Quick fix or redo: dealing with damaged aluminum flashing

Green roofs look cool on paper, but in reality, they’re a whole different animal compared to just swapping out flashing. I’ve seen a few folks go that route thinking it’d solve water issues, but honestly, unless you’re ready for the extra weight, drainage layers, and ongoing maintenance, it’s usually more trouble than it’s worth for a typical home. As for materials, copper or stainless steel flashing is definitely tougher than aluminum, but you’re also looking at a much higher price tag. For most residential jobs, good quality aluminum - properly installed and maintained - does the trick. If leaks keep coming back, it’s usually an installation or design issue rather than the material itself.

I get where you're coming from - green roofs aren’t a plug-and-play fix for leaks or flashing problems, and yeah, they do need more planning and upkeep than most folks expect. That said, I wouldn’t write them off entirely for homes. With the right structure and some upfront work, they can be a game changer for insulation and stormwater management. I’ve seen a neighbor’s place stay way cooler in the summer after they put one in, and their drainage setup actually helped with the old leak issues.

On the flashing side, totally agree that aluminum works fine if it’s installed right. I went copper once on a small porch roof just because I wanted zero maintenance, but it was definitely a splurge. For most spots, I stick with aluminum and just keep an eye out for corrosion or loose nails after storms.

If you’re dealing with repeat leaks, sometimes it’s worth stepping back and looking at the whole roof design - gutters, slope, all of it. Sometimes the “quick fix” is really just a band-aid.

I get the appeal of aluminum flashing for sure - cost and ease of installation are hard to beat. But honestly, I’ve seen a lot of callbacks where the issue wasn’t just corrosion or loose nails, but actual deformation from thermal movement or wind uplift. Sometimes, especially on older homes or spots with tricky angles, it’s worth considering a heavier gauge metal or even switching to a step flashing detail instead of continuous. Quick fixes can work for a while, but if you’re seeing the same leak pop up after every storm, it might be time to rethink the material or even the whole assembly. Just patching over the same spot doesn’t always cut it long-term...

Couldn’t agree more about the quick fixes not holding up, especially with aluminum. I’ve lost count of how many times I’ve seen the same leak show up year after year because someone just slapped some caulk or a patch over it. Aluminum’s fine for some spots, but once it starts flexing from heat or wind, it never really sits right again. I’ve seen it actually pull away from the wall after a couple of freeze-thaw cycles - then you get water sneaking in behind the siding or into the roof deck.

I’m a big fan of step flashing, especially around chimneys or dormers where water likes to find its way in. It takes a bit more time to install, but I’ve seen it outlast continuous flashing by years, especially if you use a heavier gauge. Galvanized steel’s not that much pricier and holds up better in rough weather, at least around here (Midwest - lots of wind and snow). Sometimes folks just want the cheapest fix, but if you’re paying for repairs every spring, it adds up fast.

Totally get what you’re saying about step flashing - seen it hold up way better than the “just caulk it” approach. I’m curious, though, have you ever tried copper flashing? I know it’s pricey, but I’ve heard it can last decades if installed right. Wondering if it’s worth the investment in places with wild weather swings like we get here.

I know it’s pricey, but I’ve heard it can last decades if installed right. Wondering if it’s worth the investment in places with wild weather swings like we get here.

Copper flashing is basically the Rolls Royce of flashing materials - expensive upfront, but man, it’s got staying power. I’ve swapped out plenty of bent-up aluminum for copper on older homes, and those spots just never seem to leak again. Only catch is you’ve got to watch for galvanic corrosion if it’s touching other metals. In wild climates, though, it really does hold up. If the budget allows, I’d say go for it…unless you’ve got a magpie problem. Those birds love shiny stuff.

- Copper’s definitely the gold standard for flashing, but it’s not always necessary unless you’re planning to stay in the house for decades or you’re dealing with a lot of ice and snow cycles.
- Aluminum’s a lot more common because it’s cheaper and easier to work with, but it does get beat up faster - especially if you’ve got hail or big temp swings.
- If you’re seeing damage just in a few spots (like dents or minor corrosion), you can sometimes patch or replace just those sections. But if the aluminum’s starting to pull away or you’ve got leaks, a full redo is usually smarter.
- One thing I see a lot: folks mix metals without thinking about it, and then you get that galvanic corrosion mentioned above. If you go copper, make sure it’s not touching steel or aluminum anywhere.
- In wild weather areas, copper’s a solid investment, but it’s not magic. You still need good install and regular checks. I’ve seen copper last 50+ years on old Victorians, but I’ve also seen it fail early if it wasn’t installed right.
- If budget’s tight, heavy-gauge aluminum with a good paint coating can hold up decently, just expect to keep an eye on it every few years. Copper’s more of a “do it once, forget about it” deal...unless the birds get to it first.

Had a place with aluminum flashing on a low-slope roof, and every spring I’d find new dents or spots where it looked like squirrels had been holding dance parties. Patching worked for a while, but once the seams started lifting, it was game over - water found its way in no matter what. Ended up redoing it with heavier aluminum and a better paint coat, since copper was way out of budget. Honestly, as long as you keep an eye on it and don’t mix metals (learned that one the hard way), it holds up okay... but I do wonder if copper would’ve saved me some gray hairs.

- Been there with the squirrel “dance parties” - mine seemed to invite raccoons too, like it was some sort of roof club.
- I stuck with aluminum for cost reasons too. Copper looks great but my wallet said nope.
- Patching worked for a couple years, but after that, water just found new ways in. Not sure if copper would’ve lasted forever, though... I mean, wouldn’t critters still mess with it?
- Heavier aluminum + decent paint coat = best compromise I’ve found. Still gotta check for corrosion, especially where the paint chips.
- Mixing metals... learned that lesson the hard way too. Ended up with some weird stains and extra repairs. Galvanic corrosion is no joke.
- Anyone tried those rubberized coatings as a sealant? Wondering if that’d add a few years or just peel right off in the sun.
- Honestly, I’m just hoping to get 10 years out of this setup before the next roof headache shows up.

Rubberized coatings seemed like a good idea when I tried them, but honestly, after two summers, most of it started peeling where the sun hit hardest. Maybe it helps in the short term, but I wouldn’t count on it for a decade. I’m with you - heavier aluminum and regular touch-ups are about as much as my budget can handle. Copper’s nice, but not at those prices.

Rubberized coatings seemed like a good idea when I tried them, but honestly, after two summers, most of it started peeling where the sun hit hardest.

Yeah, I’ve seen that happen too. Those coatings just don’t hold up under direct sun, especially if you’re in a spot that gets hammered all summer. I get why people try them - seems quick and cheap at first - but it’s a pain when you’re scraping off flakes a couple years later. Heavier aluminum’s not fancy, but it does the job. You ever try doubling up the flashing in the worst spots, or is that just overkill?

- Tried doubling up flashing once where the gutter always overflows - didn’t look pretty but stopped leaks for a while.
- Not sure it’s overkill if you’ve got a spot that’s always catching water or sun.
- Honestly, I’d rather mess with extra metal than scrape rubber flakes every spring... way less messy.
- Anyone else notice the thicker stuff is a pain to bend around weird corners though?

Anyone else notice the thicker stuff is a pain to bend around weird corners though?

Yeah, that’s been my headache too. Tried saving a few bucks by using leftover heavy-gauge flashing and nearly lost my mind trying to get it to sit right around the chimney. Honestly, sometimes I wonder if just patching with sealant every year would be less hassle... but then again, that gets pricey over time. Guess it’s a trade-off between ugly but dry, or neat but leaky.

I hear you on the heavy-gauge stuff - tried wrestling some around my skylight last fall and it felt like arm-wrestling a car hood. I get tempted by the “just slap some sealant on it” route too, but every time I’ve done that, I’m back up there a year later scraping off the old gunk. For me, biting the bullet and doing it right (even if it’s a pain in the neck) has saved me more headaches in the long run. Still, I totally get why folks go for the quick fix - sometimes you just want to be done with it.

That’s the story with sealant - works for a bit, then you’re back up there scraping and redoing. I always tell folks if the flashing’s bent or corroded, it’s usually worth pulling it off and replacing instead of patching. A lot of times, water finds its way under even the best sealant jobs, especially around skylights where things shift with temperature. If you do go the full replacement route, don’t forget to tuck the new flashing under the shingle above and overlap the joints. Makes a mess now, but saves you from chasing leaks later on.

I get the logic behind full replacement, but honestly, I’ve seen plenty of situations where a careful patch with high-quality sealant and some patience actually holds up for years - especially if you’re dealing with a spot that’s not getting hammered by weather. Not saying it’s a forever fix, but sometimes budgets or tenant schedules just don’t allow for tearing into the roof right away. I do wonder if we sometimes overdo it with the “replace everything” approach when a solid repair could buy you time. Anyone else had luck stretching things out with a good patch job?

I do wonder if we sometimes overdo it with the “replace everything” approach when a solid repair could buy you time.

I’ve patched aluminum flashing on my own place a couple times, especially around the chimney where water was sneaking in. Used a combo of butyl tape and some high-grade roofing caulk, then pressed new flashing over the top. That held up for three winters in upstate NY before I finally did a full replacement. Curious - has anyone tried using those peel-and-stick flashing membranes as a patch? Wondering if they’re worth the extra cost or just marketing hype.

Curious - has anyone tried using those peel-and-stick flashing membranes as a patch? Wondering if they’re worth the extra cost or just marketing hype.

Peel-and-stick membranes actually do have their place, especially for quick patches in tough spots. I’ve used them on a few jobs where getting traditional flashing tucked in was almost impossible without tearing half the roof apart. They’re definitely pricier than just caulk and tape, but you get a solid, waterproof seal that sticks to almost anything - even in colder temps, which is handy up north.

That said, they’re not a magic bullet. If the underlying flashing is corroded or there’s structural movement, the membrane won’t last forever. It’ll buy you time, maybe a couple seasons, but I wouldn’t call it a permanent fix. For something like a chimney where water finds every little gap, I’d still lean toward a full replacement when you can swing it. But for a “get through winter” situation, peel-and-stick’s saved my bacon more than once. Just make sure the surface is clean and dry before you slap it on, or it’ll peel right off when things freeze and thaw.

I get the appeal of peel-and-stick for a quick patch, but honestly, I worry about what’s lurking underneath. If you’re just covering up corrosion or rot, isn’t that just kicking the can down the road? Has anyone tried using a more eco-friendly option, like metal flashing with recycled content or even liquid-applied membranes? Curious if those hold up better long-term, especially in places with wild temperature swings.

I hear you on the peel-and-stick - used it once on a rental, and sure enough, a year later I was peeling it back to find a soggy mess underneath. Switched to recycled aluminum flashing for my own place, and it’s held up through some nasty freeze-thaw cycles. Anyone else notice liquid-applied membranes can get brittle in cold snaps, or is that just my luck with the stuff?