I get the urge to improvise—pool noodles are cheap and surprisingly handy. But I’ve run into similar pushback from inspectors when I tried using foam backer rod for a gap on my porch roof. They flagged it for trapping water too, which honestly hadn’t crossed my mind at first. What ended up working for me was a combo of rigid insulation board cut to fit, then sealing the edges with a proper waterproof membrane. Not as fun as pool noodles, but it passed inspection and hasn’t caused any issues so far. Sometimes the “creative” route just isn’t worth the headache...
I get where you’re coming from about inspectors not loving the “creative” fixes. But honestly, I’ve seen a few cases where rigid insulation and membrane still ended up with moisture issues, especially if the fit wasn’t perfect or the membrane didn’t get lapped right. Sometimes those little gaps are sneaky, and water finds its way in no matter how careful you are.
One thing I’ve noticed is that a lot of folks skip over checking the vapor barrier details, especially on older homes or when retrofitting for green roofs. If there’s any chance of condensation forming inside that assembly, even the best rigid board can start to degrade or trap water over time. I usually recommend a step-by-step check: first, make sure the substrate is bone dry, then use a compatible primer before laying down the waterproofing. After that, test for leaks with a hose before adding any soil or plants. It’s a bit more work upfront, but it can save a ton of headaches later.
Not saying pool noodles are the answer (they’re fun but yeah, not code), but sometimes even “approved” materials need a second look depending on your climate and roof structure.
Yeah, I’ve seen “approved” systems fail too, especially after a heavy storm or two. Even with everything installed by the book, seams can open up or water finds its way through the tiniest gap. I always tell people—don’t trust just the product specs, check every detail yourself. I’ve had to rip up green roofs because someone skipped a primer or didn’t let things dry out enough. It’s tedious, but skipping steps just isn’t worth it in the long run.
Even with everything installed by the book, seams can open up or water finds its way through the tiniest gap.
Yeah, that hits home. I’ve seen “approved” membranes peel right up after a freeze-thaw cycle, even when they looked perfect at install. Sometimes it’s not even the product—it’s a humid day, or someone’s in a rush and skips backrolling. I always say, the devil’s in the details... and water finds every single one.
the devil’s in the details... and water finds every single one.
Ain’t that the truth. I’ve watched seams that looked tight as a drum start bubbling after just one cold snap. Sometimes it’s not even a big mistake—just a tiny spot missed with the roller or someone didn’t press hard enough. Makes you paranoid about every little wrinkle, honestly.