Makes you paranoid about every little wrinkle, honestly.
Couldn’t agree more. I’ve seen folks do everything by the book—prime, roll, double-check seams—and then a single freeze/thaw cycle exposes a pinhole they missed. Water’s relentless. Doesn’t matter if it’s a flat roof or just a low slope, it’ll find the tiniest gap and work its way in.
One thing I’ve noticed with green roofs in particular: even more risk if your drainage isn’t perfect. All that extra weight and moisture sitting up there? If your waterproofing layer isn’t flawless, you’re just asking for trouble down the line. I’ve had to tear up sections where roots found their way into a seam that looked fine at install but wasn’t pressed tight enough at the edge.
Not saying don’t do it—green roofs are great—but yeah, paranoia is justified. Double up on quality control, especially around drains and corners. Even then, sometimes you just get unlucky with how things settle after a big storm or cold snap.
