Benefits

  • Penrhyn Welsh slate comes in an attractive and distinctive blue / purple heather tones with natural green markings
  • Thin, flat and uniform with a fine grained riven surface
  • Penrhyn slate proudly conforms and surpasses all the top UK tests for water absorption, thermal cycle resistance and sulphur dioxide (acid rain) exposure with an excellent W1-S1-T1 rating
  • Having been put through the most stringent selection process, Penrhyn slate is tested to the British UKCA requirements
  • Full UK guarantee of up to 75 years for the Penrhyn slate.  All our natural slate products come with a guarantee and declaration of performance.

Sizes Available (mm):

500mm x 300mm

455mm x 250mm

400mm x 250mm

300mm x 200mm

UKCE Mark

Technical Advice

This slate is available in 3 different grades Capital (thickness 5.5mm), County (thickness 7mm) and Celtic (thickness 9mm).  Your ISS representative will advise slate sizes and thickness best suited to your project.

A Declaration of Performance (DOP) and full testing results can be provided upon request.