You nailed it with the flashing focus. I’ve seen too many folks drop cash on “premium” underlayments, but then a lazy flashing job ruins the whole thing. I’m all for greener, longer-lasting materials, but if the metalwork’s sloppy, it’s just landfill in a few years anyway. Your approach—prioritize the spots where leaks actually start—makes way more sense than chasing marketing claims.
That’s exactly what I ran into last year—spent extra on a “lifetime” underlayment, but the real headache was tracking down a leak from a poorly done chimney flashing. Honestly, I’d rather have basic felt with solid flashing than the fanciest underlayment and shortcuts around the vents. It’s wild how much marketing overshadows the basics sometimes...
Honestly, I’d rather have basic felt with solid flashing than the fanciest underlayment and shortcuts around the vents.
I get where you’re coming from—flashing is non-negotiable, and a bad install there will ruin any roof, no matter what’s underneath. But I wouldn’t write off high-end underlayments entirely. In my experience, especially on low-slope roofs or spots that see ice damming, the right synthetic or self-adhered membrane can be a lifesaver. Basic felt just doesn’t hold up to standing water or wind-driven rain the way some of these newer products do.
That said, I’ve seen plenty of “lifetime” underlayments fail early because someone skipped the basics—like not sealing around pipe boots or using cheap caulk at penetrations. It’s not really an either/or situation. You need both: quality materials and proper detailing. Marketing does oversell some of this stuff, but there’s a reason codes are pushing for better underlayments in certain climates. If you’re in a spot with heavy snow or wild temperature swings, it’s worth considering more than just felt—even if it costs more upfront.
I get the whole “don’t skimp on flashing” argument, but I gotta say, I’m not totally sold on the pricier underlayments for every situation. Like, I live in central Illinois—lots of wind, some snow, but nothing like what folks up north deal with. When I had my roof redone five years ago, the contractor tried to upsell me on some fancy synthetic stuff. I ended up sticking with 30# felt because, honestly, my budget was already stretched. I did make sure they didn’t cut corners on the flashing and around the chimney, though.
Funny enough, my neighbor across the street went all-in on the “lifetime” synthetic underlayment. His roof is only three years old and he’s already had leaks around his skylights. Turns out, the crew didn’t bother sealing the flashing right—just like you said:
That’s exactly what happened to him. Meanwhile, my old-school felt is still holding up fine.“I’ve seen plenty of ‘lifetime’ underlayments fail early because someone skipped the basics—like not sealing around pipe boots or using cheap caulk at penetrations.”
Not saying the new stuff doesn’t have its place. If I lived somewhere with crazy ice dams or a super low slope, maybe I’d think differently. But for a standard roof and a tight wallet, I’d rather spend extra making sure the install is done right than on a product that’s only as good as the guy nailing it down. Maybe that’s just me being stubborn, but I’ve seen too many “upgrades” go sideways because someone got lazy with the basics.
If I ever have to do it again, I might look at the newer membranes just for the peace of mind. But only if I trust the crew to actually do it right. Otherwise, I’ll stick with what’s worked and put the savings toward something I can actually see—like gutters that don’t leak every spring.
- Totally get where you’re coming from.
- I’ve seen more issues from sloppy installs than from the underlayment itself, honestly.
- You nailed it—flashing and details matter way more than the brand of felt or synthetic.
- My last roof was 30# felt too, and it’s still solid after a decade.
- Sometimes the “latest and greatest” just means more expensive headaches if the crew cuts corners.
- Gutters that actually work? Now that’s money well spent...