Greaves Welsh Slate Co Ltd - We supply natural roofing slates, wall tiles and cladding by extracting it from our own mines. Roofing tiles are available in over 24 sizes. An independent slate supplier throughout the UK & Europe. Llechwedd Welsh Slate since 1836 is our gift shop selling a range of slate products such as signs, coasters, table mats and much more. You can also design your own slate sign for your home online. All material comes from our own quarry and produced here in North Wales.