Finally tackled that metal edging thing on my roof

- Totally see your point about peel-and-stick.
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“I’ve seen a few older roofs where the peel-and-stick actually trapped moisture under the metal and made things worse.”

That’s interesting about the membrane bunching up - I’ve run into that too, especially where the metal panels weren’t perfectly flush. It’s wild how a tiny wrinkle under the metal can end up being a spot for water to just sit and do its thing. I’m in the southeast, so humidity is a constant battle, and I’ve always worried about trapping moisture under anything that’s supposed to be “protective.” I tried peel-and-stick on a shed roof a few years back, thinking it’d be a set-it-and-forget-it solution, but after a couple of seasons, I noticed some rust lines right along the seams. Ended up pulling it off and going with a butyl-based tape, which seemed to bond better and didn’t have the same issues with water getting trapped.

I’ve heard mixed things about butyl tape, though. Some folks say it holds up better in the heat, others complain it gets gummy and attracts dirt. For me, it’s been easier to work with than the peel-and-stick, especially around corners and odd angles. I do wonder if it’s just a matter of how well you prep the surface before applying anything - if there’s even a little dust or oil, nothing seems to stick right for long.

Curious if anyone’s tried those newer hybrid sealants? I saw a tube at the hardware store that claimed to be “permanently flexible” and “waterproof,” but I’m always skeptical of marketing. My roof’s about 18 years old, so I’m just trying to squeeze a few more years out of it before a full replacement. Anyone had luck with those, or is it just another gimmick?

I’ve had similar issues with butyl tape - on one hand, it sticks like crazy if the surface is spotless, but if there’s even a hint of dust or old caulk, it just peels up after a season. I’ve noticed the “gummy” thing too, especially during our hot summers. As for those hybrid sealants, I tried one (can’t remember the brand, gray tube) on a gutter joint last year. It was easy to apply and stayed flexible, but it did pick up a fair bit of grime. No leaks yet, though. I’m always a bit skeptical about “permanent” claims... nothing seems to last forever on a roof that’s seen a few decades.

Yeah, I hear you on the butyl tape. I’ve had it turn into a sticky mess on south-facing seams after a couple of hot weeks. Prepping the surface is such a pain, too - sometimes I wonder if it’s even worth the hassle. Those “permanent” labels always make me laugh... between sun, rain, and all the old repairs, nothing really lasts up there. I’ve started using a paintable sealant for touch-ups, but even that gets grimy after a while.

Those “permanent” labels always make me laugh... between sun, rain, and all the old repairs, nothing really lasts up there.

Right? “Permanent” just means it’ll last until the next heatwave or thunderstorm. I’ve had butyl ooze out and stain my siding - looked like a melted crayon. Paintable sealant’s a little better, but yeah, grime finds a way. Ever tried those hybrid polymer sealants? Supposed to hold up better, but I’m skeptical.

I hear you on the “permanent” thing - my last attempt at a “lifetime” sealant lasted maybe two summers before it started peeling up. I did try one of those hybrid polymer types last year, mostly because I was curious if it’d handle the wild temperature swings here. It’s holding up better than the butyl so far, but I’m still seeing some grime build-up around the edges. Have you noticed any difference in how easy it is to clean those spots, or is it just me? Sometimes I wonder if the green roof plants help or hurt with all this mess...

I honestly think the green roof plants are part of the problem with the grime, at least on my setup. I get way more gunk around the edges now than I did before I added them. The polymer sealant does seem to hold up better, but cleaning that edge is still a pain - almost feels like it attracts the dirt sometimes. Maybe it’s just the combo of pollen and plant runoff? Hard to say, but I wouldn’t call it “low maintenance” yet.

Maybe it’s just the combo of pollen and plant runoff? Hard to say, but I wouldn’t call it “low maintenance” yet.

I get what you’re saying about the grime, but I’m not convinced it’s just the plants. On mine, the buildup seemed worse before I had any greenery at all - it was mostly dust and whatever blew in. Once I added sedum, the runoff changed, but honestly, the polymer edge felt easier to wipe down than bare metal. Maybe it’s a climate thing? I’m in a drier area, so less pollen overall. Still, “low maintenance” is definitely a stretch...

I’ve noticed the same thing with the so-called “low maintenance” claims. When I first put in metal edging on my green roof, I figured it’d be a set-it-and-forget-it situation. Not quite. Before I had any plants up there, the dust and debris would just collect along the edge, especially after a windy week. I’m in the Midwest, so we get a fair bit of pollen in spring, but honestly, the worst buildup was always after dry spells when everything just kind of settled.

Once I added some drought-tolerant sedum and a few native grasses, the runoff definitely changed. I started seeing more organic gunk - bits of leaves, some greenish residue after heavy rain - but it didn’t seem to stick as much to the polymer edge compared to the bare metal. The polymer has a bit of texture, which I thought would make it harder to clean, but it actually seems to repel the grime better. Maybe it’s just less static or something? Not sure about the science there.

Still, “low maintenance” is a stretch. I’m up there every couple months with a brush and a bucket, especially after storms. The metal edging does seem to corrode a bit faster where water pools, even though it’s supposed to be coated. I’ve had to touch up a few spots already, and it’s only been three years. The polymer edge is holding up better, but it’s not immune to UV fading.

Climate probably plays a big role. My cousin out in Arizona barely gets any buildup at all, but he’s got a totally different setup - almost no rain, and his plants are all succulents. Here, between the humidity and the mix of pollen and dust, it’s just an ongoing battle. I wouldn’t call it a nightmare, but it’s definitely not as hands-off as the brochures make it sound.

If I had to do it over, I might look into a different edge material or maybe even a slightly raised lip to keep runoff from pooling. Live and learn, I guess...

Man, you nailed it with the “low maintenance” myth. I swear, every time a storm rolls through, I’m up there picking out twigs and mystery gunk like I’m on some weird rooftop Easter egg hunt. Midwest weather just loves to keep us humble. I tried metal edging too - looked great for about a year, then the rust started creeping in right where water pooled. Polymer’s holding up better for me as well, but yeah, that UV fade is real. At this point, I just call it “patina” and pretend it’s intentional...

I hear you on the “low maintenance” promise. I went with galvanized steel for the edging, thinking it’d be a one-and-done deal, but after two winters in central Illinois, I’m seeing rust too - especially where the run-off pools near the downspouts. Tried sealing it, but that only slowed things down. Polymer looks okay from the street, but up close, the fading is obvious. At this point, I’m just weighing if it’s worth the hassle or if I should just budget for a redo every few years. Maintenance-free is definitely oversold in this climate.

That “maintenance-free” label gets tossed around way too much, especially in places like central Illinois where the freeze-thaw cycle just chews up anything metal. I’ve seen galvanized steel edging go from shiny to spotty rust in less than two years, mostly right where the water likes to hang out. The sealants help, but like you said, it’s just buying you time. I’ve even had a couple clients try double-coating with marine-grade stuff, but the rust still finds a way through eventually, especially if there’s any nick or scratch.

Polymer’s a weird one too. From the curb, it looks fine, but up close, the UV damage and fading are hard to miss. I had a neighbor who went with a dark brown polymer trim, and by the end of the second summer, it was this patchy grayish color. He tried touching it up, but it never really matched again.

I keep wondering if copper is worth the upfront cost for edging, since it weathers but doesn’t really rust out. But then again, it’s a magnet for thieves in some neighborhoods, and the price is just wild these days. Stainless steel’s another option, but I’ve seen it stain too if it’s not the right grade, especially near salty roads in winter.

Have you looked into any of those powder-coated steel options? I’ve only seen a couple installs, but I’m curious if the coating actually holds up better long-term, or if it just chips and ends up in the same boat. Or maybe it’s just a matter of accepting that nothing’s truly “set it and forget it” around here, and budgeting for touch-ups every few years is just part of the deal.

Curious if anyone’s found a material that actually lives up to the hype, or if it’s all just marketing in the end.

Yeah, “maintenance-free” is one of those phrases that always makes me roll my eyes a bit, especially around here. I’ve tried powder-coated steel on a shed roof, and honestly, it looked great for the first couple years. But once a branch scraped it during a storm, the coating chipped and rust started creeping in right at the scratch. It’s definitely tougher than plain galvanized, but not invincible - especially with all the freeze-thaw cycles we get.

Copper’s tempting, but like you said, the price is just nuts now. Plus, I’ve heard stories about folks waking up to find their trim missing after a weekend away. Stainless is hit or miss too - if you don’t get the marine-grade stuff, it’ll still get those ugly tea stains, especially with all the road salt in winter.

At this point, I just plan on doing touch-ups every couple years. I haven’t found anything that truly lives up to the hype, unless you’re willing to pay through the nose or live somewhere with perfect weather. Maybe someday someone will invent the magic material, but for now, it’s just part of owning a house around here.

Yeah, “maintenance-free” is definitely one of those marketing things that never quite pans out, especially around here with the weather doing its thing. I did some metal edging last fall - just basic galvanized stuff - and figured it’d be a quick win. But I already see a couple spots where the coating’s flaked off from hail or debris, and you can bet rust isn’t far behind.

Here’s what I’ve been trying: first, I keep a little wire brush handy for any scratches or chips. If I catch them early, a quick scrub and dab of rust-inhibiting primer seems to keep things in check... for now anyway. After that dries, I slap on some matching touch-up paint (doesn’t always match perfectly, but from the ground it looks fine).

Copper looked awesome when we did a fancy porch roof for a client, but yeah - price is wild and theft is a real worry. Stainless is tempting too, but unless you’re right on the coast or have deep pockets, it’s overkill. Seems like there’s no magic bullet - just regular checkups and staying ahead of any damage before it spreads. House maintenance just never ends, does it?

Maintenance-free is definitely a myth, especially with the kind of hail we get. I’ve seen even “heavy-duty” coatings take a beating after just one bad storm. Your wire brush and primer routine is pretty much what I do too - catching those chips early makes a huge difference. Stainless always sounds good until you see the price tag. Honestly, I’d rather spend that money on something more fun than roof trim... but here we are, right?

Yeah, that “maintenance-free” marketing is a joke around here. I tried a so-called “hail-resistant” paint last year, and it still got dinged up after that spring storm. I hear you on stainless - looked at the price per foot and just laughed. Have you ever tried any of those rubberized coatings? I’ve seen them mentioned, but not sure if they’re worth the hassle or just another gimmick.

Have you ever tried any of those rubberized coatings? I’ve seen them mentioned, but not sure if they’re worth the hassle or just another gimmick.

- Gotta admit, I’m a bit skeptical about those coatings. Seen a couple jobs where they peeled after a year or two, especially with our freeze/thaw cycles.
- Prep is everything - if there’s even a little rust or dust left, it won’t stick right.
- They might help with minor leaks, but I wouldn’t trust them for hail protection. The stuff’s still pretty soft compared to metal.
- Honestly, for the price and effort, I’d rather just patch and repaint as needed. Maybe I’m old school, but the “miracle in a can” thing hasn’t worked out for me yet.

I’m right there with you on the skepticism. I actually tried one of those rubber coatings on a patch over my garage last fall - figured it’d be a quick fix. Prep took way longer than I expected, and even then, I’m not convinced I got every speck of dust. It looked great for a few months, but after our first big freeze, I noticed some edges starting to lift. Maybe it’s user error, but for the price, I’d rather just stick to the old patch-and-paint routine. At least with paint, I know what I’m getting into... and if it fails, I can blame myself instead of the “miracle” product.

That rubber coating stuff can be a mixed bag, honestly. I’ve seen it work wonders when the prep is spot-on, but like you said, getting every bit of dust and old paint off is a pain. If there’s even a little moisture trapped, it’ll start peeling once the temps drop. I usually tell folks to stick with what they know unless they’re ready to go all-in on surface prep. Sometimes the old patch-and-paint routine just makes more sense, especially for smaller spots.

I tried that rubber stuff last year on a section of my garage roof. I’ll admit, I was lured in by the idea of just rolling it on and being done, but the prep took way longer than I expected. Scraping off old paint, sanding, then wiping everything down - by the time I finished, I was questioning if it was worth the hassle. For a bigger area, maybe it makes sense, but for little patches? Honestly, a wire brush and some rust paint did the trick faster and held up just as well through winter. Maybe I’m just too impatient for all that prep...