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WeatherSteel - a trademark of Blackwood Associates, Inc.
WeatherSteel is a trade name of Blackwood Associates, Inc. for a cladding product generally known as Weathering Steel (although more commonly referred to by the US Steel tradename *Cor-Ten™). WeatherSteel is also frequently called the “Rusty Metal” or “Rusty Steel” or sometimes “Wrinkled Tin.” Call it whatever you like, but technically it is 18 gauge (.04875) cold rolled steel conforming to ASTM specification A-606 Type 4. WeatherSteel develops a dense oxide that results in a rustic finish when exposed to the atmosphere. It is a natural material resulting in a functional but unusual cladding that is available in a variety of profiles including Corrugated, Standing Seam, Batten Rib, Bermuda panel and various specialty shapes that will provide years of service and continue to enhance itself naturally as it ages. The unique composition of WeatherSteel includes several corrosion resistant alloys including copper, nickel and chromium. Oil canning or waviness, which is often prevalent in other types of light gauge metal cladding, is virtually nonexistent in WeatherSteel because of the thickness of this material and its non-reflective surface.



Developing Color
WeatherSteel initially has a grey, cold rolled steel appearance which changes to a reddish brown color upon exposure to moisture. It takes approximately three years to reach its ultimate color potential. Natural moisture like rainfall, dew and fog initiates the weathering process. Over time, the weathering will be fairly uniform, although different locations and elevations can exhibit a variable appearance that is not a defect in the product, but rather one of it’s features.



Naturally Appealing
If you want a unique product for your roofing or siding, consider the natural appearance of WeatherSteel.

*US Steel Trademark