The largest slate quarry in North America.
A unique high quality slate
At Glendyne we look to the future with confidence, which is why no obstacle is too significant to prevent us from thinking big!
We are actively engaged in our mission to mine responsibly the largest slate quarry in North America in order to provide you with the best possible quality slate. Our innovative techniques allow us to make the most of our slate quarry and minimize by-products. We also make our commitments a core priority in order to create strong business relationships.