Slate

Penrhyn® Welsh Slate Roofing

Penrhyn® Heather Blue slate, also known as Bangor Blue and Penrhyn® Purple, is produced from a fine-grained slate deposit, laid down over 500 million years ago in the Cambrian period.

Penrhyn® Quarry in the heart of Snowdonia is one of the largest slate quarries in the world, and has been in commercial production for over seven centuries. The properties of the Penrhyn® slate allow it to be split into thin sheets but still retain its strength and unparalleled durability.

Penrhyn® slate comes in three thickness grades to suit your projects specific roofing needs.

Which grade of Penrhyn® Welsh Slate do you need?

Penrhyn® Welsh Slate roofing is available in three thickness grades: Capital, County, and Celtic. The thickness of the three specific grades is to suite the range of different roofing project requirements.

The quality of the stone will allow production of roofing slates in excess of 1 metre in length, but the majority of the production is focused on the core production sizes (500 x 300 mm, 400 x 250 mm and 300 x 200 mm) in three thickness grades; Capital (5.5 mm), County (7 mm), and Celtic (9mm). Each grade of slate has a subtly differing character, but all have the intrinsic quality that makes Penrhyn® Slate the envy of the slate world.

If you need help in understaning the precise benefits or which grade of Welsh Slate roofing will provide your roofing project with the best solution, then please call us - we'll be happy to explain more.

Penrhyn® Capital

Capital Grade is the thinnest production of Penrhyn® Welsh Slate at 5.5 mm.

Only limited parts of our quarries will make this slate with its fine-grained riven surface. The thinness of the slate gives a flat uniform finish to the roof and was traditionally the material transported to the more distant markets such as continental Europe and even as far away as Australia and New Zealand.

Penrhyn® County

County Grade is the main production thickness at Penrhyn® Welsh Slate at 7 mm thick.

The surface texture is similar to the Capital Grade, but the slightly thicker leading edge gives more focus to the slate on the roof. Traditionally sold in the Midlands and North West of England it is now sold widely across the World.

Penrhyn® Celtic

Celtic Grade is the thickest of Penrhyn® Welsh Slates production at 9 mm.

As its name suggests its natural home is on the roofs of buildings facing the prevailing westerly winds in Ireland, Scotland and Wales. The more textured surface and thicker leading edge give the slate a more rural appeal but the Celtic Grade slate does find its way into city centres where it can be used to make a statement: There is no doubt that this is a natural slate roof.


Why Choose Penrhyn® Welsh Slate for your roof?

All Welsh Slate used in roofing is the very best quality, which is why it's guaranteed for 100 years and has a much greater life expectancy. So why choose Penrhyn® Welsh Slate?

Typically, if it comes to a choice between Cwt-y-Bugail and Penrhyn® slate, it boils down to the distinctive aesthetic qualities of the Penrhyn® slates. Their sumptuous heather tones and natural green markings create a beautiful roof which is capable of complimenting ultra modern and heritage architecture alike. The unique colours of Penrhyn® Welsh Slate, with its natural variations, combined with a performance measured in centuries is why it adorns building roofs across the world.

 

Penrhyn® Welsh Slate Roofing Key Facts

Penrhyn® Welsh Slate has been gracing the roofs of the world for centuries, however modern building regulations require quality standards which go beyond a performance measured in centuries.

Penrhyn® Welsh Slate...

  • holds the independent accreditation British Standard Kitemark and the Belgian ATG approval
  • absorbs less than 0.3% of water
  • has a high resistance to acid and alkali that helps keep its natural colour even in Ultra Violate light
  • it is non-combustible
  • it is compatible with all other building materials

 

 

 

 

Sales Office
Penrhyn Quarry
Bethesda
Bangor
Gwynedd
LL57 4YG

+44 (0) 1248 600656
enquiries@welshslate.com

Download this Roofing Brochure for a Comprehensive Guide to the Technical Requirements and Standards

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