I’m with you on not overdoing the roof checks, especially with green roofs. I set up a routine: twice a year—spring and fall—plus after any really nasty weather. For me, it’s mostly visual from the hatch, unless I see standing water or plants looking off. One time I did get up there just because I heard dripping inside, and sure enough, it was just a clogged drain basket. Saved me from an unnecessary repair bill. The less foot traffic, the better those sedums seem to do.
That’s a pretty solid routine, honestly. Twice a year plus after big storms is what I usually recommend, especially for green roofs where you want to avoid trampling the plants too much. I’ve seen folks get a little too eager and end up compacting the soil or damaging the sedum just by walking around up there more than needed. Funny how sometimes less is more with these living systems.
You mentioned catching a clogged drain basket—do you ever check the drains themselves, or just the baskets? I’ve run into a few situations where roots or debris sneak past the basket and start causing slow drainage further down the line. Not super common, but it can be a pain if it goes unnoticed for a while. Just curious if that’s ever come up for you.
Also, have you noticed any difference in plant health or roof performance depending on how wet the seasons are? Some of my clients with green roofs say they barely have to do anything in a mild year, but after a really rainy spring, they’ll see more pooling or even some moss creeping in where it shouldn’t be. Wondering if you’ve had to tweak your routine based on weather swings.
One thing I’m always torn about is whether to do a quick walk-around after every heavy windstorm, or just stick to the regular schedule unless there’s an obvious issue. Sometimes it feels like overkill, but then again, I’ve seen small problems turn into bigger ones when they’re left too long. How do you decide when it’s worth getting up there versus just keeping an eye out from below?
And out of curiosity, do you handle any minor fixes yourself, or do you call someone in if you spot something off? I know some folks are comfortable patching up small things, but others prefer not to mess with the membrane or drainage layers at all.
I’ve seen folks get a little too eager and end up compacting the soil or damaging the sedum just by walking around up there more than needed.
That’s spot on. I learned the hard way—one spring, I got up there after every rain, thinking I was being proactive, but all I did was mash down the plants. Now I only check the drains themselves if I notice pooling or slow drainage, not just the baskets. Found a root clog once that took me ages to clear out. As for fixes, I’ll patch a bit of membrane if it’s minor, but anything bigger and I call in the pros. Not worth risking a bigger leak.
Now I only check the drains themselves if I notice pooling or slow drainage, not just the baskets.
That’s pretty much where I landed too. Used to think more was better, but all I did was trample the sedum and make more work for myself. I did have one spring where I ignored a slow drain and regretted it—water found a way under the membrane and dripped into the office below. Lesson learned: don’t overdo it, but don’t ignore the warning signs either. Calling in pros for bigger fixes is smart—membrane patches can get tricky fast.