Maintenance definitely isn’t optional, no matter what the sales pitch says.
That’s spot on. I’ve seen plenty of metal roofs that looked fine from the ground, but once you get up there, seams can be pulled just enough by hail to let water creep in over time. Had a client last year who thought his roof was untouched after a storm—until we found rust starting at a seam inside the attic. My usual routine is: check for dents or shifted panels outside, then look for any staining or damp insulation in the attic. Even if you don’t see leaks right away, those little gaps can add up after a few seasons. Metal’s tough, but it’s not magic.
I’ve seen the same thing—folks assume if there’s no obvious denting, the roof’s fine. But I’ve crawled through enough attics to know that’s wishful thinking. My process is pretty similar: I’ll start outside, look for any panels that seem even a hair out of line, then check the fasteners (those can back out just a bit after a big hailstorm). After that, it’s up in the attic with a flashlight, poking around for any hint of moisture or rusty spots.
One thing I’m not sold on is the idea that all metal roofs are equally vulnerable. Some of the newer standing seam systems seem to hold up better than the older exposed fastener types, at least from what I’ve seen around here. Curious if anyone’s noticed a difference between panel types or coatings after hail? Sometimes it feels like the paint finish matters almost as much as the gauge of the metal.
I’ve seen standing seam take a beating and still look brand new, while the old screw-down panels at my uncle’s place looked like someone played whack-a-mole on them after last spring’s hail. The paint finish really does seem to make a difference—my neighbor’s roof has this fancy “weathered copper” coating, and it shrugged off the same storm that left chips all over our plain galvalume. I’m still not convinced thicker metal always means tougher, though. Sometimes it just dents deeper.
I’m still not convinced thicker metal always means tougher, though. Sometimes it just dents deeper.
Funny you mention that—last year I replaced a barn roof with 26 gauge panels, thinking they’d hold up better than the old 29 gauge. After one decent hailstorm, the dents were just as bad, maybe even more noticeable because the panels didn’t flex as much. Makes me wonder if the paint finish is actually doing more of the heavy lifting than we give it credit for. Has anyone seen a difference between matte and glossy finishes when it comes to hail marks? I’ve only ever installed the standard stuff, but folks around here swear by those textured coatings.
the dents were just as bad, maybe even more noticeable because the panels didn’t flex as much.
I’ve noticed that too—sometimes the thicker stuff just gets a different kind of dent. Honestly, I think the substrate under the metal matters more than folks realize. If there’s not enough support underneath, even 24 gauge will show hail marks. As for finishes, I’ve only tried matte once and it seemed to hide the scuffs better, but didn’t really stop dents. Maybe it’s more about hiding damage than preventing it?