norris roofing slate

specifications
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specifications

stone image | specifications | finishes | applications | projects

Norris Roofing Slate is a popular slate roofing material. Because of its performance qualities, gray/black color and natural texture, architects specify this natural slate for institutional and residential roofing projects. This slate can “weather”, meaning it will take on brownish tones over time when used outside. Norris Roofing Slate is available in several sizes and thicknesses.

stone type

slate

color

Relatively consistent dark gray/black with subtle natural veining and markings.

weathering characteristic

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

properties

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.

suitability

exterior

maintenance

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

samples

upon request

ASTM results

upon request