Vermont Black and Gray/Black
Vermont Black and Gray/Black slate is a medium to heavy texture stone with a medium to dark gray color and darker, linear markings. This slate is separated into the darker (Vermont Black) and lighter (Gray/Black) to provide the desired depth of color. While this slate does not weather into a multicolor roof, you may get some bronzing in the lighter parts of the slate over time.
ASTM Tests
| Value | ASTM Test Method | ASTM Grade | |
|---|---|---|---|
| Modulus of Rupture | 611 lbs. at 0.253 in | C-120-06 | S1 |
| Absorption | 0.163% | C-120-06 | S1 |
| Weather Resistance | .0019 in. | C-217-94 | S1 |
All Vermont Slate Company® roofing products meet or exceed ASTM C-406 S1 Standards
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