Vermont Semi-Weathering Black
In the first few months after installation, this slate variety darkens and some faint brown tones may come through. (You can see a few light-colored slates on one of the houses pictured; this is stone dust that washed off after the first heavy rain.) Lifespan is 100+ years before deterioration begins.
NOTE: Slate is a natural product, quarried directly from the earth. Some variation is a normal occurrence