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Quick fix or redo: dealing with damaged aluminum flashing

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kimsurfer
Posts: 10
(@kimsurfer)
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Composites are definitely a solid move, especially if you’re tired of patching things up every couple years. I used to be all about sticking with what was cheapest up front, but after a few winters where the flashing buckled or pulled away, I started looking at the long game. The initial cost stings a bit, but not having to crawl up there every spring or after every heavy storm has been a relief.

One thing I noticed—composite flashing seems to handle temperature swings better than aluminum, at least in my area (lots of freeze/thaw cycles). Less warping, less noise when the wind picks up. I get the appeal of copper too, but unless you’re restoring a historic place or just love the look, composite feels like the practical choice.

Honestly, sometimes spending more upfront is the only way to get off that repair treadmill. You’re definitely not alone in wanting to break that cycle.


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Posts: 11
(@echog50)
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I’ve been wondering—has anyone tried mixing materials, like using composite for the tricky spots and sticking with aluminum elsewhere? I keep hearing about the cost difference, but if you only swap out the stuff that actually takes a beating, maybe it balances out. Or is that just asking for weird leaks down the road? My uncle swears by copper but his house looks like it belongs in a museum, so I’m not sure that’s the vibe I want...


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running710
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(@running710)
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- Mixing materials isn’t unheard of, but you gotta watch the transition points. That’s where leaks love to show up.
- Composite’s solid for spots that get hammered (like valleys or around chimneys), but make sure it overlaps right with the aluminum. If not, water finds a way in, trust me.
- Cost-wise, yeah, you’ll save compared to all-copper. But you might spend more on labor if the crew’s not used to mixing stuff.
- I’ve seen a few jobs where mismatched flashing led to weird corrosion at the seams. Not always, but it happens.
- Copper’s awesome but, yeah, it’s got a look. Aluminum/composite combo can work if you’re careful about how they meet up. Just double-check your sealant and fasteners—don’t cheap out there.


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Posts: 9
(@markstreamer)
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- Totally agree on transition points—those are always the trouble spots for leaks, especially with mixed materials.
- One thing I’d add: if you’re leaning composite, check if it’s recycled content. Some brands use post-consumer plastics, which is a nice eco bonus.
- Corrosion at seams is real, but I’ve had decent luck with a good butyl tape between layers. Not perfect, but helps.
- Labor can be higher, but if you find a crew that’s done mixed flashing before, it’s usually worth the peace of mind.
- And yeah, don’t skimp on sealant—cheap stuff just cracks after a couple seasons. Learned that the hard way...


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(@leadership_patricia)
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- You nailed it on the transition points—those are always where I’ve seen headaches, especially when you’re mixing old and new materials.
- I’m with you on the butyl tape. It’s not a miracle worker, but it’s saved me from a couple of nasty leaks, especially in weird weather swings.
- Sealant quality really does matter. I tried to save a few bucks once, and the stuff just peeled up after one winter. Not worth the hassle.
- Labor’s higher, yeah, but honestly, peace of mind is huge when you’re dealing with tricky flashing. I’d rather pay up front than chase leaks every rainy season.
- If you do go composite, I’d double-check the recycled content too. Some brands talk a big game but don’t actually use much post-consumer material.
- All in all, sounds like you’re thinking it through. It’s a pain now, but getting it right saves a ton of trouble down the road.


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