That’s a fair point about composite tiles feeling soft even before the real heat kicks in. I’ve seen similar issues—thermal expansion can cause warping, especially if the installation isn’t spot-on. One thing I’d add: freeze-thaw cycles are brutal up north. If moisture gets into those tiles and then freezes, you might see cracking or delamination over time. Asphalt isn’t perfect, but at least its failure modes are predictable. I’d be cautious about any new material that hasn’t been tested locally for a few years.
If moisture gets into those tiles and then freezes, you might see cracking or delamination over time.
I've seen that happen with old-school clay tiles, but some of the newer composites surprised me. My neighbor up in Duluth put on a synthetic slate a few winters ago—he was nervous about the freeze-thaw too. Turns out, the stuff flexed just enough and didn’t crack, even after a brutal ice storm. I still think installation is everything, though. If the underlayment isn’t sealed tight, nothing’s gonna save you from water sneaking in. Asphalt’s predictable, sure, but I’ve seen it curl and shed granules after one bad hailstorm. Sometimes “tried and true” isn’t all it’s cracked up to be.
Yeah, installation’s the real MVP here. I’ve watched my uncle try to “shortcut” the underlayment on his cabin roof, and let’s just say he got a free indoor waterfall that spring. Those new composite tiles are wild though—saw one flex under my boot and bounce back like nothing happened. Still, if you don’t seal up those edges and valleys tight, even the fanciest tile’s gonna let water sneak in. Up north, it’s all about layers...and maybe a little luck with the weather.
if you don’t seal up those edges and valleys tight, even the fanciest tile’s gonna let water sneak in.
That’s spot on. I’m curious—has anyone actually seen how composite tiles hold up after a few freeze-thaw cycles? I’ve seen traditional clay crack, but these new materials claim to flex more. Wondering if that really prevents ice dam issues or just delays them.
I’ve managed a few buildings with composite tile roofs up here in Minnesota, and honestly, they’ve done better than the old clay ones—at least for the first decade or so. The flex does seem to help with freeze-thaw, but I wouldn’t say it totally solves ice damming. If the insulation and ventilation aren’t dialed in, you’ll still get ice buildup, no matter what the tiles are made of. One thing I’ve noticed: composite tiles can hide small cracks better, but water still finds its way if those valleys aren’t sealed right. Maintenance is key, especially after a rough winter.
