Bennington, Vermont, is located at the southern edge of a historic slate-quarrying region that stretches along more than 50 miles of the Vermont­New York state line. Slate roofs are common on older buildings of all kinds throughout the area, so when Bennington businessman Duane Greenawalt decided to build a timber-framed retail building patterned after a traditional dairy barn, he intended to cover it with a distinctive slate roof.

But as the structure neared completion, Greenawalt realized that the project budget couldn't be stretched to cover the cost of slate. Rather than give up on his original vision, he hired local builder Tim Clark to create a decorative slate-like roof with three-tab asphalt shingles.

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