Yeah, skipping new flashing is asking for trouble. I learned the hard way—thought I could reuse what was there, but a year later I was tearing up sedum to get at a slow drip. Curious if anyone’s found a good way to spot leaks early, before you end up with a swampy mess?
Honestly, I get why people say always use new flashing, but if you’re careful and the old stuff’s in good shape, sometimes it’s fine. Not everyone has the budget for a full redo every time. As for leaks, I just check after heavy rain—look for damp patches or that musty smell. Not high-tech, but it’s saved me from bigger headaches more than once.
- Seen a lot of reused flashing that *looked* okay but hid rust under the surface—especially on older homes.
- Musty smell tip is solid, but sometimes leaks show up in weird spots, not just where you’d expect.
- Had one client with a “perfect” roof who only spotted the issue when a ceiling stain popped up months later... always surprises me how sneaky water can be.
- For green roofs, local inspectors here want proof the old flashing’s still got plenty of life left. Ever had pushback from your city about reusing materials?
Yeah, reused flashing is a real gamble, especially on anything built before the 80s. I’ve pulled up stuff that looked fine on the outside—zero pitting, no visible rust—but then you flip it over and it’s just flaking apart underneath. Water always finds the tiniest path, and by the time you see a ceiling stain, it’s usually been working its way in for months. That “perfect” roof scenario is way more common than folks think.
On the green roof side, inspectors here (I’m in the Midwest) are pretty strict too. If you can’t show recent photos or some kind of test result, they’ll almost always make you replace the old flashing. I get where they’re coming from, but sometimes it feels like overkill if the material’s still solid. Had one job where we had to swap out copper flashing that was only ten years old—felt wasteful, but it kept the project moving.
I’d say it’s worth pushing back a little if you’ve got proof the flashing’s in good shape, but honestly, sometimes it’s just easier to budget for new material and avoid the hassle. Inspectors can be unpredictable...
Water always finds the tiniest path, and by the time you see a ceiling stain, it’s usually been working its way in for months.
That’s exactly what happened with my last project—looked fine on top, but underneath it was like peeling a croissant. I get the logic behind replacing flashing, even if it feels wasteful. Inspectors here (PA) are just as unpredictable...sometimes they’ll pass stuff I’m sure is borderline, then flag something that looks brand new. At this point, I just factor in fresh flashing for any big roof job. Less stress, and fewer surprise leaks down the line.