Gray/Black, Strata Gray or Mottled Gray/Black is all produced in Vermont and New York. This slate has a medium gray undertone with black or dark gray stripes. A percentage of these slates will take on some buff, brown and tan tones over time.
North Country Semi-Weathering Gray/Black (frequently referred to as Strata Gray) is a visually dynamic slate prized for its bold textures and evolving character. Produced by select Vermont quarries, it offers a sophisticated “living” finish that matures gracefully alongside the architecture it protects.
Aesthetic Color & Profile:
This variety is defined by its striking linear patterns, making it one of the most recognizable and sought-after slates in the industry.
- Primary Palette: A rich medium-to-dark gray base.
- Distinctive Markings: Characterized by bold black “stripes” and linear inclusions that run across the surface of the slate.
- Semi-Weathering Transition: While the dark gray background remains stable, a percentage of the slates will transition over time into warm, natural tones of buff, tan, and bronze.
Technical Specifications
Despite its changing colors, the physical integrity of this Vermont stone remains rock-solid for generations.
- ASTM S-1 Rating: Consistently achieves the highest industry grade for natural stone quality.
- Low Water Absorption: Exceptional density prevents moisture from penetrating the shingle, ensuring long-term structural stability.
- Environmental Resilience: Specifically engineered by nature to withstand harsh acid rain and intense freeze-thaw cycles without degradation.
Why Choose Semi-Weathering Gray/Black?
By selecting North Country Semi-Weathering Gray/Black, you are investing in a high-performance roofing system that combines the rugged reliability of Vermont stone with a unique, shifting aesthetic that only gets better with time.
FAQs
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Where does Gray/Black roofing slate come from?
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Do slate roofs need to be installed with an underlayment?
Underlayment is required by most local building codes. Traditionally asphalt saturated organic felts help protect the roof until all the slate is installed. It is best to check with the International Building Code (IBC) on what is required.
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Are slate roofs expensive?
When you amortize the cost of a slate roof over its life expectancy of 75 + years it will be the least expensive roofing investment you will ever make! The material cost of a natural slate roof can be as low as $5-$6 / sq. ft. (USD)
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Where are slate roofs popular?
Slate roofs can be found all over the world. Extensively used throughout Europe for centuries and in North America dating back to the mid 18 th century when Welsh and Irish immigrants arrived with quarrying and installation knowledge. Checkout our Projects in Your Area page https://www.ncslate.com/projects/projects-in-your-area/ for more info.