How to Cut Metal Roofing

Cut a Notch in Two Steps

If your roof includes a chimney or sidewall, you’ll have to make a notch.  I do this in two steps with two tools.

Cut Across the Panels

After marking the notch, I start by making the cuts across the panel, which means you’re cutting over the ribs.  The BEST way to do this is with a profile nibbler. Instead of cutting the metal, it actually makes several punches, which allows it to cut over the ribs. Profile nibblers do not track straight so move slowly.

For Long Straight Cuts

For the straight cut up the flat part of a panel I use a double cut shear. It’s fast, cuts straight and leaves a nice finished edge. Double cut shears make a 1/4-in. wide cut that creates a thin, sharp metal coil, so wear gloves and keep it from scratching the panels.

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