\n The Glendyne slate is an excellent quality roofing slate and is quarried in Saint-Marc-du-Lac-Long, Quebec, Canada \n The quarry was first opened in the beginning of the 20th century by Welsh quarrymen who had migrated to Canada \n Glendyne slate is a smooth, clean and attractive slate which is blue grey in colour and has a very similar appearance to slates from the Oakley quarry in Ffestiniog, North Wales \n These slates are famous throughout the world and are popular, not only in their home markets of North America, but also in Australia and throughout Europe where discerning customers appreciate a high-end roofing slate \n Glendyne slates are available in standard sizes of 20x10 (508 x 254) 20x12 (508 x 305) and 24x12 (610 x 305), come pre-holed to a 4” head-lap and come in one premium grade \n The Glendyne slates achieve the highest possible classification under the European standard BS EN 12326-1:2014 and are W1, S1 and T1 \n Glendyne slates are covered by a quarry backed 75 year guarantee \n Note Glendyne slates come in imperial dimensions and not in metric. \n