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unfading green roofing slate come from

Where does unfading green roofing slate come from?

By     Apr 8th, 2019

Natural roofing slate formed 400 million to 550 million years ago, is a microcrystalline, fine grained metamorphic rock. The color of slate comes from the region’s mineral and chemical composition. The main minerals are quartz/silica, white mica, black mica, chlorite, hematite and carbonates. Chlorite produces green slates. In North America green slate comes from Vermont, New York and Newfoundland. The shades of green will vary depending on the quarry and region.  The color/shade may also change as the producer encounters different color layers in the quarry.  In Vermont and New York their unfading green slates range from bright green to gray/green tones.  In Newfoundland the slates range from blue/green, gray/green or olive to light grey.

Unfading Green slates are one of the most popular roofing slates.  They can be used alone or as one of the blended colors used on a multicolored roof or slate pattern. When architects specify a color, they should understand that producers and distributors may have a trade name for the slate. Typically, an “unfading” slate will be slightly more expensive than a “weathering” slate.

Samples of semi-weathering gray green slates showing the color variation

Once you’ve narrowed down your slate color, ask for samples showing the color range to expect in a pallet so there are no surprises when the material arrives at the jobsite.  Once you’ve received your slate pallets, an experienced slate roofer will blend and sort the pieces from the various pallets to avoid blotches on the roof.

Back in 1996 we supplied 340 squares of the Newfoundland Slate Trinity Green (16” x 8” x ¼”) for the Magna International headquarters in Aurora, Ontario, Canada. The owner, Frank Stronach, designed the building to mirror its European offices in a 400-year-old castle near Vienna.  This gorgeous chateau style building is 70,000 square feet!

For more information on our slate colors, please call our sales office at Toll Free 1-800-975-2835.

By     Apr 8th, 2019

Sheena Owen

Sheena Owen began working for North Country Slate on October 12, 1999. Started as the Sales Coordinator and transitioned to a Sales Representative. Daily duties include providing customer service, new business development, inside sales, handling all cross-border customs issues/documentation, arranging shipments, health and safety representation and social media marketing. Sheena graduated from the University of Guelph in 1992 with a BA in English and Drama and in 1995 graduated with a Diploma in Radio and Television Broadcasting from Centennial College. Sheena’s first job was the Executive Producer’s Assistant for TV shows including Robocop, F/X The Series and Nikita. She went on to becoming an Assistant Manager at Eddie Bauer. In her spare time, Sheena enjoys traveling, gardening and hikes with family and friends.
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