Yeah, sideways snow is a nightmare—no matter what you try, it finds the tiniest gaps. I’ve seen staining on rafters before, but honestly, the insulation getting damp is usually what tips me off first. Ever looked into using a green (living) roof for extra protection? It’s not a fix-all, but that extra layer really cuts down on wind-driven snow sneaking in. Wonder if anyone’s had luck with that in heavy snow areas...
Green roofs are underrated for this, honestly. I put one on my shed a couple years back—just a basic sedum mat—and it’s made a huge difference with snow blowing in. Not perfect, but the extra mass really helps buffer those wild winter gusts. It’s not cheap up front, though, and you’ve gotta make sure your structure can handle the weight. Still, I’d take that over soggy insulation any day.
