How to Flash a Chimney on Metal Roof the Right Way

Learning how to flash a chimney on metal roof is one of those DIY jobs that sounds a bit intimidating until you actually start cutting the metal and seeing how the pieces fit together. If you've ever dealt with a leaky ceiling right next to your fireplace, you know exactly why this matters. Metal roofs are fantastic for longevity, but they're also notorious for being unforgiving if you don't get the waterproofing right around penetrations. Unlike shingles, where you can sort of weave things in, metal requires a bit more mechanical precision and a lot of respect for how water flows. ...

May 1, 2026 · 7 min · Marilou Mariano