Composite Shingles vs. Asphalt: Which Would You Trust Over Your Head?

I’ve seen this play out more times than I can count. People obsess over what shingle to pick, but then ignore the attic, ventilation, or even basic flashing details. I manage a bunch of properties - some with “premium” roofs that still have leaks or ice dams every winter, and others with basic three-tabs holding up just fine because the attic’s tight and the airflow’s dialed in. It’s almost funny how often the expensive stuff gets wasted on bad prep.

That said, I wouldn’t say shingle type is totally irrelevant. Composite shingles are getting better - some of the newer ones have impressive hail ratings and warranties. But if you’re in a spot with wild temperature swings or heavy snow, nothing beats making sure your attic’s sealed off from warm air leaks and your soffit vents aren’t choked with insulation. I’ve had tenants crank up the heat in winter, then call me about mystery leaks... nine times out of ten it’s condensation from poor venting, not the roof itself.

One thing I’d add: don’t overlook underlayment. I had a place where we splurged on high-end shingles but cheaped out on the underlayment - big mistake. When a windstorm hit, water got under a lifted shingle and we ended up with ceiling stains anyway. Since then, I always push for synthetic underlayment, especially if the roof pitch isn’t super steep.

In my experience, you get way more bang for your buck by focusing on the “boring” stuff - ventilation, insulation, flashing - than by chasing the fanciest shingle on the market. The roof is a system, not just what you see from the curb. It’s not glamorous, but it works.

I’ve seen the same thing - folks drop big money on “lifetime” shingles, but then ignore the basics. Had a client last spring, gorgeous composite roof, but they skipped ice & water shield at the eaves. First thaw, water’s dripping into the kitchen. Makes me wonder, have you found any particular underlayment that actually holds up when things go sideways? I’ve tried a few synthetics but can’t say I’m loyal to one brand yet.

I’ve tried a few synthetics but can’t say I’m loyal to one brand yet.

Not sure I buy into all the hype around synthetics. Tried a couple “premium” rolls and they still tore up at the valleys after one bad windstorm. Honestly, old-school 30# felt has held up better for me than some of the newer brands. Maybe it’s just luck, but I’m not convinced the latest stuff is always worth the extra cash.

Honestly, old-school 30# felt has held up better for me than some of the newer brands.

- Felt’s definitely got a track record. I’ve seen it outlast some synthetics, especially on jobs where the roof sat open for a while before shingles went on.
- Synthetics are lighter and easier to handle, but I’ve had a couple tear up in high winds too. Some brands just don’t seem as tough as they claim.
- On steep slopes, synthetics can be a pain - slippery as heck when you’re walking them. Felt gives a bit more grip, at least in my experience.
- That said, I’ve had good luck with synthetic underlayment on bigger roofs where speed matters. Rolls are longer, so fewer seams to worry about.
- Price-wise, felt’s usually cheaper up front, but some synthetics claim longer warranties. Not sure how much that matters if the stuff rips before you even get shingles down.

Curious if you’re in a spot with a lot of wind or just got unlucky with that storm? Around here (Midwest), we get gusts that’ll test any underlayment. I’ve started double-lapping valleys no matter what I use - seems to help.

Anyone else notice certain brands holding up better than others, or is it all just marketing?

I’ve definitely run into the same issue with synthetics tearing in wind, especially if there’s a delay before shingling. Last fall, I inspected a place where the synthetic underlayment had pulled loose in a couple of spots after a storm rolled through - looked like it just couldn’t handle the gusts. The felt on the other side of the roof was still holding tight, even though it was older.

On the flip side, I get why folks like synthetics for big roofs. Less time rolling it out, and you’re not stopping to reset as often. But I’m always a little wary of those “lifetime” warranties... they sound good, but if the material doesn’t actually stay put until the shingles are on, what’s the point?

Curious - has anyone here tried one of those newer “grip” synthetics that claim to be less slippery? I haven’t seen them much in my area (Northeast), but I’d be interested if they actually make a difference on steeper pitches.

- Seen the same thing with synthetics - if you get a big wind before shingles go on, it’s a gamble. Had one job where half the underlayment was flapping like a flag after a thunderstorm. Felt isn’t perfect, but it usually stays put if you nail it right.

- Those “grip” synthetics are popping up more around here (Midwest). They’re definitely less slick, which helps on steeper roofs, but I still worry about wind. If you’re roofing in a spot with unpredictable weather, I’d stick with felt unless you can shingle right away.

- Lifetime warranties sound great until you’re up there redoing underlayment after a storm... learned that the hard way.

I get where you’re coming from on the underlayment, but I’ve actually had better luck with synthetics - at least the higher-end ones. Had a stretch last spring where we got hit with back-to-back storms, and the synthetic held up way better than the old felt ever did on my other properties. Maybe it’s just the brand or how it was fastened, but I haven’t had to chase down loose sheets nearly as much. That said, I do agree, if you can’t get shingles on quick, it’s always a bit of a gamble no matter what you use. Weather just doesn’t care about warranties or marketing claims...

Weather just doesn’t care about warranties or marketing claims...

Ain’t that the truth. I’ve seen “lifetime” underlayments shredded after one bad windstorm, so I’m with you - nothing’s bulletproof if the weather’s angry enough. I do think the higher-end synthetics have come a long way, though. The grip is better, and they don’t wrinkle up like felt when it gets damp. Still, I always wonder about the environmental side of it. Some of those synthetics are basically plastic, and I haven’t found much info on how they break down over time (if at all).

Curious if you’ve noticed any difference in how the composite shingles themselves hold up with synthetic vs. felt underneath? I’ve heard some folks say the underlayment can actually affect shingle lifespan, but I’m not sure if that’s just marketing or if there’s something to it. My last job, we used a recycled-fiber underlayment - supposedly greener - but it was a pain to install and didn’t seem any tougher than felt. Anyone else tried those?

That’s interesting about the recycled-fiber stuff. I’ve only ever used felt or synthetic, and honestly, I can’t say I noticed a huge difference in how the shingles themselves aged - at least over the first 10 years. Did you see any impact on leaks or curling? I keep hearing claims that synthetics “breathe” better, but I’m not sure if that’s hype or if it actually helps in humid spots.

- Had a similar debate when I re-roofed last year. Ended up going with composite shingles made from recycled fibers - partly for the eco angle, but also because my neighbor swore by them after a rough storm season.

- In my case (humid summers, lots of rain), I did notice less curling compared to the old asphalt ones. No leaks so far, but it’s only been about 6 years.

- About the “breathing” thing... I was skeptical too. But after a couple muggy summers, the attic seemed less stuffy and I didn’t get that musty smell as much. Could be coincidence, or maybe it’s just better ventilation overall.

- One thing: installation matters a ton. My friend used synthetics but had issues because the crew rushed it and didn’t seal around vents right - so leaks happened anyway.

- Cost was a bit higher up front, but I’m hoping the longer lifespan and less landfill waste will balance it out over time.

- Not saying synthetics are magic, but in my climate, they’ve held up better than the old-school felt/asphalt combo. If you’re in a dry spot, maybe it’s less noticeable? Just my two cents...

Interesting to hear about the attic not feeling as musty - I've always wondered how much of that is the shingle material versus just better airflow from newer installs. I’ve got a few properties with older asphalt roofs, and honestly, the curling drives me nuts, especially after a couple rough winters. But I’ve also had tenants complain about noise with some of the newer composite options - like rain hitting plastic instead of the more muted sound on asphalt. Not a dealbreaker, but it surprised me.

Has anyone noticed a difference in how these composites handle hail? I’ve heard mixed things - some say they bounce back better, others say they can crack just as easily. Also, for those who went the eco-friendly route, did you have any issues with insurance coverage or warranties being different compared to standard asphalt? That’s come up for me once or twice and I’m still not sure if it’s just my area being picky.

I get what you mean about the noise - had a client last year who swore the new composite roof sounded like a drumline every time it rained. Personally, I think a lot of it comes down to install quality and attic insulation. As for hail, I’ve seen composites take a beating and come out looking fine, but I’ve also seen some crack in weird spots... not always predictable. Insurance can be a pain with “green” shingles - some companies act like you’re trying to roof your house with banana peels. It’s not just your area, trust me.

Had a similar situation with a neighbor - he went composite for the eco factor, but after the first big rainstorm, he was convinced he’d made a mistake because of the noise. Turns out, his installer skipped a layer of insulation to save costs. Once that got fixed, it was quieter than my old asphalt roof ever was. As for hail, I’ve seen both types get dinged up, but the composites seem to bounce back better in the long run if they’re good quality. Insurance is definitely behind the times... mine acted like I was asking for a spaceship when I mentioned recycled materials.

That insulation layer makes a world of difference - I've seen folks blame the shingles when it's really the skipped underlayment or lack of soundproofing. Composite's gotten a bad rap for noise, but honestly, with the right install, it's quieter than most people expect. As for hail, I’ve inspected plenty of both after storms, and you’re right - good composite tends to recover better over time. Insurance adjusters still seem to think anything “new” is risky... meanwhile, half the houses on my block are switching to recycled materials anyway.

I’ve run into the same thing with insurance folks - anything that isn’t the old standby gets a side-eye, even if it’s technically tougher. I’m curious, when you say composite recovers better after hail, are you talking about those newer polymer blends or more traditional fiberglass-based ones? I’ve seen some of the high-end synthetics bounce back with barely a mark, but the cheaper stuff can still get pitted.

Noise-wise, I think a lot of people underestimate what a solid underlayment and insulation can do. I had a customer swear their new composite roof was “louder” than their old asphalt, but when we checked, it turned out they’d skipped adding any soundproofing in the attic. Once that was fixed, they said it was quieter than before.

The recycled material trend is picking up around here too. I do wonder about long-term UV resistance - some of those products haven’t been on the market long enough to really know how they’ll look in 20 years. Anyone actually seen an older recycled composite roof up close?

I’m usually talking about the newer polymer blends when I say they recover better after hail. Some of the fiberglass-based stuff holds up, but those high-end synthetics really do seem to “bounce” back - at least in the installs I’ve seen. The cheaper composites are a mixed bag though, you’re right, they’ll pit or even crack if the hail’s bad enough.

On the recycled options, I’ve only seen a couple roofs that were maybe 12-15 years old, and they looked decent but definitely faded more than traditional asphalt. No major cracking or curling though. I’m still waiting to see how they hold up past the 20-year mark... UV is a wild card for sure, especially down south.

No major cracking or curling though. I’m still waiting to see how they hold up past the 20-year mark... UV is a wild card for sure, especially down south.

You’re not wrong about UV being a wildcard. Down here in Texas, I’ve seen some of those recycled composites fade way faster than asphalt, but they aren’t curling or splitting much either. The “bounce back” on high-end synthetics is real though - had a hailstorm last spring and my neighbor’s DaVinci roof looked untouched, while my old fiberglass shingles took a beating. Still, I wonder if that color fade will bug folks long-term or if it’s just cosmetic. Anyone else seeing the same?

Color fade’s definitely more than just cosmetic for some folks - especially if you paid extra for a certain look. But I’ve actually seen some older asphalt roofs get that patchy, streaky appearance from algae and granule loss, which can look worse over time. Composites might fade, but at least they seem to keep their shape and don’t shed bits everywhere after a big storm. I’d take a little fading over leaks or missing shingles, personally... but I get why it bugs people.

Gotta say, I’m not sure I’d trade color fade for durability every time. Here’s the thing:

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“Composites might fade, but at least they seem to keep their shape and don’t shed bits everywhere after a big storm.”

Guess it depends on what bugs you most - ugly streaks or unpredictable fading. For me, as long as it’s not leaking and I can fix it myself without breaking the bank, I’ll stick with asphalt for now.

Guess it depends on what bugs you most - ugly streaks or unpredictable fading.

That’s honestly where I landed too. When I bought my place last year, the roof was just past halfway through its life - standard asphalt, nothing fancy. I started researching composite because I figured “set it and forget it,” but the color fade thing kept coming up. The idea of patchy, sun-bleached spots right above my front porch just bugs me.

I’ve had to swap out a couple of asphalt shingles after a windstorm, and it was pretty straightforward. Matching colors wasn’t perfect (old vs new), but at least replacements are easy to find at any hardware store. With composites, I’d worry about getting left with some discontinued batch and a weird patch.

The heat warping you mentioned is what really gives me pause. We get 100+ days here too, so if composites aren’t holding up any better than asphalt in that respect... doesn’t seem worth the higher cost.

Algae streaks are annoying, but like you said, cleaning sprays help. For now, I’ll probably ride out the rest of this roof and see if anything changes by the time I need a full replacement.