Wondering if anyone’s had better luck with a cheap roll-on adhesive? I’m not convinced the fancy stuff is worth it on old wood...
Tried roll-on adhesive last year—honestly, it was less messy than I expected, but didn’t solve the peeling on my rough deck boards either. Maybe it helps on smoother surfaces, but my boards are like sandpaper. Felt’s not fancy, but at least it doesn’t pretend to stick where it won’t.
I’ve seen the same thing—those roll-on adhesives just don’t grab onto rough, splintery boards. I inspected a place last fall where the owner tried it over old pine planks, and it peeled up in sheets after the first freeze. Sometimes old-school felt is just more honest about its limits.
I get where you’re coming from—old felt’s definitely got its place, and yeah, it’s honest about what it can and can’t do. But I’ve seen a lot of folks write off the newer synthetics or adhesives too quick just because they had a bad install or the wrong surface. That roll-on stuff isn’t magic, but it’s not all junk either. The real problem is slapping it down on rough, splintery boards like you mentioned. If the deck’s not prepped right, nothing’s gonna stick well, not even the best felt.
I was on a job last spring where we had to re-deck half the roof because the old boards were so warped and splintered. The homeowner wanted to save money and just put synthetic underlayment over it, but we talked him into at least replacing the worst spots. Once we did that, the synthetic stuck like glue—even through a nasty hailstorm a few months later. No leaks, no peeling.
Honestly, I think a lot of these failures come down to skipping prep or trying to cut corners. Felt will forgive you a bit more if your deck’s rough, but then you’re trading off lifespan and weather resistance. Synthetics and adhesives need a smoother surface, but if you give them that, they’ll outlast felt by years in my experience.
Not saying felt’s useless—sometimes it’s all you can do on an old house with a tight budget. But if you want something that’ll really last (and you’re willing to put in the work up front), synthetics are worth another look. Just don’t expect miracles if you’re rolling them onto splinters and hoping for the best...
If the deck’s not prepped right, nothing’s gonna stick well, not even the best felt.
That part really rings true. I’ve managed a few older buildings over the years and I can’t count how many times someone tried to save a buck by skipping the prep. In my experience, it’s almost never worth it in the long run. One project that sticks out: we had a 1920s duplex with original plank sheathing—tons of gaps and splinters. The previous owner just slapped felt over it and called it good. Fast-forward two winters, and we were dealing with leaks around every vent.
When we finally got up there to redo things, here’s what actually made a difference:
1. Pulled up all the old felt and did a full inspection of the deck—marked every spot that was soft or had big gaps.
2. Replaced about 25% of the boards (more than I budgeted for, but worth it).
3. Sanded down some rough spots—not fun, but it made a huge difference for adhesion.
4. Went with a synthetic underlayment this time, since our weather’s all over the place (Midwest—one week it’s snowing, next it’s 90°F).
5. Made sure all fasteners were flush—no popped nails or screws poking up.
Result? No leaks for three years and counting, even after some wild storms last spring.
I do think felt has its place—like you said, sometimes you’ve got no choice on an old roof or if money’s tight. But if you’re aiming for longevity and less hassle down the road, prepping well and using synthetics just makes sense to me. It’s not about magic materials; it’s about doing each step right.
Funny enough, I’ve found that tenants never notice when you do things right... but they always notice when there’s a leak over their kitchen table! If underlayments could talk, they’d probably say “just give me a smooth spot to hang out and I’ll do my job.”