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Flat roofs and heavy rain: is it a disaster waiting to happen?

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simbafisher
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(@simbafisher)
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Those modular trays are definitely marketed as a “set it and forget it” solution, but in reality, nothing on a flat roof is ever truly hands-off. I’ve managed a few buildings with both traditional and tray systems, and honestly, the maintenance demands aren’t that different. The only real upside I’ve seen is if you need to swap out a section, it’s less hassle—but how often does that actually come up for most folks? Curious if anyone’s tried those newer low-profile scupper drains—are they really better at preventing pooling, or just another thing to clean out?


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hollyrunner6224
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That’s been my experience too—those tray systems sound great on paper, but you’re still out there clearing drains and checking for pooling after a heavy rain. I’ve had to swap out a couple of trays over the years, but honestly, it’s not a regular thing unless you’ve got some kind of major plant die-off or root issues. As for those low-profile scupper drains, I tried them on one of my retrofits last year. They do look sleeker and seem to handle water pretty well, but you still have to keep an eye on debris. If anything, the openings can get clogged with leaves faster because they’re so flush with the roof. I guess it’s always a trade-off—less standing water, but maybe a bit more hands-on cleaning. At least they’re easier to check during a walk-around than the old bulky ones. Just wish there was a real “set it and forget it” option... but that’s flat roofs for you.


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shadowpilot
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- I get the appeal of those low-profile scuppers, but honestly, I found the older, bulkier drains easier to snake out when things clogged up.
- The sleeker ones look nice, but if you’re not up there every couple weeks in fall, those leaves pile up fast.
- For me, the real game-changer was putting in some cheap wire leaf guards. Not perfect, but way less fuss than swapping trays or messing with new drains all the time.
- Still, nothing’s really “set and forget” with flat roofs... but I’d rather have something I can fix myself than a fancy system that costs more to repair.


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(@brewer581671)
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Wire leaf guards are a solid move. I tried those mesh dome things a while back—worked alright until the pine needles started matting over the top. Ended up having to brush them off anyway, but at least nothing big got through. I do miss the old-school drains for sheer simplicity, though. You could just reach in and pull out a handful of gunk if you had to.

The “set and forget” dream is just that with flat roofs, especially if you’ve got trees nearby. Every fall, I’m up there with a blower and a trash bag, hoping I spot any ponding before it turns into a real problem. Honestly, the fancier scuppers look sharp but if you can’t clear them out without special tools, it’s just another headache. I’d rather have something I can poke with a stick and call it a day.

Flat roofs keep you humble—no such thing as neglecting them for a season and getting away with it.


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Posts: 9
(@skyrunner12)
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I’d rather have something I can poke with a stick and call it a day.

That’s the spirit. I keep an old broom handle just for that purpose—nothing fancy, just gets the job done. Honestly, the mesh domes are good until you get those wet leaves and needles baked on. I’ve found if you do a quick check every couple weeks (especially after wind), you stay ahead of the mess. Flat roofs don’t forgive laziness, but they’re not the end of the world if you keep up. And yeah, I miss the days when you could just yank out a clump of gunk barehanded—now half these guards are like puzzles.


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