That’s a really solid approach—maintenance is everything with flat roofs, especially in wet climates. I’ve seen too many issues crop up just from neglected drains or debris buildup. You’re right, the drainage design is critical; even a well-installed membrane can’t compensate for standing water over time. I do think flat roofs get unfairly criticized, but like you said, they’re not “set and forget.” Pitched roofs might hide small problems longer, but at least with flats, you usually spot trouble before it gets out of hand... assuming you’re checking regularly.
Flat roofs get a bad rap, but honestly, most of the horror stories come down to poor maintenance or lazy design. If you’re on top of cleaning out the drains and keeping debris off, you’re already ahead of 90% of the problems. One thing I’d add—if you want to really make a flat roof work in a rainy spot, consider a green roof system. The extra layers help with drainage and insulation, plus you get some bonus greenery. It’s not “set and forget,” but nothing worth having ever is.
I get where you’re coming from, but I’ve seen a few flat roofs go south even with regular cleanups—especially in spots with crazy rainfall. Sometimes it’s just the original slope being off by a fraction, and water starts ponding in weird spots. Green roofs are cool for sure, but I’d double-check the structure can handle that extra weight before going that route. My uncle’s old place had a flat roof and he was up there every fall with a broom... still ended up patching leaks after a couple bad storms. Maintenance helps, but design’s gotta be right from the start.
That’s a fair point about the original slope—just a tiny miscalculation can cause a lot of headache down the line, especially with heavy rain. I’ve managed a few buildings where the drainage just wasn’t up to snuff, and even with regular sweeping and gutter checks, ponding still happened in the same spots. Green roofs are awesome, but yeah, I’d always get a structural engineer to sign off before adding that kind of load. Maintenance helps, but if the design isn’t right from the get-go, you’re kind of fighting a losing battle.
I hear you on the drainage headaches—once ponding starts, it’s tough to reverse without major work. I’ve seen green roofs help with water retention, but yeah, if the original slope or load calculations are off, you’re just masking a bigger issue. Sometimes people underestimate how much even a couple extra inches of soil can weigh after a storm... always worth double-checking the math before adding anything up there.