You make a solid point about synthetic underlayments holding up well, especially in tough climates. I've seen similar results myself—worked on roofs that had synthetic layers installed over a decade ago, and most were still in pretty impressive shape. But I wouldn't totally write off biodegradable options just yet.
A few years back, we did a job for a homeowner who insisted on going fully eco-friendly—biodegradable underlayment and all. I'll admit, at first, the crew had their doubts. We were used to relying on the synthetics because they're predictable and proven. But after going back for a follow-up inspection about three years later, the biodegradable stuff surprised us. It was holding strong, no signs of early deterioration or leaks. Granted, three years isn't ten, but it did give me some confidence that the technology's improving.
Realistically, though, it comes down to priorities. If you're in an area with brutal winters or heavy storms, synthetic is probably still your safest bet. It's tried and true, and you know exactly what you're getting. But if you're somewhere milder or you're focused on sustainability, biodegradable underlayments are starting to catch up. Manufacturers seem to be investing more in improving their durability, so maybe in the next few years, it'll be less of a gamble.
Either way, it's always good practice to check with your supplier about warranty coverage and see if they've got any long-term case studies or examples in your specific climate. That can make a big difference when you're weighing your options.
"Realistically, though, it comes down to priorities."
Exactly this. I've seen biodegradable underlayments hold up surprisingly well in moderate climates, but after a major hailstorm or heavy wind event... synthetic usually comes out ahead. Still, eco-friendly tech is definitely getting better each year.
"synthetic usually comes out ahead."
True, synthetic might have the edge in durability, but honestly, the price difference can be pretty steep. When we redid our roof last year, I went biodegradable mostly because it fit the budget better. So far, no regrets—it's held up fine through some decent storms. Makes me wonder though, is the extra cost of synthetic really justified if you're not in an extreme weather zone?
Went synthetic myself, but honestly...not sure I'd do it again. Yeah, it's tough stuff, held up fine through some heavy rains, but the price difference was noticeable. My neighbor used regular felt at the same time and his roof looks just as good as mine after 3 years. Makes me wonder if synthetic's really worth it unless you're dealing with constant harsh conditions? Has anyone compared how both types age over a longer period?
"Makes me wonder if synthetic's really worth it unless you're dealing with constant harsh conditions?"
- Good point... synthetic's great for harsh weather or steep roofs.
- Seen both types after 7-8 years; synthetic usually holds up better, fewer wrinkles or tears.
- But honestly, felt can easily last 15+ yrs with proper installation and decent climate.
