Speaking of Historic Slate…(weren’t we??), Peach Bottom slate, which was quarried commercially near Delta, Pennsylvania, and Cardiff, Maryland, for about 175 years, graces some of the most prestigious buildings in our region. Peach Bottom slate is coal black and very hard, with a distinctive sheen not found in other black slates. During a time when great fortunes were spent to achieve monumental elegance and beauty in architecture, Peach Bottom was considered among the best slate in the world. However, the dense solidity that makes it so durable eventually made it too costly to produce and expensive to purchase. The last roofing slates were produced in 1942, and the quarries closed in the late 1950s. Now, Peach Bottom slate can only be obtained as reclaimed slate.
Want to know more? Visit the Old Line Museum in Delta!