Sun exposure really does a number on caulk, especially on the south side—UV breaks it down faster than most folks expect. Even the “lifetime” stuff is usually optimistic in harsh climates. Polyurethane’s better for durability, but yeah, it’s a hassle to apply and clean up. Flashing issues sneak up on people all the time… I’ve seen tiny gaps cause major headaches. You’re not alone dealing with this.
Even the “lifetime” stuff is usually optimistic in harsh climates.
That’s been my experience too. I used “lifetime” silicone on the south side, and it still started cracking after about five years. Polyurethane held up better, but man, what a pain to work with—sticky as tar and impossible to clean off your hands. I’ve also learned the hard way that even a tiny gap in flashing can let water in and cause rot behind the siding. Sometimes I wonder if my roof’s still holding up because of good prep or just dumb luck... probably a bit of both.
“Lifetime” is a funny word in roofing—usually means “lifetime of the product, not your house.” I’ve seen silicone caulk get brittle after just a few summers here in Texas. Polyurethane does hold up better, but yeah, it’s like wrestling with bubble gum. For flashing, I always run a bead under AND over the edge, then tool it in with a gloved finger. Still, even with all that prep, sometimes water finds its way in... Murphy’s Law of roofs, I guess.
Yeah, “lifetime” warranties always crack me up—my last place had “lifetime” shingles that started curling at year 12. Down here in the Gulf, I’ve found even the best caulks just don’t stand up to the combo of heat and storms. What’s helped me is a yearly inspection routine: check all flashing, especially around chimneys and vents, clear debris, and touch up any suspect spots with fresh sealant. It’s not perfect, but it’s caught a few leaks before they got ugly. Sometimes I wonder if it’s luck or just stubborn persistence...
I hear you on the “lifetime” label—seems like marketing more than anything, especially in this climate. But honestly, I think you’re underselling your routine a bit. In my experience, it’s not luck at all. Most folks I see with major roof issues just skip the regular checks and only notice problems when water’s already coming in. That yearly inspection is doing way more than you think, even if it feels like you’re just patching things up. Down here, roofs are about maintenance, not miracles...