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TOPIC: I Have An Existing Metal Roof and Have A Question

Issues Installing Gutters

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I have a home with a metal roof and I'm hoping to have gutters installed. One company told me that the roof was left "too long" on the edges and they would need to cut it back to allow even 6" gutters to function. They say they do this all the time. Another company told me that it was NEVER okay to cut the edges of the roof or it would rust and ruin the roof, and they would need to "build out" from the edge of the roof and attach the gutters further out to make them work. Who's right? I live in Michigan, so lots of rain and snow are inevitable, and I'll need covered gutters to avoid collecting thousands of acorns, if that makes a difference. Thanks!

Emily Beard

8/6/2019
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Cut edges must have clean, crisp cuts in order to expose as little carbon steel as possible. The zinc from the anti-corrosive coating on the steel then will go into solution with hydrogen from rain water and be deposited on the carbon steel, protecting it. I'd really ask hard how they are going to make that clean of a cut. It sounds difficult. How far do the sheets overhang?

Todd Miller
Todd Miller
Isaiah Industries, Inc.

8/6/2019
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Thanks for your response!

The metal overhangs the edge by about 2.5 inches. I've included a photo for reference. IMG_20161025_192806945.jpg

Emily Beard

8/7/2019
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It will be very difficult to get good, clean, crisp cuts while the panels are on the roof. Do not let them saw cut the ends of the panels.

Todd Miller
Todd Miller
Isaiah Industries, Inc.

8/12/2019
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That's great to know, thanks so much for your help!

Emily Beard

8/12/2019
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