I get where you’re coming from, but I’ve actually seen some of those newer deck seals hold up just fine, even on roofs that aren’t exactly “by the book.” Midwest winters are brutal, no doubt, but the tech on those seals has come a long way. I’ve put them on a couple of jobs where the homeowners didn’t want all the extra metal and labor with traditional flashing, and honestly, no leaks so far—even after a nasty ice storm last year.
That said, you do have to be picky about which product you use. Some of the cheap ones are basically glorified stickers and yeah, those will probably fail. But the higher-end seals, if installed right, can take a beating. I wouldn’t say they’re perfect for every roof, especially older ones with a lot of “character,” but I wouldn’t write them off completely either. Sometimes it just comes down to who’s doing the install and whether they actually follow the instructions instead of just winging it.
Had a roofer try to sell me on those fancy seals last summer. I was skeptical, but my wallet liked the idea of skipping all that extra metal and labor. My roof’s not exactly young, but after one gnarly hailstorm and a winter that felt like it lasted a year, still no leaks. I do keep an eye on them though... just in case the “glorified sticker” thing turns out to be true down the road.
I went with the deck-mounted seals on my last install, mainly because my roof’s got a low slope and I didn’t want to mess with cutting in a bunch of traditional flashing. I’ll admit, I was a bit uneasy about relying on what’s basically a high-end adhesive, but the manufacturer’s warranty and some good reviews swayed me. Two years in—one rough ice storm, a couple of heavy rains, and no leaks yet. I do check around the mounts every spring just to be sure nothing’s peeling or letting water creep in.
One thing I noticed: installation was way faster and less invasive. No prying up shingles or worrying about matching the old ones. But I’ve read that if your shingles are already brittle or curling, those seals might not stick as well long-term. My roof’s only about 8 years old, so the surface was still in decent shape.
If you’re in a spot with wild temperature swings or a lot of hail, I’d still keep an eye on them. The “glorified sticker” concern isn’t totally off base... but so far, it’s held up better than I expected.
I get the “glorified sticker” worry—my neighbor went with deck-mounted seals last year and had the same doubts. He’s in central Texas, so wild temperature swings and hail are a real thing. No leaks yet, but he did mention the adhesive edges started to lift a bit after a brutal summer. He just pressed them back down and added some sealant, seems fine now. Personally, I’m still old-school with flashing, but I can’t argue with how much faster those seals go in. If your shingles are in good shape, sounds like you’re set, but I’d keep an eye out after big storms just in case.
I’m kind of torn on this one, too.
That’s my worry—having to babysit the seals after every crazy storm. My roof’s only five years old (asphalt shingles), so I want to avoid anything that could void the warranty. If you go with deck seals, I’d check the edges after heavy rain or wind, just in case. With flashing, it’s more work up front but less to think about down the line. For me, peace of mind wins, even if it’s slower.He just pressed them back down and added some sealant, seems fine now.