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.
|Value||ASTM Test Method||ASTM Grade|
|Modulus of Rupture||611 lbs. at 0.253 in||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