NSA Fall Conference September 28-30
Register Now

The Nature and Characteristics of Slate

Slate is a microcrystalline, fine grained metamorphic rock formed 400 million to 550 million years ago. Sediments accumulated on the sea floor were exposed to extreme pressures which lead to the chemical and mineralogical transformations you see today. Natural slate...

6 Basic Principals of Slate Roofing

Roof Slope: Generally the steeper the roof, the better with regard to service life of slate. Anything above a 8:12 is preferred, and slopes in the 12:12 to 18:12 range are probably ideal. Not only will slate shingles last longer on these steeper slopes, but they will...