- That crinkling noise is real—synthetic’s definitely noisier underfoot, especially before the shingles go on. I’ve seen a few pets freak out over it too.
- In terms of long-term hold-up, synthetic usually wins out for water resistance and tear strength, especially in storm-prone areas.
- Felt does hug the deck better at first, but once the shingles settle, you’re right—it’s tough to spot a difference from the ground.
- One thing: synthetic can get slick if it’s wet, so be careful walking on it during install.
- I’ve seen felt degrade faster in hot, humid climates, but it’s still a solid choice for quick jobs or tight budgets.
I’ve inspected a lot of roofs in the Southeast, and honestly, the climate here really puts both types through their paces. I agree synthetic usually holds up better over time, especially when you’re dealing with heavy rain or hurricane winds. I’ve seen felt just peel back or turn brittle after a few years of humidity and heat waves. It’s wild how fast it can go from “looks fine” to “why is there a puddle in the attic?”
But I’ll say this—felt does have its place. On smaller jobs or where someone’s flipping a house and needs to keep costs down, it’s a decent option. It lays down quick, and if you’re not expecting the roof to last more than a decade, it can do the trick. I’ve had a few clients who went with felt because they were planning to re-roof again soon anyway.
One thing I wish more folks would talk about is how synthetic underlayment can make things tricky for repairs later. Some of the newer synthetics are so tough that getting shingles off without tearing up the underlayment is a pain. I’ve seen roofers curse up a storm trying to patch a leak because the stuff just won’t budge. Not a dealbreaker, but something to keep in mind if you expect to be up there fixing things yourself.
And yeah, that slickness when wet is no joke. I nearly took a tumble last summer checking out a new build after a rainstorm. Felt isn’t exactly grippy, but synthetic is like ice sometimes.
If you’re in a spot with wild weather, synthetic’s probably worth the extra cost. But for a quick fix or on a tight budget, felt still gets the job done. Just don’t expect miracles if you live somewhere that eats roofs for breakfast.
You nailed a lot of what I’ve noticed, especially about the Southeast weather just chewing up roofs. I’m still learning the ropes, but even in the short time I’ve been around job sites, it’s obvious how quickly felt can go from “fine” to “uh-oh.” The humidity here is brutal on it. I’ve seen rolls that looked okay in the truck, but after a summer or two, they’re curling up at the edges or just falling apart when you try to pull them.
I get what you mean about synthetic being tough for repairs. We had a patch job last month where the underlayment was so stubborn, we ended up having to cut out a whole section just to get at the leak. It’s kind of a double-edged sword—great for keeping water out, but not so fun if you need to get under it later. Still, I’d rather fight with tough material than deal with water stains in someone’s ceiling.
The slickness is no joke either. I almost lost my footing on a synthetic underlayment after a quick rain. Felt isn’t perfect, but at least you don’t feel like you’re skating. Makes me wonder why more manufacturers don’t add some kind of grit or texture.
I do think felt has its place, especially for quick flips or when someone’s on a tight budget. Not everyone needs their roof to last 30 years. But if you’re putting money into a long-term home, synthetic seems worth it—even if it means cursing during repairs down the line.
Appreciate your take on this. It’s easy to get caught up in what’s “best,” but there’s always trade-offs depending on the job and budget.
- I’ve been digging into this a lot since buying my place last year (asphalt shingle roof, humid Georgia climate). Definitely agree—felt just doesn’t hold up in the humidity. I found some old felt scraps in my attic and they basically crumbled when I touched them.
- The synthetic stuff on my neighbor’s new roof looks way sturdier, but he did complain about how slippery it was when he tried to check a vent after a storm. That’s a real safety thing, especially if you’re not used to being up there.
- Cost was a big factor for me. My roofer quoted about 30% more for synthetic, but the warranty was much better (20+ years vs maybe 5-10 for felt). For a house I plan to stay in, that seemed worth it.
- One thing I noticed: repairs are definitely trickier with synthetic. My friend had to patch a spot and said it was a pain to cut through without damaging the shingles above.
- If I was flipping or renting, maybe I’d go with felt just to save cash. But for peace of mind long-term, synthetic seems like the safer bet—even if it means cursing during repairs or tiptoeing after rain.
- Still wish someone would invent a non-slip version though...
I’m right there with you on the cost vs. longevity debate. When I replaced my roof (asphalt shingles, north Alabama—so, similar humidity), I was leaning hard toward felt just because the price was easier to swallow. But after seeing how fast the old stuff broke down, especially around the vents and edges, I started thinking about what it’d cost me in repairs down the line.
Here’s how I broke it down for myself:
1. Upfront cost: Felt was about 25% cheaper for me, but the warranty was only 7 years. Synthetic was pricier, but came with a 25-year warranty.
2. Labor: My roofer said synthetic is lighter and goes on faster, so labor costs were actually a bit lower than I expected.
3. Repairs: Like you mentioned, synthetic is a pain to cut through for patches. I had to fix a shingle after a branch fell, and it took me way longer than it would’ve with felt. Not impossible, just more annoying.
4. Safety: The slipperiness is no joke. I nearly ate it trying to clear some pine needles after a rainstorm. If you’re planning to do any DIY work up there, that’s something to think about.
One thing I’m still not sure about—does synthetic actually breathe better than felt? I’ve heard mixed things. Some folks say it traps moisture underneath, others swear it’s more resistant to mold and rot. Anyone have real-world experience with that? Especially in these muggy southern summers...
If you’re planning to stay put for a while, I’d say synthetic is probably worth the extra upfront cost for peace of mind. But if you’re on a tight budget or thinking of moving in a few years, felt might make more sense—just be ready for more frequent repairs.
Curious if anyone’s tried one of those hybrid underlayments? Supposedly they combine the best of both worlds, but I haven’t seen them used much around here.