Premier Slate 
The Penrhyn heather blue and the Ffestiniog blue grey Quarries are known to produce the finest roofing slate in the world, which has been 500 million years in the making. Welsh slate has the reputation to be the strongest and most durable slate known to man, every roofing slate quarry would like to compare itself with the Welsh roofing slate because of its quality, longevity and durability. Among the roofs that Welsh slate protects are: - Buckingham Palace.
- Number 10 Downing Street.
- The British Library.
- And in Sydney, the Burton street Tabernacle and many more.
Its key benefits are: - 100 year plus life.
- Colour fast and non fading.
- Ability to withstand most environmental conditions.
- Fireproof.
- Greener than most other roofing products and is totally recyclable.
Perhyn slates are commonly removed from roofs that have been laid 100 years ago, refixed once again and are good for another 50 to 75 years. 
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