Synthetic slate is lighter, sure, but I’ve seen it ripple when attics get oven-hot. Ventilation’s supposed to help, but I’ve noticed a lot of guys just toss in a ridge vent and call it a day.
I get where you’re coming from, but honestly, the rippling is usually a sign something else got skipped. Synthetic slate needs a solid deck and proper fasteners—if the attic’s roasting, that’s often because the insulation or airflow isn’t balanced. Just slapping on a ridge vent doesn’t cut it. I’ve seen green roofs (sedum mats, for example) keep attic temps way lower, and they don’t fade or warp like some synthetics do. It’s more upfront work, but you avoid a lot of those headaches down the line.
Green roofs are cool and all, but they’re not really practical for most folks, especially if you’re in a spot with heavy snow or you don’t want to deal with the extra weight and maintenance. I’ve put down a lot of synthetic slate over the years, and as long as the deck’s solid and you use the right fasteners, it holds up fine—even in hot attics. Usually when I see rippling, it’s because someone cheaped out on the install or skipped the underlayment. Ventilation matters, but so does just following the manufacturer’s instructions.
Yeah, I’ve seen the same thing with synthetic slate—way lighter than the real deal, and you don’t need to beef up your rafters just to handle the load. Had a neighbor try to go with actual slate a few years back… let’s just say his contractor had a field day with the structural upgrades. I’ve also noticed if you skip the underlayment or use cheap nails, you’re asking for trouble, especially after a few freeze-thaw cycles. Not sure why folks try to cut corners on roofs—it always bites them later.
I’m curious, has anyone actually compared how synthetic slate holds up in hail storms? I know the weight is way less, but does it take a beating as well as real slate? Seems like every time we get a good hailstorm, some roof in my neighborhood gets wrecked...
I’ve actually had synthetic slate on my roof for about 8 years now—live in north Texas, so we get our fair share of hail. To be honest, it’s held up better than I expected. A couple of neighbors with real slate lost a bunch of tiles after last spring’s storm, but mine just had a few scuffs. The lighter weight is a plus for older homes, too—less stress on the structure. That said, I’ve seen some cheaper synthetics crack, especially if they’re not installed right or if the hail is baseball-sized. Real slate is tougher in some ways, but when it breaks, it really shatters and gets expensive to replace piece by piece. Synthetic isn’t perfect, but for hail-prone areas, I’d say it’s at least worth considering.