I went with standard metal flashing when I put mine in, but honestly, I wish I’d spent the extra for something with a UV-resistant coating. The sun here just chews up anything exposed, especially on a south-facing roof. I’ve tried those silicone-based sealants on some vent boots and pipe penetrations—so far, they’re holding up better than the old asphalt stuff, but it’s only been a couple years. Curious if anyone’s seen how they last after five or ten summers... I’m not convinced anything is truly “UV-proof,” but some of these newer products seem to buy you a little more time.
I hear you on the UV beating everything up. I cheaped out with basic flashing too, figuring I’d just replace it if it got bad. Now I’m patching little rust spots every summer... not exactly what I had in mind. Those silicone sealants seem to last longer, but I’ve only got about three years on mine so far. Nothing’s truly “forever” in this heat, but at least I’m not up there every spring with a caulk gun—yet.
Yeah, I’m starting to think there’s no such thing as “maintenance-free” when it comes to anything on a roof. I used the pricier flashing because I figured it’d be less hassle in the long run, but even that’s showing some wear after a couple years in this sun. The silicone around my vent lasted longer than the old tar stuff, but it’s already pulling away in spots. Maybe it’s just our climate—nothing seems to hold up for long with this heat and crazy storms.
Tell me about it... I thought going with the “good” flashing and a tube of the expensive stuff would buy me at least five years of peace, but nope. I’m in central Texas, and between the hail and the sun, everything just cooks or cracks. I’ve started checking my roof every spring and fall—found out the hard way after a surprise drip in the guest room. At this point, I just keep a caulk gun handy like it’s part of my regular tool kit.
Yeah, I hear you on the Texas sun just destroying everything up there. Even with the pricier sealants, I still end up redoing spots every year or two. One thing that’s helped me a bit is switching to a high-temp, flexible flashing tape under the metal flashing—sort of a belt-and-suspenders move, but it’s handled the expansion and contraction better than caulk alone. I also started using lighter-colored roofing materials to cut down on heat absorption. It’s not a miracle fix, but my attic fan seems to run less and the caulk isn’t baking off as fast. Still, nothing seems truly “set it and forget it” around here...