NEED ADVICE ON REPLACING AN OLD LEAKY ROOF
- Synthetic underlayment is definitely more durable, especially if the roof deck is going to be exposed for a bit. It’s less likely to tear or wrinkle if you get hit with a storm mid-project.
- Felt’s been around forever and still works, but it’s not as forgiving. If you’re working in a climate with unpredictable weather, synthetic is just less hassle.
- One thing I’ve noticed: synthetic is lighter, so it’s easier to handle on steep pitches or big roofs. That can save you some time (and your back).
- Cost difference isn’t huge, but if you’re pinching pennies, felt is cheaper up front. Just keep in mind, if you have to redo any sections because of wind or rain damage before you shingle, you might lose those savings.
- If you’re planning on staying in the house long-term, I’d lean synthetic. For a quick flip or rental, felt’s probably fine.
I’ve seen both last, but synthetic gives you a little more breathing room if things don’t go exactly to plan.
NEED ADVICE ON REPLACING AN OLD LEAKY ROOF
Synthetic underlayment is definitely more durable, especially if the roof deck is going to be exposed for a bit. It’s less likely to tear or wrinkle if you get hit with a storm mid-project.
That’s been my experience too, though I’d caution people not to treat synthetic like it’s invincible. I’ve seen it hold up better than felt when a project stalls out due to weather, but it can still get damaged if you leave it exposed for weeks. One thing I’d add—some synthetics can get slick when wet, which is a safety issue on steeper roofs. Not all brands are equal in that regard.
The comment about cost is spot on. Felt’s cheaper, but if you’re dealing with unpredictable weather (and honestly, who isn’t these days?), the risk of having to redo sections can eat up those savings fast. Also, local building codes sometimes specify what type of underlayment is allowed or required, especially in high-wind or fire-prone areas. Worth double-checking before you commit.
Long-term, synthetic seems to make more sense, but I wouldn’t call felt obsolete just yet. It still has its place, especially for smaller jobs or tight budgets. Just be realistic about the risks if the weather doesn’t cooperate.
NEED ADVICE ON REPLACING AN OLD LEAKY ROOF
You’re spot on about synthetic underlayment being a game changer, especially if you’re not finishing the roof in a single push. I’ve had projects where storms rolled in out of nowhere, and the synthetic held up way better than old-school felt would’ve. That said, I’ve also seen a couple brands that turned into a skating rink after a good rain—definitely something to watch for if you’ve got a steep pitch or you’re working solo.
One thing I’d add: when you’re laying down synthetic, make sure your fastener spacing matches the manufacturer’s recommendations. Some folks get lazy, thinking it’s “tougher,” but wind can still get under loose edges and cause problems. And yeah, codes are all over the map on this. I did a job last year where we had to use a specific type because of wildfire risk. Didn’t love it, but rules are rules.
Felt’s still fine for quick repairs or smaller roofs, but for anything else, synthetic just makes life easier... as long as you stay realistic about its limits.
NEED ADVICE ON REPLACING AN OLD LEAKY ROOF
I hear you on the synthetic underlayment—definitely a step up from felt, especially if you’re worried about sudden weather. One thing I’d toss in: if you’re already going synthetic, maybe look into recycled-content options? Some brands use post-consumer plastics, which is a nice bonus if you’re trying to keep things a bit greener. Not all of them are created equal, though, and yeah, some are slick as heck when wet. I’ve nearly gone sledding off a roof before... not fun. Just something to keep in mind if you’re weighing your choices.
NEED ADVICE ON REPLACING AN OLD LEAKY ROOF
That’s a good point about synthetic underlayment, especially the recycled-content options. I’ve seen a few projects where folks went with those, and it’s honestly encouraging to see more manufacturers stepping up with greener materials. The post-consumer plastic blends can be a solid choice if you’re aiming to reduce your environmental footprint, though I’d double-check the certifications—some products are more “greenwashed” than genuinely sustainable.
One thing I’d add: if you’re in a region with a lot of temperature swings, pay close attention to how the underlayment handles expansion and contraction. Some of the recycled synthetics can get a bit brittle in extreme cold, which isn’t always obvious from the marketing materials. I learned that the hard way on a job a couple winters back—ended up with a few seams that didn’t hold as well as I’d hoped. Not a dealbreaker, but worth asking the supplier about.
And yeah, the slickness is real. I’ve had a few “whoops” moments myself, especially on steeper pitches. If you’re DIY-ing any of it, those grippy shoe covers are worth every penny. Not glamorous, but neither is sliding off the roof.
If you’re looking to go even further, some folks are experimenting with underlayments made from bio-based materials, like recycled cellulose or even hemp. They’re not as widely available yet, and the price point can be a bit higher, but it’s interesting to see where the industry is heading.
All in all, synthetic with recycled content is a step in the right direction. Just make sure to check the specs for your climate and roof type. And maybe keep a broom handy for those slippery mornings...