Outstanding Natural Slate Material
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North Country Semi-Weathering Gray/Green (Sea Green) Slate

North Country Semi-Weathering  Gray/Green (Sea Green) Slate

North Country Semi-Weathering Gray/Green is a visually dynamic roofing slate prized for its organic evolution and enduring performance. Sourced from prestigious Vermont quarries, this slate offers an understated elegance that matures into a warm, historic patina over time.

Aesthetic Color & Profile

The defining characteristic of this variety is its color palette, which transitions gracefully as it interacts with the elements.

  • Initial Tones: A serene base of sea-green and cool gray hues.
  • The Weathering Process: After exposure, a percentage of the slates will transition to develop a rich, organic patina of buff, tan, and browns.
  • Design Versatility: Often used as the foundational “base color” for multi-colored slate blends, it provides a natural transition between more vibrant accent colors.
  • Tailored Options: Available in standard sizes and a range of thicknesses to meet specific architectural requirements.

Technical Excellence & Durability

Despite its shifting colors, the structural integrity of this Vermont stone is permanent and uncompromising.

  • ASTM S-1 Rating: Consistently meets or exceeds the highest industry standards for natural stone.
  • 100-Year Service Life: When installed correctly, these shingles have been known to provide a century of protection with minimal maintenance required.
  • Inherent Resilience: Naturally resistant to fire, pollutants, and extreme weather cycles, ensuring a dense, non-porous shield for your structure.

Why Specify Semi-Weathering Gray/Green?

North Country Slate provides quality-assured samples to architects, contractors, and homeowners to demonstrate the superior texture and color of our Gray/Green shingles.

Partner with the Experts

Ready to explore the possibilities? Our experienced technical sales representatives are available to provide custom quotes and guide you through the endless design options North Country Slate has to offer.

FAQs

  • Why is it called Semi-Weathering Gray/Green?

    Roofing slate is a natural product which is quarried. A range of colors is to be expected. Depending on where they are in the quarry, the slate might appear more gray than green and vice versa. A percentage of these slates will eventually weather to tones of buff and brown once exposed to the elements. This weathering process can take a few months to a few years.

  • How is Semi-Weathering Gray/Green slate affected by weathering?

    Roofing slate “weathering” or some say “fading” is due to the minerals that make up the color of the slates. The calcite and iron compounds in the slate, which when exposed to the elements will change a percentage of slates to shades of brown. It should be noted, “weathering” does not affect the performance and longevity of a slate roof. Our North Country Semi-Weathering Gray/Green is an ASTM S-1 roofing slate; thus, it will have a service life of over 75 years.

  • Is Semi-Weathering Gray/Green the same as “Sea Green” roofing slate?

    The answer is yes! Some may call it “Vermont Sea Green” while others call it “Semi-Weathering Gray/Green”. When originally quarried, the slate will be a light gray / green. However, over time some slates may weather due to the oxidation of the slate’s mineral composition thus turning, brown, tan, buff. A popular slate color, Semi-weathering gray/green slate can be found hundreds of miles away from the Vermont/New York slate belt and especially popular in Northeastern United Slates due to railroad access back in the mid to late 1800’s.

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