Ask the Experts


Will my metal roof rust?

Posted by S. Peterson from Harrisburg, Pennsylvania

I’m concerned that exposure to rain, snow, and ice will cause my metal roof to rust. How long will my metal roof last before it begins to rust?

2 Expert Answers

  1. Answer by Joe Miller

    No. You shouldn’t have any issues with rust, and the roofing material’s integrity is guaranteed to last up to 50 years. Each panel is coated with Galvalume (a mixture of zinc and aluminum) that is proven to protect against rust up to three times longer than galvanized (zinc-coated) steel.

    On top of the Galvalume is a layer of stone texturing coated with acrylic resin that ensures a completely nonporous (water proof), UV resistant surface that won’t rust or corrode.

  2. Answer by Joe Miller

    To follow up: If your roof were to rust, and it’s under warranty, then attempting to clean off or coat the rusted area may void your roof’s warranty. If that were the case, you should call us immediately, and we’ll have someone inspect the issue as it could be a serious (but rare) manufacturing defect.

    If your roof is out of warranty, you can attempt a patch of your own by cleaning the surface of rust completely, prime it, paint it to match, and coat it with an acrylic resin. Everything you need you can find at any big-box home improvement retailer (Lowes, Home Depot, etc.).

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– Aaron J, Elizabethtown, PA

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