You’ve heard slate referred to as “historical roofing,” but that doesn’t mean it’s simply old. Slate truly has an interesting history: What is Slate? Slate is a layered, fine-grained rock originating from shale-type sedimentary rock made of volcanic ash or clay. The layering formed from fine-grained clay that was compressed over time. Natural slate can … Continue reading The What And How Of Slate Roofing