These gray slabs have been protecting roofs for centuries—we take an in-depth look at slate.

The historic Cloisters gets cleaned, waterproofed and re-engineered by Walter B. Melvin Architects, LLC, of New York City.

Two churches, one in Ohio and one in Missouri, opted for synthetic slate roofing, citing its appearance and sustainability, as well as cost and weight savings.

Slate Roofs has long been the essential go-to guide for determining material quantities, roof layout, specification data and construction details.