Flashing tape can surprise you, but I’ve seen it fail in weird ways too—especially after a couple freeze-thaw cycles. Sometimes it’s just luck of the draw. Out of curiosity, did you use any sealant under the fan’s flange or just rely on the tape? I’ve found that combo can make a difference, but it’s a pain if you ever need to remove the unit later.
That’s exactly what I’m nervous about. I only used flashing tape under the flange when I put in my solar attic fan last fall. We had a pretty mild winter, so nothing’s leaked yet (fingers crossed), but now you’ve got me second-guessing it for next year. The roof is maybe 15 years old—standard asphalt shingles, not steep at all—which I thought would be forgiving, but now I’m wondering if I should’ve done more.
I almost went with a bead of sealant around the flange, but honestly, I chickened out because I was worried about making a mess or gluing everything together permanently. Like you said, “it’s a pain if you ever need to remove the unit later.” That was my big hesitation. But now I keep thinking about what happens when we get those crazy spring rainstorms and the tape starts to lift...
Has anyone here actually had to take one of these fans back out after sealing everything? Is it total chaos getting the old stuff off without wrecking the shingles? And does using both tape and sealant really buy you extra peace of mind, or does it just create more hassle down the road?
I’m still learning as I go with all this home maintenance stuff. Feels like there’s always a trade-off—either risk a leak or risk having to redo half the roof if something goes wrong later. Maybe I’m overthinking it, but every time I climb up there now, I check that fan like three times just to make sure nothing’s peeling up.
Curious if anyone in colder climates has had better luck with one method over the other? Or is this just one of those things where you do your best and hope for the best?
Has anyone here actually had to take one of these fans back out after sealing everything? Is it total chaos getting the old stuff off without wrecking the shingles?
I actually had to pull a solar fan off my garage roof last year—used both flashing tape and a bead of sealant under the flange, thinking I’d be extra careful. Honestly, it wasn’t as much of a nightmare as I expected. The sealant (I used Lexel) came up with some gentle prying and a putty knife, and the tape left a bit of residue but didn’t tear the shingles. The trick was working slow and doing it on a warm day so everything was more pliable.
That said, I don’t totally buy into the “double up for peace of mind” thing. If your shingles are in decent shape and you’ve got the flange tucked right, just tape or just a good quality sealant seems fine—both can be overkill unless your roof is super exposed or you’re in a spot with wild weather swings. I get being nervous about leaks, but sometimes piling on more products just makes future repairs harder.
I’m in upstate NY, so we get plenty of freeze-thaw. Haven’t had leaks since switching to just sealant, for what that’s worth. Sometimes simpler really is better.
The trick was working slow and doing it on a warm day so everything was more pliable.
That’s the secret sauce right there. Warm shingles are way more forgiving—cold days turn sealant into cement and your patience into confetti. I’ve seen folks panic about “wrecking the roof,” but honestly, with a putty knife and a little finesse, most modern shingles hold up fine. If you ever do run into stubborn tape residue, a dab of mineral spirits usually gets things moving. No chaos—just a bit of elbow grease and maybe some colorful language.
Couldn’t agree more about the warm day trick—makes all the difference. I tried prying up shingles on a chilly morning once and it felt like trying to bend potato chips. Honestly, I’m always surprised how tough modern shingles are, though I still get nervous about breaking the seal. For me, a little patience and a plastic putty knife keeps things from getting ugly. And yeah, mineral spirits are a lifesaver... just don’t overdo it or you’ll end up with shiny spots.
That’s a good point about the seal—breaking it always feels like you’re risking a leak down the line, especially if you’re working in cooler temps. I’ve found that even on a warm day, some of those newer laminated shingles can be stubborn. I usually run a heat gun on low if I’m worried about cracking, but you have to be careful not to overdo it or you’ll soften the asphalt too much. As for mineral spirits, I’ve seen folks go overboard and end up with a patchy look, so I stick to just enough to get the job done.