andy jones
Hello, I recently bought a house with a corten roof. It is about 6 years old. Someone told me that I had to seal the roof after it reached a certain color. Is this true? I am also installing flagstone around the house and the runoff water from the roof stains the ground. Would sealing this help or do I need gutters. What sealer would I use? Does Corten have a warranty? Thanks
Todd Miller
Isaiah Industries, Inc.
US Steel is the originator and producer of Corten. However, since the early 1980s, they have not suggested its use for architectural purposes, for the very reasons you cite. I am not aware of any sort of sealer but you can contact them to check if you wish.
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