semi-weathering gray-green roofing slate


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Semi-Weathering Gray-Green Roofing Slate is a popular Vermont roofing material. This roofing slate can “weather”, meaning it will take on brownish tones over time. Because of its excellent properties and performance, warm coloration after weathering and economical price, this natural Vermont slate is frequently used for residential and institutional projects. Semi-Weathering Gray-Green Roofing Slate is available in many sizes and thicknesses.

stone type



Gray green with some shade variation. Natural veining and markings occur.

weathering characteristic

“Semi-weathering”, meaning that some pieces change color when used outside and others do not. Those that do take on brownish tones. (Semi-Weathering Gray-Green Roofing Slate's weathering characteristic is an aesthetic consideration and does not adversely affect its performance or durability).


ASTM Grade A, relatively even cleft, exceptionally strong and hard, durable, dense, low absorption rate, resistant to freeze-thaw cycles. No detrimental effects on the environment.




Minimal. Broken shingles can be easily replaced with the use of a slate ripper.


upon request

ASTM results

upon request


stone image | specifications | finishes | applications | projects

Finishes Descriptions

Roofing - generally natural cleft both faces with trimmed edges.