Did you know synthetic slate can actually be lighter than real stone?

I still wonder how it’ll look in 20 years. Some of the older installs I’ve seen get a bit brittle in the cold, too.

I get what you mean about the brittleness. Up here in Ontario, we see some wild freeze/thaw cycles, and I’ve noticed certain brands of synthetic slate hold up better than others. The batch thing is definitely real, but I’ve also seen real slate roofs with color variation, especially after repairs. Guess it just stands out more with synthetic since the tiles are supposed to be uniform.

One thing I’ve noticed, though, is that some of the newer synthetic products have better UV resistance and flexibility than the ones from even 10 years ago. Manufacturers seem to be tweaking the formulas every couple of years. Not saying they’ll last as long as real stone, but I wouldn’t write them off for longevity just yet. I’d still stash a box or two from the original lot, just in case, but I’m cautiously optimistic about the newer stuff.

Funny timing, I actually helped with a synthetic slate install last winter and was kind of surprised by how much lighter it was than the real thing. Way easier on the back, honestly. One thing I did notice though - some of the older synthetic tiles we replaced were starting to curl at the edges. Not sure if that’s from the cold snaps or just age. The new stuff does seem a bit more flexible, but I’m still a little skeptical about how it’ll look after a couple decades up there. Guess time will tell...

I’ve looked at synthetic slate a few times, mostly because the price of real slate is just out of reach for me. The weight difference is a big plus, but I’ve also seen some curling on older installs around here (Midwest winters are brutal). Makes me wonder if the savings up front are worth it if you have to replace sections down the line. Still, the new stuff does look better than what was around 10-15 years ago... I’m just not convinced it’ll age as well as the real deal.

I’ve also seen some curling on older installs around here (Midwest winters are brutal). Makes me wonder if the savings up front are worth it if you have to replace sections down the line.

That curling you mentioned is definitely a thing with some of the early synthetic stuff. Midwest freeze-thaw cycles are no joke - seen plenty of roofs take a beating around here. The newer synthetics are a lot better, though. Manufacturers have tweaked the formulas and installation methods, so you don’t see as much curling or fading as you did 10-15 years ago. Still, nothing really ages quite like real slate... but then again, not many houses are built to handle that weight without some serious reinforcement.

I’ve put up both types, and honestly, for folks who want the look without the cost (or the backache), the new synthetics aren’t a bad compromise. Just make sure whoever installs it actually follows the specs - most of the problems I’ve seen come from shortcuts on install, not the material itself. If you’re planning to stay in the house long-term, it’s worth weighing the warranty and how much you want to mess with repairs down the road.

- Had synthetic slate put on our house about 7 years ago - definitely lighter than the real deal, which was a big reason we went that route.
- Midwest winters here too, and I’ve noticed a little edge curling on the north side, but nothing major so far.
- Our installer was super picky about following the specs, which might be why we haven’t had bigger issues.
- Honestly, I miss the look of real slate sometimes, but my back and my wallet don’t...
- If you’re planning to stay put, I’d say it’s worth paying attention to the warranty details and making sure whoever installs it doesn’t rush.

Funny, I was dead set on real slate until my neighbor’s roofer gave me a look like, “You sure about that?” My house is old, but even the bones started creaking at the idea of holding up all that weight. We went synthetic a few years back - honestly, unless you’re up there with a magnifying glass, it passes for the real thing. I do see some slight curling on the north side too (maybe those shingles are just as sick of winter as I am), but nothing scary yet. If you find an installer who actually reads the manual, hang onto them for dear life... mine was more of a “wing it” type and I’ve paid for it in repairs. Definitely agree - warranty and install matter way more than the marketing brochures let on.

That’s interesting - synthetic slate definitely solves the weight issue, but I’ve seen a few jobs where it didn’t hold up as well as promised. Have you noticed any color fading or cracking yet, or is it just the curling? I manage a few older buildings and we’ve had mixed results. One place with synthetic started showing weird warping after a couple of hot summers, and the warranty process was a headache since the installer cut corners.

I get that real slate can be a pain for old rafters, but sometimes I wonder if folks are trading one set of problems for another. Did your installer mention anything about ventilation or underlayment? Sometimes those details make or break synthetic roofs, especially in places with wild temperature swings. Not saying real slate is perfect - just curious if the long-term maintenance on synthetic is really that much easier.

We had a synthetic slate roof put on a 1920s duplex about six years ago, mainly because the old rafters couldn’t handle real slate anymore. The weight difference was a huge selling point, but honestly, I’ve had mixed feelings since. Color fading hasn’t been a big issue yet, but we did notice some minor cracking after a couple of freeze-thaw cycles - nothing catastrophic, but it’s there if you look close.

The installer did talk up the ventilation and underlayment, but I’m not convinced they followed through 100%. We’ve got some curling along the south-facing edge, which gets brutal sun in summer. I suspect poor airflow is part of it. Maintenance-wise, it’s definitely easier than real slate - no constant flaking or broken tiles - but you’re right, it’s not zero-maintenance either.

I’ve also run into that warranty mess before. If the install isn’t perfect, getting coverage is like pulling teeth. At this point, I’d say synthetic is easier on old buildings but only if you get someone who actually knows what they’re doing with the details. Otherwise, you’re just trading one headache for another.

At this point, I’d say synthetic is easier on old buildings but only if you get someone who actually knows what they’re doing with the details. Otherwise, you’re just trading one headache for another.

That line right there sums up my whole experience with “modern” roofing. I went with synthetic on my place too, mostly because my wallet started sweating when I saw the price for real slate and the extra bracing it would’ve needed. The roofer swore up and down that synthetic was “set it and forget it” - which, in hindsight, is about as believable as those “no maintenance” yard plants that somehow still manage to die on me.

I hear you on the warranty circus. I tried to chase down a claim for some warped tiles last year, and it felt like I was auditioning for a reality show called “Who Wants to Be Ignored by Customer Service?” They kept asking for photos, then more photos, then a letter from my installer, who by that point had vanished like a magician’s rabbit. I gave up and just learned to live with the weird wavy look on the north side.

The weight savings are real, though. My house is from the 1930s and the rafters are about as sturdy as a stack of Jenga blocks. If I’d gone with real slate, I’d probably be sleeping in the basement by now, just in case.

I do wish I’d paid more attention to the ventilation stuff. The south side of my roof gets roasted all summer, and I’ve got a few spots where the tiles are curling up like potato chips. Not a huge deal yet, but it’s one of those things that nags at you every time you pull in the driveway.

All in all, I’d say synthetic is a decent compromise for old houses on a budget, but it’s definitely not the “install and forget” dream they sell you. Still, at least I’m not up there every spring replacing broken tiles... just squinting at the roof and hoping nothing else pops up.

Weight was a huge factor for me too. My house is from the ‘40s, and the inspector basically laughed when I floated the idea of real slate. I went with synthetic because it seemed like the only way to avoid a major structural overhaul. But I totally get what you mean about the “set it and forget it” myth - mine’s needed more TLC than I expected, especially after last summer’s heatwave. Ventilation is one of those things you don’t think about until you see the tiles start to curl... live and learn, I guess.

- Weight’s a biggie for older homes, no doubt. My place is late ‘30s and the rafters are nothing to write home about. Synthetic slate was the only realistic option for me too - no way I was going to risk a sagging roof just for the “real thing.”

- The “set it and forget it” idea is definitely oversold. I’ve had to replace a few tiles after some wild temperature swings last year. They don’t always handle expansion and contraction as well as advertised, especially if your attic gets hot.

- Ventilation’s underrated. I didn’t think much about it until I noticed some warping near the ridge. Ended up adding a couple of extra vents - made a noticeable difference in attic temps and the tiles have stayed flatter since.

- One thing I wish I’d done: checked the warranty fine print. Some brands don’t cover heat-related curling, which feels like a bit of a loophole.

- All in all, synthetic’s lighter and easier on old framing, but yeah... not totally maintenance-free. At least repairs are DIY-friendly compared to real slate, which is something.

I get the whole “not maintenance-free” thing, but honestly, I’m not sure any roof is truly set-and-forget - even the real slate folks seem to have their share of headaches. My place was built in the ‘50s and I went with synthetic last year, mostly because the weight of real slate just seemed like asking for trouble. But I haven’t had any issues with tiles shifting or curling so far (knock on wood). Maybe it’s the brand? Or maybe our attic stays cooler since we’ve got a ton of shade from old trees.

I will say, I almost skipped the extra vents because I figured, “How bad could it be?” Glad I listened to my contractor. The attic doesn’t turn into a sauna anymore, and I’m guessing that’s helping the tiles hold up better. I do agree about warranties, though - some of that fine print is wild. I had to call customer service twice to even figure out what was covered.

All in all, I’d still pick synthetic again. It’s lighter, looks pretty convincing from the street, and I can actually swap out a tile myself if needed. Just don’t expect zero work, I guess.

That’s interesting about the vents - seen a lot of folks skip that step and regret it later, especially after a rough summer. Curious, have you had any big storms since switching to synthetic? I’ve noticed some brands hold up better than others when hail or high winds roll through.

Yeah, skipping vents is just asking for trouble - seen too many warped attics and peeling paint after a few hot months. As for storms, we had a nasty hailstorm last spring, and honestly, the synthetic slate held up way better than the old asphalt ever did. Not a single cracked tile, which surprised me. I was skeptical at first since it feels so much lighter, but so far, no regrets. Some brands definitely seem tougher than others though... I did a ton of research before picking ours since the wind here gets wild.

I was skeptical at first since it feels so much lighter, but so far, no regrets.

That lighter weight threw me off too when I first looked into synthetic slate. I kept wondering if it would stand up to the wind and hail we get here in the Midwest, but after two years, not a single issue. The installers even mentioned it put less stress on the rafters compared to real stone. Only thing I’m still watching is how it handles UV over time - some older synthetics faded pretty badly, but supposedly the newer ones are better. Anyone else notice color changes after a few seasons?

I’ve had synthetic slate on my place for about four years now - Midwest too, so plenty of sun and storms. The color’s held up better than I expected, honestly. There’s a tiny bit of fading on the south-facing side, but nothing major or patchy. I was worried about that after seeing some older installs in town that looked washed out. Maybe it’s the newer UV coatings? Still, I’m keeping an eye on it since our summers can get brutal. Anyone else notice if certain colors fade faster? Mine’s a dark gray and seems pretty stable so far.

I’ve seen the same thing with the darker colors - seem to hold up better than some of the lighter shades, at least from what I’ve inspected. The south and west sides always take the brunt, but honestly, the newer synthetics are a lot less prone to that chalky look you’d get with older stuff. I’m still a bit skeptical about how they’ll look after 10-15 years, though. Some of those reds and tans seem to fade out faster, but maybe that’s just bad batches or older formulas. Hard to say for sure until more time passes.

Yeah, those reds and tans always seem to get the short end of the stick. I’ve put up a few roofs with lighter synthetics and, after a couple summers, you can already spot some fading - especially on the west side where the sun’s relentless. The darker colors do seem to hide it better, or maybe they just age more gracefully. Hard to say if the new formulas will last the full 20+ years without getting that washed-out look, but at least they’re not turning chalky like the old stuff. Time’ll tell, I guess.

I’ve been eyeing synthetic slate for a while, mostly because the real stuff is just out of my price range and honestly, I’m not sure my old house could even handle the weight. The lighter weight is a huge selling point for me, but I keep circling back to the color issue you mentioned. I live in a spot that gets hammered by afternoon sun - west-facing roof, no shade - so fading is a big worry.

A neighbor down the street put on a pale gray synthetic slate about five years ago, and it looked sharp at first. Now, you can definitely see the difference between the sunny and shaded sides. It’s not terrible, but it’s noticeable, especially if you’re picky about curb appeal. I get that darker colors might hide the fading better, but then you’re dealing with more heat absorption, which isn’t great for cooling bills in the summer. Kind of feels like a trade-off either way.

I’ve read that some of the newer synthetics have UV inhibitors mixed in, but I’m skeptical. Manufacturers always promise the moon, but I want to see how these roofs actually hold up after a decade or two. My last asphalt shingles were supposed to be “30-year” and started looking rough after 12. Not chalky, but definitely washed out and brittle.

Honestly, I’m starting to think there’s no perfect solution unless you’ve got an unlimited budget. I’d rather spend a little more upfront if it means less maintenance and fewer headaches down the line, but I also don’t want to gamble on something unproven. If anyone’s had good luck with a particular brand or color, I’d love to hear about it, but right now I’m leaning toward a mid-tone gray and just hoping for the best. At least if it fades, maybe it’ll just look “weathered” instead of worn out.

I get that darker colors might hide the fading better, but then you’re dealing with more heat absorption, which isn’t great for cooling bills in the summer.

Funny thing, I’ve actually seen some of those mid-tone grays fade in a way that almost looks patchy, not just “weathered.” It’s not always subtle, especially if you’re the type to notice every little change. I know the UV inhibitors are supposed to help, but like you, I’m a bit skeptical until I see a roof that’s made it through a couple brutal summers without looking tired. Sometimes I wonder if a good old-fashioned metal roof, even with the noise, might be less hassle in the long run. At least you know what you’re getting into with those.