Drainage definitely seems like one of those things people overlook until it's a problem. I'm still a bit skeptical about green roofs myself—seems like they need pretty precise planning. But glad to hear there are straightforward fixes when issues pop up...makes me feel slightly more optimistic about considering one someday.
Green roofs can indeed be tricky—I once worked on a project where the homeowner underestimated the drainage requirements. Ended up having to retrofit additional drainage layers, which wasn't cheap or easy. They're doable, but definitely require careful planning upfront...
Haha, sounds familiar... I once thought I'd DIY a green roof on my shed—ended up with a swampy mess and some very happy frogs. Definitely learned the hard way about drainage!
Green roofs can definitely be tricky, but honestly, drainage isn't always the main culprit. I've seen DIY setups where the real issue was actually the type of soil or substrate used—too dense or organic-rich, and it just holds water like a sponge. A friend of mine switched to a lighter, mineral-based mix (think gravelly, sandy stuff) and it made a huge difference. Frogs might've been disappointed, but the roof stayed healthy and dry...
Just went through something similar myself. Drainage was fine, but the soil was a soggy mess. Here's what worked for me: first, I stripped out the heavy organic stuff (it was basically compost at that point...). Then I layered down a thin drainage mat, topped with a sandy, gravelly mix like you mentioned. Instant improvement—no more mini-swamp on my roof. Frogs might've packed their bags, but at least my ceiling isn't leaking anymore.
