I’ve had better luck with the boots that have an all-metal base and a thicker rubber collar, but even those only seem to last about 5-7 years before the Midwest freeze-thaw cycles start cracking things. My roof’s a 9/12 pitch, so it’s not crazy steep, but I do think the angle makes water run off faster and maybe puts more stress on the flashing. Have you noticed if the sun exposure on your roof makes a difference? My south-facing side always seems to wear out first, no matter what material I try.
My south-facing side always seems to wear out first, no matter what material I try.
That’s pretty common, honestly. UV exposure on the south-facing slope just cooks those boots and flashings faster than anything else. Even the “UV-resistant” ones don’t seem to hold up as long as you’d hope. The pitch you mentioned does help with runoff, but it can also mean more direct sun for longer stretches each day. I’ve seen some folks try painting the boots with elastomeric coatings for a bit more protection, but results are mixed. Midwest weather is just brutal on roof details like that.
Even the “UV-resistant” ones don’t seem to hold up as long as you’d hope.
That's been my experience too. I’ve inspected a few roofs where the “lifetime” boots on the south side were splitting after maybe 6-7 years, while the north-facing ones looked fine. Elastomeric coatings can help, but they need to be reapplied and don’t always bond well with certain rubber types. Curious—has anyone tried metal retrofit collars? I’ve seen them advertised as a longer-term fix but haven’t seen enough installs yet to say how they really hold up.
Curious—has anyone tried metal retrofit collars? I’ve seen them advertised as a longer-term fix but haven’t seen enough installs yet to say how they really hold up.
I’ve actually seen a handful of those metal retrofit collars on jobs in the last couple years. They seem to do a decent job, especially for older boots that are starting to crack but aren’t totally shot yet. Only thing is, if the original boot’s already leaking, it might be too late for just a collar. Still, way less hassle than swapping out boots every few seasons... and honestly, climbing up there every spring isn’t my idea of a good time.
I’ve used those collars on a couple of my own vent stacks—definitely easier than replacing the whole boot, especially if you catch the cracks early. I will say, in really wet climates, they’re more of a stopgap than a permanent fix. Still beats hauling up new boots every year.