Quality Assurance

Welsh Slate manufactures under an accredited Quality Assurance Scheme which complies with BS EN ISO 9001:2015. Roofing products are also kite-marked to BS EN 12326-1:2014.

All products, aggregates and minerals created from the 500 million years old slate combine the unique aesthetic and technical qualities of this natural stone.

As the world's leading manufacturer of high-quality slate for a range of interior and exterior applications, Welsh Slate is committed to producing all its products to the highest quality standards.

In addition, the company maintains appropriate accreditation for its wide variety of markets served.


Cert No. 14622





Sales Office
Penrhyn Quarry
LL57 4YG

+44 (0) 1248 600656